Ointment base
US4983385A · kind A · utility
35Cited by
2References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 29, 1988 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Sep 29, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/006
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An ointment base which comprises: PA1 (a) a hydrogel formed by a water-soluble polymer and a material selected from the group consisting of water, a polyhydric alcohol and a mixture thereof; PA1 (b) a methacrylate copolymer selected from a group consisting of dimethylaminoethyl methacrylate/methyl methacrylate copolymer, ethyl methacrylate/chlorotrimethylammonium ethyl methacrylate copolymer or a mixture thereof; and PA1 (c) a solubilizer which dissolves the methacrylate copolymer but is incompatible with water and the polyhydric alcohol, PA1 a weight ratio of the methacrylate copolymer to the solubilizer being 1:2-1:25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.