US2897120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low viscosity cmc pharmaceutical vehicle
Assignee: Pharmacia and Upjohn Co
•
Filing: 1954-05-04
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Granted: 1959-07-28
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Expires: 1974-05-04
Abstract
No abstract record available.
Inventors
- 👤 John P Cronin
- 👤 Arnold J Hennig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:54
CPC Classifications
A; A61; A61K; A61K47/00; A61K47/30; A61K47/32; A61K31/00; A61K31/33; A61K31/395; A61K31/41; A61K31/425; A61K31/429; A61K31/43; A61K47/36; A61K47/38; A61K9/00; A61K9/0012; A61K9/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
AN AQUEOUS VEHICLE FOR INSOLUBLE MEDICINAL AGENTS COMPRISING ABOUT 0.1 TO ABOUT ONE PERCENT OF A LOW VISCOSITY ALKALINE SALT OF CARBOXYMETHYLCELLULOSE AND ABOUT 0.1 TO ABOUT THREE PERCENT OF A HYDROPHILIC POLYVINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYVINYL PYRROLIDONE AND POLYVINYL ALCOHOL.
Claim 2
Dependent Claim
45 words
AN AQUEOUS VEHICLE FOR INSOLUBLE MEDICINAL AGENTS COMPRISING ABOUT 0.1 TO ABOUT ONE PERCENT OF A LOW VISCOSITY ALKALINE SALT OF CARBOXYMETHYLCELLULOSE AND ABOUT 0.1 TO ABOUT THREE PERCENT OF A HYDROPHILIC POLYVINYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF POLYVINYL PYRROLIDONE AND POLYVINYL ALCOHOL.
References Cited (Backward Citations)
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Cited
US2793156A
Cited
US2650217A
Cited
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Cited
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Cited
FR1060811A
Cited
US2741573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |