Copolymers from n-alkyl-3-alkenylene-2-pyrrolidone
US4931519A · kind A · utility
63Cited by
4References
1Claims
0Family size
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Key dates
| Filing date | May 5, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | May 5, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.