Transdermal contraceptive formulations
US4816258A · kind A · utility
122Cited by
13References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Feb 26, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S424/14
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A transdermal delivery system for the administering of ethinyl estradiol and levonorgestrel, in combination, utilizing a polymer matrix having the drug formulation along with a permeation enhancer dispersed throughout.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.