1
                                                                    Exhibit 10.2
                                                                    ------------


                  PERMITTED USER AGREEMENT - TRADE MARK MARSTON
                  ---------------------------------------------

THIS AGREEMENT is made the 27th day of March One Thousand nine hundred and
ninety-eight between IMI Marston Limited (registered in England No 155987) whose
registered office is at Wobaston Road, Fordhouses, Wolverhampton WV10 6QJ,
United Kingdom (hereinafter called "IMI") of the one part and Chart Marston
Limited (registered in England No 3497115) whose registered office is at 55
Colmore Row, Birmingham B3 2AS (hereinafter called the "User") of the other part

WHEREAS 
- -------

A.      IMI is the proprietor of the trade mark MARSTON details of which are set
        out in Schedule 1 in respect of heat exchangers (hereinafter called "the
        Trade Mark").

B.      The User desires to be permitted to use the Trade Mark in respect of the
        goods described in Parts 1 and 2 of Schedule 4 (hereinafter called "the
        Goods").

NOW IT IS HEREBY AGREED AS FOLLOWS:
- ----------------------------------

1       IMI hereby grants to the User:

        (i)     an exclusive royalty-free licence to use the Trade Mark in, upon
                or in connection with the manufacture, marketing, promotion,
                sale, repair, design, testing and provision of after-sales
                services of the Part 1 Goods (as defined in Schedule 4); and

        (ii)    an exclusive royalty free licence to use the name "Chart
                Marston" or "Chart Marston Limited" as a corporate, business or
                trading name and to use the 

   2

                Trade Mark in conjunction with any other corporate, business or
                trading name subject to the prior written approval of IMI which
                shall not be unreasonably withheld or delayed; and

        (iii)   a non-exclusive royalty free licence to use the Trade Mark in,
                upon or in connection with the manufacture, marketing,
                promotion, sale, repair, design, testing and provision of after
                sales services of the Part 2 Goods (as defined in Schedule 4).

        within the countries listed in Schedule 2 to this Agreement ("the
        Territory") providing the User observes the following conditions or
        restrictions:

        a)      The User shall use the Trade Mark only upon or in connection
                with the Goods which are manufactured by or on behalf of the
                User in accordance with standards, specifications and
                instructions reasonably laid down by IMI and notified in writing
                to the User from time to time and to the quality standards
                required by BS9001 or ASME "U" stamp approval as updated from
                time to time or an equivalent national or international
                standard. For the sake of clarity, standards other than relating
                to quality shall be no more onerous than the standards in use
                during 1997 by IMI for the Goods.

        b)      The User, on being given reasonable written notice, shall permit
                IMI and/or its authorised representative to inspect the premises
                of the User, the Goods offered for sale under the Trade Mark in
                accordance with this Agreement and the method by which they are
                manufactured, and shall do all such things as may be reasonably
                necessary to ensure that the Goods conform to the standards
                specified above.



                                       2
   3

        c)      The User undertakes not to use the Trade Mark accompanied by any
                other trade marks in relation to the Goods unless the Trade Mark
                is sufficiently distinguished from the surrounding and adjacent
                text and/or trade mark(s) and IMI or any subsequent proprietor
                is identified as the proprietor of the Trade Mark, nor to take
                any actions which would compromise the continuing validity of
                any rights of IMI in the Trade Marks. The User shall further
                comply with all reasonable written directions given by IMI
                regarding the use of the Trade Mark on the Goods and/or on all
                notepaper, invoices, transfers, labels, packages, package
                inserts, advertising matter and other media of all kinds issued
                or employed by the User upon or in connection with the Goods
                (the "Materials"). The User shall also submit to IMI, for
                approval, the original format and all subsequent new formats of
                such of the Materials which incorporate the Trade Mark and shall
                not issue the same without the prior approval of IMI, which
                shall not unreasonably be withheld or delayed. IMI shall be
                deemed to have given its approval of any of the Materials if it
                does not give to the User written notice to the contrary within
                10 days after receipt of the original format or subsequent new
                format, as appropriate, of the Materials.

        d)      The User may sub-contract the manufacture, marketing, promotion,
                sale, repair, design, testing and provision of after-sales
                services of the Goods to any third party and shall be entitled
                to sub-license such third party to use the Trade Mark for such
                purposes provided that the User shall remain liable for all of
                its obligations and responsibilities under this Agreement.


                                       3
   4

2       The User shall be the sole permitted user of the Trade Mark for the Part
        1 Goods during the life of this Agreement. The parties shall immediately
        upon the execution of this Agreement execute a formal licence of the
        Trade Mark in the form set out in Schedule 3 to this Agreement to be
        registered with the United Kingdom Trade Marks Registry or such formal
        licence in substantially similar terms to be registered with the
        relevant competent authority in the country of registration of the Trade
        Mark within the Territory. The costs of registration shall be borne by
        both parties equally. In the event of any inconsistency between the
        provisions of this Agreement and any formal licence executed pursuant to
        this Clause 2, the provisions of this Agreement shall prevail.

3       No right, title or interest in the Trade Mark, except as set out in this
        Agreement, is transferred by this Agreement to the User, and the Trade
        Mark remains the sole property of IMI and any and all use thereof
        including use by the User shall inure to the benefit of IMI.

4       As and when requested by and at the expense of IMI, the User hereby
        undertakes to use all reasonable efforts to provide any documentation
        which is required by IMI to apply for or renew a registration of the
        Trade Mark. Where IMI applies for and subsequently obtains further
        registrations of the Trade Mark in respect of the Goods then such new
        registrations shall be included in Part 1 of Schedule 1 and shall be
        deemed to be licensed by IMI to the User as part of the Trade Mark
        pursuant to this Agreement. The User also undertakes not to obstruct or
        to try to prevent the registration of the Trade Mark by IMI and not to
        assist third parties, whether directly or indirectly, in any action
        against registration or renewal of the Trade Mark.



                                       4
   5

5       The User shall forthwith notify IMI of any suspected unauthorised use of
        the Trade Mark which may come to its notice. The User may request IMI to
        commence or defend any proceedings in respect of any unauthorised use or
        suspect unauthorised use of the Trade Mark but if IMI decides not to
        commence or defend any such proceedings within a period of two months
        from the date of such request the User shall have the right to commence
        or defend any such proceedings in its own name, subject to IMI's prior
        written approval which shall not be reasonably withheld or delayed.
        Where such written approval is given by IMI, it shall give the User such
        assistance as may be reasonably required by the User including agreeing
        to be joined in as a party to the issue or defence of any proceedings,
        subject to payment by the User of all reasonable costs and expenses
        incurred by IMI in providing such assistance. The User shall be entitled
        to retain for its own absolute benefit any damages, costs or other
        expenses awarded or recovered in any such proceedings.

6       The User shall not sell or transfer control of any company using the
        name MARSTON as part of the name of such company without first changing
        the name of the company to exclude the name MARSTON.

7       IMI shall promptly pay all renewal and maintenance fees for the
        registration of the Trade Mark for the Goods during the term of this
        Agreement. With effect from 1 January 1999, the User shall reimburse IMI
        for sixty per cent of the total direct costs (including attorneys costs
        and internal administration costs) reasonably incurred by IMI in
        registering, establishing use of, renewing and defending the Trade Mark
        (subject to an overall maximum contribution by the User of (pound)25,000
        per calendar year) (the "Contribution") in the Territory. 


                                       5
   6

        IMI shall provide the User with a calendar quarterly statement in
        arrears setting out full details of all direct costs paid by IMI
        together with copies of payment receipts accompanied by an invoice for
        part of the Contribution. Such invoices shall be payable by the User
        within 30 days of receipt. 

        In the event that, for whatever reason, the total direct costs incurred
        by IMI in registering, establishing use of, renewing and defending the
        Trade Mark in the Territory in any calendar year, exceed the
        Contributions from the User, and if IMI wishes to cease to maintain or
        defend any registration of the Trade Mark for the Goods, it shall notify
        the User to that effect. The User may within 30 days of the date of
        receipt of such notification from IMI call for an assignment of the
        Trade Mark and in that event IMI shall at the User's costs, do all such
        things and take all such actions as may be necessary to assign the Trade
        Mark to the User. In the event that the User takes such an assignment it
        shall further reimburse IMI for any reasonable costs incurred in
        defending or maintaining an assigned registration between the date of
        notification to the User and the date of assignment.

8       In the event that the User shall be in breach of this Agreement and
        fails or be unable to remedy the same within sixty days of its attention
        being called thereto in writing specifying the breach and requiring it
        to be remedied, or the User shall go into liquidation whether
        voluntarily or compulsorily (otherwise than for the purpose of
        amalgamation or reconstruction), or ceases to be owned beneficially by
        Chart Industries Inc, IMI shall have the right by notice in writing to
        terminate this Agreement forthwith in its entirety without prejudice,
        however, to any rights either party may have against the other arising
        prior to termination.

                                       6
   7

9       Subject to Clause 8 hereof this Agreement shall commence on the date
        hereof and shall remain in force for five years from the date of this
        Agreement. It may be renewed by the User for further periods of five
        years each, by the User giving notice in writing to IMI or any
        subsequent beneficial owner of the Trade Mark within the last twelve
        months of the then current term of the Agreement.

10.1    The User may at any time assign all or any of its rights and obligations
        under this Agreement to any company which is for the time being a
        subsidiary or holding company of the User or a subsidiary of any such
        holding company (and the terms "subsidiary" and "holding company" shall
        have the meaning given to them by Sections 736 and 736A of the Companies
        Act 1985 ("Users Group") without the prior written consent of IMI or to
        any third party subject to the prior written consent of IMI which shall
        not be unreasonably withheld or delayed provided that in each case it is
        only assigned with the whole of the business of the User and provided in
        the case of any assignment to a member of the User's Group it notifies
        IMI in writing to that effect at least 7 days prior to such assignment.
        IMI may not assign the whole or any part of the benefit or burden of
        this Agreement without the prior written consent of the User which shall
        not be unreasonably withheld or delayed except that IMI shall be free to
        assign the benefit of this Agreement to any third party which acquires
        the legal and beneficial ownership of the Trade Mark, provided it
        notifies the User in writing to that effect at least 7 days prior to
        such transfer of ownership.

10.2    The User shall indemnify IMI in respect of any liability of IMI for
        taxation consequent upon the assignment of all or any of the User's
        rights and obligations under this Agreement.



                                       7
   8

10.3    If any sum payable under Clause 10.2 of this Agreement by the User to
        IMI is subject to tax in the hands of IMI, the User shall pay to IMI
        such additional amount (after taking into account any taxation payable
        in respect of such additional amount) as will ensure that IMI receives
        and retains a nett amount equal to the full amount which it would have
        received and retained had the payment not been subject to tax.

11      Upon the termination of this Agreement in accordance with Clause 8, the
        User shall not later than 60 days from the date of termination remove or
        obliterate the Trade Mark from all and any Materials used in connection
        with the Goods in the possession, custody or control of the User and the
        User shall after expiry of such 60 day period cease to make any use of
        the Trade Mark or any colourable imitation thereof.

12.1    Any notice, request or other communication to be given by either party
        to the other party under this Agreement shall be in writing and may be
        served by personal delivery or by registered or recorded first class
        post or facsimile to the addresses and numbers set out above (or such
        other address(es) or number(s) as either party may have specified by
        giving at least seven (7) days prior written notice to the other).

12.2    The effective date of any notice given in accordance with Clause 12.1
        shall be, in the case of personal delivery upon delivery or in the case
        of facsimile, the next day after it was transmitted and, in the case of
        post three (3) days after it was sent.

12.3    To prove service of any notice it shall be sufficient to show in the
        case of a notice delivered by hand that the same was duly addressed and
        delivered by hand and in the case of a notice served by post that the
        same was duly addressed prepaid and posted in the manner set out in
        Clause 12.1. In the case of a notice given by facsimile it shall be
        sufficient to produce a transmission report generated by the relevant
        facsimile


                                       8
   9

        machine to show that the notice was successfully transmitted.

13      This Agreement shall be governed by and construed in accordance with
        English law and the parties hereto agree to submit to the exclusive
        jurisdiction of the English courts any claim or dispute arising
        hereunder provided that any dispute as to the validity, scope or
        infringement of the Trade Mark shall be determined by the courts or any
        competent authority in the country of registration of the relevant Trade
        Mark

        IN WITNESS WHEREOF the parties hereto have caused this Agreement to be
        executed by their duly authorised representatives as follows the day and
        year first above written.


                                       9
   10

                                   SCHEDULE 1
                                   ----------

                                 THE TRADE MARK

                             PART 1 REGISTERED MARK





    TERRITORY                   TRADE MARK               REGISTRATION NO
    ---------                   ----------               ---------------

                                                     
    Benelux                     Marston                  56535
    Canada                      Marston                  450515
    Denmark                     Marston                  1565-1976
    France                      Marston                  1528837
    Ireland                     Marston                  81772
    Italy                       Marston                  255969
    Japan                       Marston                  1025273
    Japan                       Marston                  2036677
    United States               Marston                  1885699
    UK                          Marston                  997450
    UK                          Marston                  997451
    UK                          Marston                  1040203
    UK                          Marston                  1040204
    UK                          Marson                   1040205
    UK                          Marston                  1216767
    UK                          Marston                  1216768
    UK                          Marston                  1286002
    UK                          Marston                  1359330
    UK                          Marston Compact          1499186
                                Exchangers
    United States               Marston                  74/373739
    United States               Marston                  72632500



                                       10
   11



                            PART 2 UNREGISTERED MARK
                           MARSTON NAME, MARK AND LOGO

                                   SCHEDULE 2
                                   ----------

                                  THE TERRITORY

1       In relation to the Trade Mark set out in Part 1 of Schedule 1: The
        United Kingdom, Benelux, Canada, Denmark, France, Ireland, Italy, Japan
        and the United States of America.

2       In relation to the Trade Mark set out in Part 2 of Schedule 1: All other
        countries in the world other than those listed in 1 above.


                                   SCHEDULE 3
                                   ----------

                     (THE FORM OF LICENCE FOR REGISTRATION)

        THIS AGREEMENT is made on ___________________ 19[__] BETWEEN: IMI
        Marston Limited (registered in England No 155987) whose registered
        office is at Wobaston Road, Fordhouses, Wolverhampton WV10 6QJ, United
        Kingdom (hereinafter called "IMI") of the one part and Chart Marston
        Limited (registered in England No 3497115) whose registered office is at
        55 Colmore Row, Birmingham B3 2AS (hereinafter called the "User.")

        WHEREAS:

        (A)     IMI is the registered proprietor of the trade marks set out in
                the Schedule to this Agreement (the "TRADE MARKS")

        (B)     The parties have entered into an agreement for the grant of a
                licence to the User by IMI under the Trade Marks.

                                       11
   12

        NOW THIS DEED WITNESSETH:

        1       IMI grants to the User, inter alia, an exclusive royalty-free
                licence subject to and upon the terms and conditions of an
                agreement dated 27th March 1998 between IMI (1) and the User (2)
                under the Trade Marks ("MAIN AGREEMENT")

        2       IMI will join with the User in making application to the
                Registrar of Trade Marks for the purpose of securing the
                registration of the User as a licensee of the Trade Marks under
                the provisions of Section 25 of the Trade Marks Act 1994

        3       This Agreement shall terminate automatically on the termination
                of the Main Agreement.

        IN WITNESS OF THE ABOVE the parties have executed this Agreement as a
        Deed on the date written at the head of this Agreement



                                       12
   13

                                  THE SCHEDULE
                                  ------------

             [DUPLICATE PART 1 OF SCHEDULE 1 TO THE MAIN AGREEMENT]


         EXECUTED as a Deed by     )
         IMI MARSTON LIMITED       )
         acting by:                )  Director

                                      Director/Secretary



         EXECUTED as a Deed by     )
         CHART MARSTON LIMITED     )  Director
         acting by:                )
                                      Director/Secretary








                                       13
   14

                                   SCHEDULE 4
                                   ----------
                                    THE GOODS
                                     PART 1


         Industrial heat exchangers manufactured using technology and/or
         know-how acquired from IMI and all or any developments, modifications
         and improvements arising therefrom (excluding those for use in aerial
         or terrestrial transport or electronic applications) ("Part 1 Goods").

                                     PART 2

         Industrial heat exchangers for use in Railway Engines and Railway Stock
         manufactured using technology and/or know-how acquired from IMI and all
         or any developments, modifications and improvements arising therefrom
         ("Part 2 Goods").




                                       14
   15

         For and on behalf of
         IMI Marston Limited

         /s/ Trevor Davies
         -----------------
         Director




         For and on behalf of
         Chart Marston Limited

         /s/ Arthur S. Holmes
         --------------------
         Director












                                       15