Patent US2030603A successfully refreshed from Google Patents.
US3148124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing sustained release pharmaceutical tablets
Assignee: Individual
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Filing: 1962-06-12
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Granted: 1964-09-08
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 William E Gaunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:25
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE METHOD OF PREPARING ORAL DOSAGE FORMULATIONS COMPRISING WATER-SOLUBLE MEDICAMENTS AND WATERTIONS COMPRISING WATER-SOLUBLE MEDICAMENTS AND WATERINSOLUBLE MATERIALS, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF (1) COMPLETELY SOLUBILIZING A DOSAGE QUANTITY OF AT LEAST ONE WATER-SOLUBLE MEDICAMENT IN A SOLVENT TO FORM A SOLUTION, (2) MIXING SAID SOLUTION WITH AT LEAST ONE WATERINSOLUBLE LATTICE FORMING MATERIAL, SAID MATERIAL BEING INSOLUBLE IN THE SOLVENT AND SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METAL SALTS OF THE HIGHER MOLECULAR WEIGHT FATTY ACIDS, ALUMINUM OXIDES AND SILICA GELS, (3) REMOVING SAID SOLVENT TO OBTAIN A SUBSTANTIALLY DRY MIXTURE; AND (4) COMPRESSING SAID MIXTURE INTO TABLETS HAVING A LATTICE STRUCTURE WITH A CONTINUOUS INTERPHASE OF THE MEDICAMENT WITHIN THE INTERSTICES.
Claim 2
Dependent Claim
117 words
IN THE METHOD OF PREPARING ORAL DOSAGE FORMULATIONS COMPRISING WATER-SOLUBLE MEDICAMENTS AND WATERTIONS COMPRISING WATER-SOLUBLE MEDICAMENTS AND WATERINSOLUBLE MATERIALS, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF (1) COMPLETELY SOLUBILIZING A DOSAGE QUANTITY OF AT LEAST ONE WATER-SOLUBLE MEDICAMENT IN A SOLVENT TO FORM A SOLUTION, (2) MIXING SAID SOLUTION WITH AT LEAST ONE WATERINSOLUBLE LATTICE FORMING MATERIAL, SAID MATERIAL BEING INSOLUBLE IN THE SOLVENT AND SELECTED FROM THE GROUP CONSISTING OF ALKALINE EARTH METAL SALTS OF THE HIGHER MOLECULAR WEIGHT FATTY ACIDS, ALUMINUM OXIDES AND SILICA GELS, (3) REMOVING SAID SOLVENT TO OBTAIN A SUBSTANTIALLY DRY MIXTURE; AND (4) COMPRESSING SAID MIXTURE INTO TABLETS HAVING A LATTICE STRUCTURE WITH A CONTINUOUS INTERPHASE OF THE MEDICAMENT WITHIN THE INTERSTICES.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |