US2611731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antibiotic preparations
Assignee: Parke Davis and Co LLC
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Filing: 1946-09-03
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Granted: 1952-09-23
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Expires: 1966-09-03
Abstract
No abstract record available.
Inventors
- 👤 Albert L Rawlins
- 👤 James A Sultzaberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:29
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A CLEAR, ESSENTIALLY AQUEOUS ANTIBIOTIC CONCENTRATE COMPRISING AN ANTIBIOTIC SELECTED FROM THE CLASS CONSISTING OF TYROTHRICIN AND ONE OF ITS THERAPEUTICALLY ACTIVE COMPONENTS AND AS A SOLUBILIZER THEREFOR A WATER-SOLUBLE SALT OF AN ORGANIC QUATERNARY AMMONIUM COMPOUND HAVING THREE LOWER ALKYL GROUPS AND ONE LONG CHAIN ALAKYL GROUP ALL ATTACHED DIRECTLY TO THE PENTAVALENT NITROGEN ATOM, IN WHICH THE LOWER ALKYL GROUPS EACH CONTAIN NO MORE THAN TWO CARBON ATOMS; SAID CONCENTRATE YIELDING ON DILUTION WITH AN AQUEOUS SOLVENT A CLEAR, STABLE SOLUTION CONTAINING THE ANTIBIOTIC IN A CONCENTRATION GREATER THAN ITS SOLUBILITY IN AN OTHERWISE IDENTICAL SOLUTION NOT CONTAINING THE SOLUBILIZER, SAID CONCENTRATION BEING SUFFICIENT TO MANIFEST ANTIBIOTIC ACTIVITY.
Claim 2
Dependent Claim
110 words
A CLEAR, ESSENTIALLY AQUEOUS ANTIBIOTIC CONCENTRATE COMPRISING AN ANTIBIOTIC SELECTED FROM THE CLASS CONSISTING OF TYROTHRICIN AND ONE OF ITS THERAPEUTICALLY ACTIVE COMPONENTS AND AS A SOLUBILIZER THEREFOR A WATER-SOLUBLE SALT OF AN ORGANIC QUATERNARY AMMONIUM COMPOUND HAVING THREE LOWER ALKYL GROUPS AND ONE LONG CHAIN ALAKYL GROUP ALL ATTACHED DIRECTLY TO THE PENTAVALENT NITROGEN ATOM, IN WHICH THE LOWER ALKYL GROUPS EACH CONTAIN NO MORE THAN TWO CARBON ATOMS; SAID CONCENTRATE YIELDING ON DILUTION WITH AN AQUEOUS SOLVENT A CLEAR, STABLE SOLUTION CONTAINING THE ANTIBIOTIC IN A CONCENTRATION GREATER THAN ITS SOLUBILITY IN AN OTHERWISE IDENTICAL SOLUTION NOT CONTAINING THE SOLUBILIZER, SAID CONCENTRATION BEING SUFFICIENT TO MANIFEST ANTIBIOTIC ACTIVITY.
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) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |