Liquid crystal membrane
US4968539A · kind A · utility
19Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1988 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Nov 30, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A polymer membrane for delivering a drug is provided. The membrane is capable of regulating the delivery of the drug and comprises (A) a porous hydrophobic polymer membrane having a pore diameter of not larger than 3 .mu.m and a porosity of 10 to 90% which is immobilized with (B) a specific liquid crystal-forming compound having a gel/liquid crystal transition temperature in the range of 25.degree. to 45.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.