EXHIBIT 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 15th day of October, 1991. H. L. FULLER Signature H. L. Fuller Print Name 1 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 15th day of October, 1991. F. S. ADDY Signature F. S. Addy Print Name 2 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 14th day of December, 1992. JOHN L. CARL Signature John L. Carl Print Name 3 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 15th day of October, 1991. L. D. THOMAS Signature L. D. Thomas Print Name 4 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 15th day of October, 1991. P. J. EARLY Signature P. J. Early Print Name 5 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 17th day of October, 1991. DONALD R. BEALL Signature Donald R. Beall Print Name 6 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 21st day of October, 1991. RUTH BLOCK Signature Ruth Block Print Name 7 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 22nd day of October, 1991. JOHN H. BRYAN Signature John H. Bryan Print Name 8 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 21st day of October, 1991. ERROLL DAVIS Signature Erroll Davis Print Name 9 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 22nd day of October, 1991. RICHARD FERRIS Signature Richard Ferris Print Name 10 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 25th day of October, 1991. ROBERT H. MALOTT Signature Robert H. Malott Print Name 11 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, L. D. Thomas, and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 2nd day of July, 1993. WALTER E. MASSEY Signature Walter E. Massey Print Name 12 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 18th day of October, 1991. MARTHA R. SEGER Signature Martha R. Seger Print Name 13 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, L. D. Thomas, and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 23rd day of February, 1994. MICHAEL WILSON Signature Michael Wilson Print Name 14 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and appoints H. L. Fuller, R. D. Cadieux, L. D. Thomas and F. S. Addy, and each of them, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign (i) any and all Amoco Corporation registration statements and amendments thereto relating to issuance, through or in connection with employee benefit plans, of Amoco Corporation common stock and plan interests, and (ii) annual reports of Amoco Corporation on Form 10-K, for any fiscal year, and (iii) any and all amendments to Registration Statements Nos. 33-11635 and 33-22897 on Form S-3, and to file the same with the Securities and Exchange Commission, with all exhibits thereto, and all other documents as may be necessary or appropriate in connection therewith, granting unto said attorney-in-fact and agent, full power and authority to do and perform each and every act and thing which said attorneys and agents, or any of them, deem advisable to enable Amoco Corporation to comply with the federal or state securities laws, and any requirements or regulations in respect thereto, as fully to all intents and purposes as he or she might or could do in person, and the undersigned does hereby ratify and confirm all that said attorney-in-fact and agent, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof. IN WITNESS WHEREOF, the undersigned has executed this power of attorney on the 17th day of October, 1991. RICHARD D. WOOD Signature Richard D. Wood Print Name 15