EP Patent

EP0463754A1 — Stabilization of glutarimide polymers

Assigned to Rohm and Haas Co · Expires 1992-01-02 · 34y expired

What this patent protects

Polymers containing a predominance of units of N-(lower alkyl)dimethylglutarimide and substantially free of units of methacrylic acid or methacrylic anhydride may be stabilized against discoloration, both in processing of the polyglutarimide and in heat aging, by inclusion of cer…

USPTO Abstract

Polymers containing a predominance of units of N-(lower alkyl)dimethylglutarimide and substantially free of units of methacrylic acid or methacrylic anhydride may be stabilized against discoloration, both in processing of the polyglutarimide and in heat aging, by inclusion of certain trialkylphosphite or aliphatic bicyclic diphosphite stabilizers.

Drugs covered by this patent

Patent Metadata

Patent number
EP0463754A1
Jurisdiction
EP
Classification
—
Expires
1992-01-02
Drug substance claim
No
Drug product claim
No
Assignee
Rohm and Haas Co
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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