Foam products
US4339550A · kind A · utility
36Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1981 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Jan 26, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/905
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Foam products are disclosed which are produced by incorporating active materials, utilizing in situ methods, into the cell structure of hydrophillic polyurethane foams. The products obtained are characterized by a controlled rate of release of the active material from the foam structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.