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Serving hundreds of leading biopharmaceutical companies globally:

Boehringer Ingelheim
US Army

Generated: March 24, 2018

DrugPatentWatch Database Preview

Details for Patent: 5,932,462

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Summary for Patent: 5,932,462
Title: Multiarmed, monofunctional, polymer for coupling to molecules and surfaces
Abstract:Multi-armed, monofunctional, and hydrolytically stable polymers are described having the structure ##STR1## wherein Z is a moiety that can be activated for attachment to biologically active molecules such as proteins and wherein P and Q represent linkage fragments that join polymer arms poly.sub.a and poly.sub.b, respectively, to central carbon atom, C, by hydrolytically stable linkages in the absence of aromatic rings and ester groups in the linkage fragments. R typically is hydrogen or methyl, but can be a linkage fragment that includes another polymer arm. A specific example is an mPEG disubstituted lysine having the structure ##STR2## where mPEG.sub.a and mPEG.sub.b have the structure CH.sub.3 O--(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 CH.sub.2 -- wherein n may be the same or different for mPEG.sub.a and mPEG.sub.b and can be from 1 to about 1,150 to provide molecular weights of from about 100 to 100,000. The mPEG disubstituted lysine can be purified from a reaction mixture by chromatography in water, including gel filtration chromatography and ion exchange chromatography because the carboxyl group is ionizable. Impurities are removed, including unreacted mPEG and mPEG monosubstituted lysine, to provide the polymer in pure form. Ion exchange chromatography permits fractionation of a greater amount of polymer per run.
Inventor(s): Harris; J. Milton (Huntsville, AL), Veronese; Francesco Maria (Padua, IT), Caliceti; Paolo (Padua, IT), Schiavon; Oddone (Padua, IT)
Assignee: Shearwater Polymers, Inc. (Huntsville, AL)
Application Number:08/443,383
Patent Claim Types:
see list of patent claims
Compound; Dosage form; Use;

Drugs Protected by US Patent 5,932,462

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted
Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted

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Serving hundreds of leading biopharmaceutical companies globally:

Express Scripts
Boehringer Ingelheim

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