Patent US2793979A successfully refreshed from Google Patents.
US2793979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a sustained release pharmaceutical tablet and product of the method
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1953-03-30
•
Granted: 1957-05-28
•
Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 Edward V Svedres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2072; A61K9/2077
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A SUSTAINED RELEASE PHARMACEUTICAL TABLET COMPRISING NON-SUSTAINED RELEASE GRANULES OF A SELECTED SOLID MEDICAMENT, SUSTAINED RELEASE GRANULES COMPRISING SAID MEDICAMENT DISPERSED IN SOLID FATTY MATERIAL RESISTANT TO DISINTEGRATION AND SLOWLY DISPERSIBLE IN THE GASTRO-INTESTINAL TRACT, EACH OF SAID SUSTAINED RELEASE GRANULES INCLUDING, IN ADDITION TO SAID MEDICAMENT AND SAID SOLID FATTY MATERIAL, A CARRYING MATRIX OF DRIED SYRUP SOLIDS FROM A DEHYDRATED GRANULATING SOLUTION, AND THE SUSTAINED RELEASE GRANULES TAKEN TOGETHER FORMING A MATRIX HOLDING THE NON-SUSTAINED RELEASE GRANULES, SAID TABLET MAINTAINING A TTHERAPEUTIC LEVEL OF THE MEDICAMENT OVER AN EXTENDED PERIOD OF TIME.
Claim 2
Dependent Claim
94 words
A SUSTAINED RELEASE PHARMACEUTICAL TABLET COMPRISING NON-SUSTAINED RELEASE GRANULES OF A SELECTED SOLID MEDICAMENT, SUSTAINED RELEASE GRANULES COMPRISING SAID MEDICAMENT DISPERSED IN SOLID FATTY MATERIAL RESISTANT TO DISINTEGRATION AND SLOWLY DISPERSIBLE IN THE GASTRO-INTESTINAL TRACT, EACH OF SAID SUSTAINED RELEASE GRANULES INCLUDING, IN ADDITION TO SAID MEDICAMENT AND SAID SOLID FATTY MATERIAL, A CARRYING MATRIX OF DRIED SYRUP SOLIDS FROM A DEHYDRATED GRANULATING SOLUTION, AND THE SUSTAINED RELEASE GRANULES TAKEN TOGETHER FORMING A MATRIX HOLDING THE NON-SUSTAINED RELEASE GRANULES, SAID TABLET MAINTAINING A TTHERAPEUTIC LEVEL OF THE MEDICAMENT OVER AN EXTENDED PERIOD OF TIME.
References Cited (Backward Citations)
US2207990A
Cited
US1928346A
Cited
US2055083A
Cited
US2086766A
Cited
US2142537A
Cited
US2195596A
Cited
US2478182A
Cited
US2566200A
Cited
US2538092A
Cited
US2619447A
Cited
US2553806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-27 | 1960-11-26 | 1961-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-27 | 1964-11-26 | 1965-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-27 | 1968-11-26 | 1969-05-28 | $7700.00 | Window Closed / Lapsed |