US3773920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release medicinal composition
Assignee: Kowa Co Ltd
•
Filing: 1971-07-14
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Granted: 1973-11-20
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Expires: 1991-07-14
Abstract
Abstract A SUSTAINED RELEASE MEDICINAL COMPOSITION IS FORMED FROM (1) 100 PARTS OF BY WEIGHT GRANULES CONTAINING A MEDICAMENT, A METAL SALT OF A HIGHER FATTY ACID AND A BINDER, (2) 50-200 PARTS BY WEIGHT OF ETHYL CELLULOSE AND (3) 30-120 PARTS BY WEIGHT OF A WATER SOLUBLE POLYMER.
Inventors
- 👤 A Nakamoto
- 👤 K Ogawa
- 👤 T Ukigaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:06
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2072; A61K9/2077; A61K9/14; A61K9/16; A61K9/1605; A61K9/1617; A61K9/2004; A61K9/2022; A61K9/205; A61K9/2054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |