US3065143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release tablet
Assignee: Richardson Vicks Inc
•
Filing: 1960-04-19
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Granted: 1962-11-20
•
Expires: 1980-04-19
Abstract
No abstract record available.
Inventors
- 👤 George L Christenson
- 👤 Lamar B Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:04
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/20; A61K9/2004; A61K9/2022; A61K9/205; A61K9/2054; A61K9/2027
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A COMPRESSED TABLET FOR ORAL ADMINISTRATION WHICH IS CHARACTERIZED BY ITS ABILITY TO RESIST SPONTANEOUS DISINTEGRATION AND TO RELEASE MEDICAMENT AT A SUBSTANTIALLY UNIFORM RATE OVER A PERIOD OF AT LEAST FOUR HOURS IN THE GASTRO-INTESTINAL TRACT WHICH TABLET CONSISTS ESSENTIALLY OF A COMPRESSED MIXTURE OF AN EFFECTIVE AMOUNT OF A MEDICAMENT AND AT LEAST ONE-THIRD PART BY WEIGHT OF THE WEIGHT OF THE TABLET OF A PHARMACEUTICALLY ACCEPTABLE HYDROPHILIC GUM WHICH RAPIDLY ABSORBS WATER AND SWELLS AT 37*C. TO FORM A SOFT MUCILAGINOUS GEL BARRIER ON THE SURFACE OF THE TABLET WHEN BROUGHT INTO CONTACT WITH THE AQUEOUS FLUIDS OF THE GASTRO-INTESTINAL TRACT WHICH PREVENTS RAPID DISINTEGRATION OF THE TABLET AND RELEASE OF THE MEDICAMENT CONTAINED THEREIN WHEN TAKEN ORALLY, BUT ALLOWS SLOW DISINTEGRATION OF THE TABLET AND RELEASE OF MEDICAMENT OVER A PERIOD OF AT LEAST FOUR HOURS.
Claim 2
Dependent Claim
140 words
A COMPRESSED TABLET FOR ORAL ADMINISTRATION WHICH IS CHARACTERIZED BY ITS ABILITY TO RESIST SPONTANEOUS DISINTEGRATION AND TO RELEASE MEDICAMENT AT A SUBSTANTIALLY UNIFORM RATE OVER A PERIOD OF AT LEAST FOUR HOURS IN THE GASTRO-INTESTINAL TRACT WHICH TABLET CONSISTS ESSENTIALLY OF A COMPRESSED MIXTURE OF AN EFFECTIVE AMOUNT OF A MEDICAMENT AND AT LEAST ONE-THIRD PART BY WEIGHT OF THE WEIGHT OF THE TABLET OF A PHARMACEUTICALLY ACCEPTABLE HYDROPHILIC GUM WHICH RAPIDLY ABSORBS WATER AND SWELLS AT 37*C. TO FORM A SOFT MUCILAGINOUS GEL BARRIER ON THE SURFACE OF THE TABLET WHEN BROUGHT INTO CONTACT WITH THE AQUEOUS FLUIDS OF THE GASTRO-INTESTINAL TRACT WHICH PREVENTS RAPID DISINTEGRATION OF THE TABLET AND RELEASE OF THE MEDICAMENT CONTAINED THEREIN WHEN TAKEN ORALLY, BUT ALLOWS SLOW DISINTEGRATION OF THE TABLET AND RELEASE OF MEDICAMENT OVER A PERIOD OF AT LEAST FOUR HOURS.
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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |