Chemically acting intra-uterine device
US3934580A · kind A · utility
38Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 11, 1974 |
| Grant date | Jan 27, 1976 |
| Priority date | — |
| Expiry date | Nov 11, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M31/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention is directed to an active intrauterine device comprising a hydrophobic substrate of high mechanical resiliency, wherein the substrate including within the volume thereof inclusions of polymerizied hydrophilic substances grafted on the hydrophobic substrate and cross-linked, and in which water-soluble chemical agents have been stored previously, these agents being adapted to perfuse through the hydrophobic substrate when the latter is placed in an aqueous medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.