Patent US4495588A successfully refreshed from Google Patents.
Patent US3362881A successfully refreshed from Google Patents.
US3362881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release tablet and method of manufacturing same
Assignee: C.H. Boehringer Sohn AG and Co KG
•
Filing: 1964-07-07
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Granted: 1968-01-09
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Expires: 1984-07-07
Abstract
No abstract record available.
Inventors
- 👤 Eberhardt Klaus
- 👤 Rothing Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:08
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/205; A61K9/2054; A61K9/2027; A61K9/2072; A61K9/2086; A61K9/209
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A COMPRESSED PHARMACEUTICAL TABLET FOR ORAL ADMINISTRATION CHARACTERIZED BY ITS ABILITY TO RELEASE ITS ACTIVE THERAPEUTIC COMPONENT AT A SUBSTANTIALLY UNIFORM RATE IN THE GASTRO-INTESTINAL TRACT, SAID TABLET CONSISTING ESSENTIALLY OF A COMPRESSED MIXTURE OF AN EFFECTIVE AMOUNT OF AN ACTIVE THERAPEUTIC AGENT, 50 TO 500% BY WEIGHT, BASED ON THE WEIGHT OF SAID THERAPEUTIC AGENT, OF A SWELLING AGENT SELECTED FROM THE GROUP CONSISTING OF A CARBOXYMETHYL CELLULOSE, ALKALI METAL SALTS OF CARBOXYMETHYL CELLULOSE, POLYACRYLIC ACID AND MIXTURES THEREOF AND 10 TO 50% BY WEIGHT, BASED ON THE WEIGHT OF SAID THERAPEUTIC AGENT, OF AN INGREDIENT SELECTED FROM THE GROUP CONSISTING OF MEDIUM VISCOSITY POLYVINYLACETATE WATERINSOLUBLE POLYMER AND CELLULOSE ACETATE PHTHALATE FILMFORMING AGENT.
Claim 2
Dependent Claim
114 words
A COMPRESSED PHARMACEUTICAL TABLET FOR ORAL ADMINISTRATION CHARACTERIZED BY ITS ABILITY TO RELEASE ITS ACTIVE THERAPEUTIC COMPONENT AT A SUBSTANTIALLY UNIFORM RATE IN THE GASTRO-INTESTINAL TRACT, SAID TABLET CONSISTING ESSENTIALLY OF A COMPRESSED MIXTURE OF AN EFFECTIVE AMOUNT OF AN ACTIVE THERAPEUTIC AGENT, 50 TO 500% BY WEIGHT, BASED ON THE WEIGHT OF SAID THERAPEUTIC AGENT, OF A SWELLING AGENT SELECTED FROM THE GROUP CONSISTING OF A CARBOXYMETHYL CELLULOSE, ALKALI METAL SALTS OF CARBOXYMETHYL CELLULOSE, POLYACRYLIC ACID AND MIXTURES THEREOF AND 10 TO 50% BY WEIGHT, BASED ON THE WEIGHT OF SAID THERAPEUTIC AGENT, OF AN INGREDIENT SELECTED FROM THE GROUP CONSISTING OF MEDIUM VISCOSITY POLYVINYLACETATE WATERINSOLUBLE POLYMER AND CELLULOSE ACETATE PHTHALATE FILMFORMING AGENT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |