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US 4,931,519 AGranted
Copolymers from n-alkyl-3-alkenylene-2-pyrrolidone
AssigneeWarner-Lambert Company
InventorsSuk-Zu Song, Surendra C. Mehta, Kuchi S. Murthy, Russell U. Nesbitt, Mahdi B. Fawzi
Life of this patent
Estimating the term…
Abstract
A new series of copolymers which are useful as coatings for solid dosage forms, for transdermal devices, for wound dressing materials, and for contact lenses. Also disclosed are methods for preparing monomers and polymers as well as pharmaceutical compositions containing such polymers.
Claims1
A copolymer of N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate having an equilibrium water concentration of 36.5% by weight at room temperature.
Dependencies are inferred from the claim text.