US2813820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antibiotic compositions containing oxytetracycline and polymyxin
Assignee: Pfizer Inc
•
Filing: 1952-08-12
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Granted: 1957-11-19
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Expires: 1972-08-12
Abstract
No abstract record available.
Inventors
- 👤 Arthur R English
- 👤 Jasper H Kane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:35
CPC Classifications
C; C07; C07D; C07D499/00; A; A61; A61K; A61K31/00; A61K31/65; A61K38/00; A61K38/04; A61K38/12; A61K45/00; A61K45/06; A61K47/00; A61K47/06; A61K9/00; A61K9/0012; A61K9/0014; A61K2300/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A THERAPEUTICALLY EFFECTIVE COMPOSITION, WHICH CONTAINS AS THE PRINCIPAL ACTIVE INGREDIENTS BETWEEN I AND 20 PARTS BY WEIGHT OF AN OXYTETRACYCLINE ANTIBIOTIC TO ONEE PART BY WEIGHT OF A POLYMYXIN ANTIBIOTIC.
Claim 2
Dependent Claim
31 words
A THERAPEUTICALLY EFFECTIVE COMPOSITION, WHICH CONTAINS AS THE PRINCIPAL ACTIVE INGREDIENTS BETWEEN I AND 20 PARTS BY WEIGHT OF AN OXYTETRACYCLINE ANTIBIOTIC TO ONEE PART BY WEIGHT OF A POLYMYXIN ANTIBIOTIC.
References Cited (Backward Citations)
US2680701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |