US2763590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bacttracin recovery
Assignee: Pfizer Inc
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Filing: 1954-05-21
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Granted: 1956-09-18
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Expires: 1974-05-21
Abstract
No abstract record available.
Inventors
- 👤 Merton G Gollaher
- 👤 Edward J Honohan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:42
CPC Classifications
C; C07; C07K; C07K7/00; C07K7/50; C07K7/54; C07K7/56; C07K7/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR THE RECOVERY OF BACITRACIN, WHICH COMPRISES FILTERING AN IMPURE AQUEOUS SOLUTION OF BACITRACIN CONTACTING THE FILTRATE AT A PH OF FROM ABOUT 1.5 TO ABOUT 4.0, WITH A SOLUBLE MOLYBDATE IN A PROPORTION EQUIVALENT TO AT LEAST 133 MG./100 ML. CALCULATED AS AMMONIUM MOLYBDATE, ADJUSTING THE THUS-PRODUCED BACITRACIN-MOLYBDATE IN WATER TO A PH OF AT LEAST 5.0, SOON THEREAFTER SEPARATING THE SO-PRODUCED AQUEOUS CONCENTRATE OF BACITRACIN AND EXTRACTING THE BACITRACIN SOLUTION WITH A PARTIALLY WATERMISCIBLE POLAR ORGANIC SOLVENT SELECTED FROM THE CLASS CONSISTING OF BUTANOLS, PENTANOLS, HEXANOLS, BENZYL ALCOHOL AND PHENOLS, AT A PH FROM ABOUT 6.0 TO ABOUT 8.5.
Claim 2
Dependent Claim
103 words
A PROCESS FOR THE RECOVERY OF BACITRACIN, WHICH COMPRISES FILTERING AN IMPURE AQUEOUS SOLUTION OF BACITRACIN CONTACTING THE FILTRATE AT A PH OF FROM ABOUT 1.5 TO ABOUT 4.0, WITH A SOLUBLE MOLYBDATE IN A PROPORTION EQUIVALENT TO AT LEAST 133 MG./100 ML. CALCULATED AS AMMONIUM MOLYBDATE, ADJUSTING THE THUS-PRODUCED BACITRACIN-MOLYBDATE IN WATER TO A PH OF AT LEAST 5.0, SOON THEREAFTER SEPARATING THE SO-PRODUCED AQUEOUS CONCENTRATE OF BACITRACIN AND EXTRACTING THE BACITRACIN SOLUTION WITH A PARTIALLY WATERMISCIBLE POLAR ORGANIC SOLVENT SELECTED FROM THE CLASS CONSISTING OF BUTANOLS, PENTANOLS, HEXANOLS, BENZYL ALCOHOL AND PHENOLS, AT A PH FROM ABOUT 6.0 TO ABOUT 8.5.
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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |