N-substituted-3-alkylene-2-pyrrolidone compounds
US4851545A · kind A · utility
62Cited by
3References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 2, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Jun 2, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A new series of copolymers such as N-isopropyl-3-methylene-2-pyrrolidone and 2-hydroxyethylmethacrylate 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.