US2993836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release tablets
Assignee: Dow Chemical Co
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Filing: 1958-02-20
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Granted: 1961-07-25
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Expires: 1978-02-20
Abstract
No abstract record available.
Inventors
- 👤 Harold A Nash
- 👤 Sampson F Jeffries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:45
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2072; A61K9/2086; A61K9/209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PHARMACEUTICAL PREPARATION COMPRISING A COMPRESSED TABLET CONTAINING AS THE ESSENTIAL CARRIER INGREDIENTS APPROXIMATELY EQUAL PARTS OF GLYCERYL MONOSTEARATE AND GUM KARAYA AND AN AMOUNT OF A SOLID, NON-TOXIC PARTICULATE, ESSENTIALLY WATER INSOLUBLE MATERIAL IN AN AMOUNT EQUAL TO THAT OF THE COMBINED QUANTITIES OF GLYCERYL MONOSTEARATE AND GUM KARAYA, SAID CARRIER COMBINATION HAVING INCORPORATED THEREIN UP TO ABOUT 15% BY WEIGHT THEREOF OF SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF A SELECTED THERAPEUTIC AGENT AND COMBINATIONS OF SELECTED THERAPEUTIC AGENTS, SAID TABLET BEING SLOWLY DISINTEGRATABLE AT A UNIFORM RATE IN AN AQUEOUS MEDIUM INDEPENDENT OF THE PH OF SAID MEDIUM.
Claim 2
Dependent Claim
101 words
A PHARMACEUTICAL PREPARATION COMPRISING A COMPRESSED TABLET CONTAINING AS THE ESSENTIAL CARRIER INGREDIENTS APPROXIMATELY EQUAL PARTS OF GLYCERYL MONOSTEARATE AND GUM KARAYA AND AN AMOUNT OF A SOLID, NON-TOXIC PARTICULATE, ESSENTIALLY WATER INSOLUBLE MATERIAL IN AN AMOUNT EQUAL TO THAT OF THE COMBINED QUANTITIES OF GLYCERYL MONOSTEARATE AND GUM KARAYA, SAID CARRIER COMBINATION HAVING INCORPORATED THEREIN UP TO ABOUT 15% BY WEIGHT THEREOF OF SUBSTANCES SELECTED FROM THE GROUP CONSISTING OF A SELECTED THERAPEUTIC AGENT AND COMBINATIONS OF SELECTED THERAPEUTIC AGENTS, SAID TABLET BEING SLOWLY DISINTEGRATABLE AT A UNIFORM RATE IN AN AQUEOUS MEDIUM INDEPENDENT OF THE PH OF SAID MEDIUM.
References Cited (Backward Citations)
US2793979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |