As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 12/6/99  Isp Chemco Inc.                   SC 13D/A               2:70K  Life Technologies Inc.            Weil Gotshal & Ma… 04/FA 
          A. Chang³
          Bear, Stearns & Co. Inc.³
          Dinan Management Corp.³
          Dinan Management, L.L.C.³
          Fredrick R. Adler - I.A.M. Trust³
          Idoya Partners³
          International Specialty Products Inc.³
          Isp Investments Inc.³
          Isp Ireland³
          Isp Opco Holdings Inc.³
          James G. Dinan³
          JGD Management Corp.³
          Prescott Associates³
          Prescott International Partners, L.P.³
          T.W.Smith (As Trustee) - J. McKenzie Trust³
          T.W.Smith (As Trustee) - L.C. Wolfensohn Trust³
          The Cohen Revocable Trust³
          Thomas N. Tryforos³
          Thomas W. Smith³
          York Capital Management, L.P.³
          York Investment Ltd.³
 5/11/99  Isp Chemco Inc.                   SC 13D/A               2:64K  Life Technologies Inc.            Weil Gotshal & Ma… 04/FA 
          A. Chang³
          Bear, Stearns & Co. Inc.³
          Dinan Management Corp.³
          Dinan Management, L.L.C.³
          Fredrick R. Adler - I.A.M. Trust³
          Idoya Partners³
          International Specialty Products Inc.³
          Isp Investments Inc.³
          Isp Ireland³
          Isp Opco Holdings Inc.³
          James G. Dinan³
          JGD Management Corp.³
          Prescott Associates³
          Prescott International Partners, L.P.³
          T.W.Smith (As Trustee) - J. McKenzie Trust³
          T.W.Smith (As Trustee) - L.C. Wolfensohn Trust³
          The Cohen Revocable Trust³
          Thomas N. Tryforos³
          Thomas W. Smith³
          York Capital Management, L.P.³
          York Investment Ltd.³
12/24/98  Isp Chemco Inc.                   SC 13D/A               1:71K  Life Technologies Inc.            Weil Gotshal & Ma… 04/FA 
          A. Chang³
          Bear, Stearns & Co. Inc.³
          Dinan Management Corp.³
          Dinan Management, L.L.C.³
          Fredrick R. Adler - I.A.M. Trust³
          Idoya Partners³
          International Specialty Products Inc.³
          Isp Investments Inc.³
          Isp Ireland³
          Isp Opco Holdings Inc.³
          James G. Dinan³
          JGD Management Corp.³
          Prescott Associates³
          Prescott International Partners, L.P.³
          Samuel J. Heyman³
          T.W.Smith (As Trustee) - J. McKenzie Trust³
          T.W.Smith (As Trustee) - L.C. Wolfensohn Trust³
          The Cohen Revocable Trust³
          Thomas N. Tryforos³
          Thomas W. Smith³
          York Capital Management, L.P.³
          York Investment Ltd.³
12/21/98  Isp Chemco Inc.                   SC 13D/A               2:76K  Life Technologies Inc.            Weil Gotshal & Ma… 04/FA 
          A. Chang³
          Bear, Stearns & Co. Inc.³
          Dinan Management Corp.³
          Dinan Management, L.L.C.³
          Fredrick R. Adler - I.A.M. Trust³
          Idoya Partners³
          International Specialty Products Inc.³
          Isp Investments Inc.³
          Isp Opco Holdings Inc.³
          James G. Dinan³
          JGD Management Corp.³
          Prescott Associates³
          Prescott International Partners, L.P.³
          Samuel J. Heyman³
          T.W.Smith (As Trustee) - J. McKenzie Trust³
          T.W.Smith (As Trustee) - L.C. Wolfensohn Trust³
          The Cohen Revocable Trust³
          Thomas N. Tryforos³
          Thomas W. Smith³
          York Capital Management, L.P.³
          York Investment Ltd.³

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¹	Filing/Form Type:  -K
	SC 13D	Statement of Acquisition of Beneficial Ownership by an “Active” Investor — Schedule 13D.
	/A	Amendment to, or Amended version of, a previous Filing of this Type.
³	Group Member:  A Registrant or non-Registrant party to this Filing made by a Group.