US3101293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled release compositions and their preparation
Assignee: Strong Cobb Arner Inc
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Filing: 1961-04-28
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Granted: 1963-08-20
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Expires: 1981-04-28
Abstract
No abstract record available.
Inventors
- 👤 William E Gaunt
- 👤 Robert P Tansey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:08
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/1605; A61K9/1629; A61K9/1652; A61K9/1617
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR PREPARING A CONTROLLED RELEASE COMPOSITION WHICH REGULATES THE RATE OF RELEASE OF A THERAPEUTIC AGENT INTO ALIMENTARY FLUIDS VARYING IN PH FROM THE ACIDITY OF GASTRIC JUICE TO THE ALKALINITY OF INTESTINAL FLUIDS WHICH COMPRISES COMBINING A SOLUTION OF AN ACID-RESISTANT ALKALISUSCEPTIBLE MATERIAL IN A NON-POLAR/POLAR SOLVENT MIXTURE CONTAINING AT LEAST ABOUT 50% NON-POLAR SOLVENT WITH A SEPARATE SOLUTION OF AN ALKALI-RESISTANT ACID-SUCEPTIBLE MATERIAL IN THE SAME SOLVENT MIXTURE, INCORPORATING A THERAPEUTIC AGENT INTO ONE OF SAID SOLUTIONS PRIOR TO COMBINING THE SOLUTIONS, REMOVING SOLVENT FROM TE GEL STRUCTURE WHICH FORMS AND BREAKING THE DRIED GEL INTO PARTICLES, WHEREBY EACH GEL PARTICLE HAS THE THERAPEUTIC AGENT SUBSTANTIALLY UNIFORMLY DISPERSED THERETHROUGH IN DISCRETE FORM.
Claim 2
Dependent Claim
116 words
A PROCESS FOR PREPARING A CONTROLLED RELEASE COMPOSITION WHICH REGULATES THE RATE OF RELEASE OF A THERAPEUTIC AGENT INTO ALIMENTARY FLUIDS VARYING IN PH FROM THE ACIDITY OF GASTRIC JUICE TO THE ALKALINITY OF INTESTINAL FLUIDS WHICH COMPRISES COMBINING A SOLUTION OF AN ACID-RESISTANT ALKALISUSCEPTIBLE MATERIAL IN A NON-POLAR/POLAR SOLVENT MIXTURE CONTAINING AT LEAST ABOUT 50% NON-POLAR SOLVENT WITH A SEPARATE SOLUTION OF AN ALKALI-RESISTANT ACID-SUCEPTIBLE MATERIAL IN THE SAME SOLVENT MIXTURE, INCORPORATING A THERAPEUTIC AGENT INTO ONE OF SAID SOLUTIONS PRIOR TO COMBINING THE SOLUTIONS, REMOVING SOLVENT FROM TE GEL STRUCTURE WHICH FORMS AND BREAKING THE DRIED GEL INTO PARTICLES, WHEREBY EACH GEL PARTICLE HAS THE THERAPEUTIC AGENT SUBSTANTIALLY UNIFORMLY DISPERSED THERETHROUGH IN DISCRETE FORM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |