1 ============================================================================== SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 --------------- SCHEDULE 13E-3 RULE 13E-3 TRANSACTION STATEMENT (PURSUANT TO SECTION 13(E) OF THE SECURITIES EXCHANGE ACT OF 1934) (AMENDMENT NO. 6) LIFE TECHNOLOGIES, INC. (NAME OF THE ISSUER) DEXTER CORPORATION DEXTER ACQUISITION DELAWARE, INC. (NAME OF THE PERSONS FILING STATEMENT) COMMON STOCK $.01 PAR VALUE PER SHARE (TITLE OF CLASS OF SECURITIES) 532177201 (CUSIP NUMBER OF CLASS OF SECURITIES) --------------- BRUCE H. BEATT, ESQ. VICE PRESIDENT, GENERAL COUNSEL AND SECRETARY DEXTER CORPORATION ONE ELM STREET WINDSOR LOCKS, CT 06096 (860) 292-7675 (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED TO RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF PERSONS FILING STATEMENT) --------------- COPY TO: JERE R. THOMSON, ESQ. JONES, DAY, REAVIS & POGUE 599 LEXINGTON AVENUE NEW YORK, NEW YORK 10022 (212) 326-3939 ============================================================================== 2 Dexter Acquisition Delaware, Inc., a Delaware corporation ("Purchaser") and a wholly-owned subsidiary of Dexter Corporation, a Connecticut corporation ("Parent"), and Parent hereby amend and supplement their Rule 13e-3 Transaction Statement on Schedule 13E-3, filed with the Securities and Exchange Commission (the "Commission") on November 2, 1998, as amended by Amendments No. 1, 2, 3, 4 and 5 thereto filed with the Commission on November 5, 1998, November 12, 1998, November 23, 1998, December 2, 1998 and December 7, 1998, respectively (as so amended, the "Schedule 13E-3"). Capitalized terms not defined herein have the meaning ascribed to them in the Schedule 13E-3. ITEM 17. MATERIAL TO BE FILED AS EXHIBITS. Item 17 of the Schedule 13E-3 is hereby amended and supplemented to add the following exhibit: (d)(15) Summary Advertisement, dated December 7, 1998 (previously filed as Exhibit (a)(15) to the Schedule 14D-1 and incorporated herein by reference). 3 \ SIGNATURE AFTER DUE INQUIRY AND TO THE BEST OF MY KNOWLEDGE AND BELIEF, I CERTIFY THAT THE INFORMATION SET FORTH IN THIS STATEMENT IS TRUE, COMPLETE AND CORRECT. Dated: December 8, 1998 DEXTER ACQUISITION DELAWARE, INC. By: /s/ Kathleen Burdett ----------------------------------- Name: Kathleen Burdett Title: Treasurer DEXTER CORPORATION By: /s/ Bruce H. Beatt ----------------------------------- Name: Bruce H. Beatt Title: Vice President, General Counsel and Secretary 4 EXHIBIT INDEX EXHIBIT NUMBER DESCRIPTION ------- ----------- (d)(15) Summary Advertisement, dated December 7, 1998 (previously filed as Exhibit (a)(15) to the Schedule 14D-1 and incorporated herein by reference).