Cold water-insoluble polyvinyl alcohol pouch for the controlled release of active ingredients
US4289815A · kind A · utility
61Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 4, 1979 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | May 4, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31855
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A pouch for the controlled release of active ingredients into an aqueous medium comprising liquid or solid active ingredients enclosed in a sealed envelope of cold water-insoluble polyvinyl alcohol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.