Patent US3944668A successfully refreshed from Google Patents.
US3944668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antimicrobial compositions
Assignee: Paterson Zochonis and Co Ltd
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Filing: 1974-03-29
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Granted: 1976-03-16
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Expires: 1994-03-29
Abstract
Abstract The stability of tetracycline is improved by compounding it with 8 - hydroxyquinoline or a chlorinated and/or alkyl derivative thereof. In the compositions, which are particularly suitable for topical application, the tetracycline and the quinoline derivative are shown to behave synergistically against certain micro-organisms.
Inventors
- 👤 David Frederick Cleaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:34
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/65
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A stable antimicrobial composition for topical or oral application comprising from 1 to 3% of tetracycline, from 1 to 3% of 5-chloro-8-hydroxyquinoline or 5,7-chloro-8-hydroxyquinoline and a pharmaceutically acceptable diluent or carrier.
Claim 2
Dependent Claim
31 words
A stable antimicrobial composition for topical or oral application comprising from 1 to 3% of tetracycline, from 1 to 3% of 5-chloro-8-hydroxyquinoline or 5,7-chloro-8-hydroxyquinoline and a pharmaceutically acceptable diluent or carrier.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |