Membrane-forming polymeric systems
US4729190A · kind A · utility
41Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1986 |
| Grant date | Mar 8, 1988 |
| Priority date | — |
| Expiry date | Jul 25, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K9/2846
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Membrane-forming polymeric systems comprising the molecular association product of a polymeric carboxylic acid having at least 10% of the monomer units containing free carboxylic groups with an ethoxylated nonionic surfactant; methods for the preparation of such polymeric systems; and a broad range of applications for such systems with particular emphasis on the release of diverse active agents at a continuous and controlled rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.