US2805977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sustained release pharmaceutical preparation
Assignee: Smith Kline & French Laboratories Ltd
•
Filing: 1955-01-04
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Granted: 1957-09-10
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Expires: 1975-01-04
Abstract
No abstract record available.
Inventors
- 👤 Manford J Robinson
- 👤 Edward V Svedres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:18
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0087; A61K9/0095; A61K9/14; A61K9/16; A61K9/1605; A61K9/1617; A61K9/48; A61K9/50; A61K9/5005; A61K9/5015
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
AN ORAL LIQUID MEDICINAL PREPARATION PROVIDING THE SUSTAINED RELEASE OF SOLID MEDICAMENT COMPRISING MEDICINAL PARTICLES COMPRISING FINELY DIVIDED MEDICAMENT HAVING A MAXIMUM PARTICLE SIZE OF 200 MESH DISPERSED IN SOLID TIME DELAY MATERIAL RESISTANT TO DISINTEGRATION IN THE GASTRO-INTESTINAL TRACT AND PROVIDING FOR THE GRADUAL RELEASE OF THE MEDICAMENT IN SAID TRACT, SAID SOLID TIME DELAY MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF A WAX FATTY ALCOHOL OF FROM 14 TO 31 CARBON ATOMS, A GLYCERYL ESTER, OF A FATTY ACID HAVING FROM 10 TO 22 CARBON ATOMS, A CELLULOSE ETHER, AND A CELLULOSE ESTER AND SAID PARTICLES BEING NOT LARGER THAN 100 MESH AND AN AQUEOUS VEHICLE FOR SAID PARTICLES.
Claim 2
Dependent Claim
112 words
AN ORAL LIQUID MEDICINAL PREPARATION PROVIDING THE SUSTAINED RELEASE OF SOLID MEDICAMENT COMPRISING MEDICINAL PARTICLES COMPRISING FINELY DIVIDED MEDICAMENT HAVING A MAXIMUM PARTICLE SIZE OF 200 MESH DISPERSED IN SOLID TIME DELAY MATERIAL RESISTANT TO DISINTEGRATION IN THE GASTRO-INTESTINAL TRACT AND PROVIDING FOR THE GRADUAL RELEASE OF THE MEDICAMENT IN SAID TRACT, SAID SOLID TIME DELAY MATERIAL BEING SELECTED FROM THE GROUP CONSISTING OF A WAX FATTY ALCOHOL OF FROM 14 TO 31 CARBON ATOMS, A GLYCERYL ESTER, OF A FATTY ACID HAVING FROM 10 TO 22 CARBON ATOMS, A CELLULOSE ETHER, AND A CELLULOSE ESTER AND SAID PARTICLES BEING NOT LARGER THAN 100 MESH AND AN AQUEOUS VEHICLE FOR SAID PARTICLES.
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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |