US2796381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Repository vegetable oil, ethyl cellulose, tetracycline-type antibiotic composition
Assignee: Wyeth Holdings LLC
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Filing: 1955-06-22
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Granted: 1957-06-18
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Expires: 1975-06-22
Abstract
No abstract record available.
Inventors
- 👤 Borst Wilbur Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
AN ANHYDROUS STERILE REPOSITORY COMPOSITION COMPRISING A VEGETABLE OIL, ETHYL CELLULOSE, AND AN ANTIBIOTIC SELECTED FROM THE GROUP CONSISTING OF CHLORTETRACYCLINE, TETRACYCLINE, BROMOTETRACYCLINE, AND THEIR ACID AND BASIC SALTS, SAID ETHYL CELLULOSE HAVING BEEN DISSOLVED IN SAID VEGETABLE OIL AT A TEMPERATURE IN THE RANGE OF 180*-205* C. SO AS TO FORM A VISCOUS GEL IN SAID VEGETABLE OIL.
Claim 2
Dependent Claim
59 words
AN ANHYDROUS STERILE REPOSITORY COMPOSITION COMPRISING A VEGETABLE OIL, ETHYL CELLULOSE, AND AN ANTIBIOTIC SELECTED FROM THE GROUP CONSISTING OF CHLORTETRACYCLINE, TETRACYCLINE, BROMOTETRACYCLINE, AND THEIR ACID AND BASIC SALTS, SAID ETHYL CELLULOSE HAVING BEEN DISSOLVED IN SAID VEGETABLE OIL AT A TEMPERATURE IN THE RANGE OF 180*-205* C. SO AS TO FORM A VISCOUS GEL IN SAID VEGETABLE OIL.
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) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |