Patent US4081146A successfully refreshed from Google Patents.
Patent US2498165A successfully refreshed from Google Patents.
US2498165A
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Process for producing bacitracin
Assignee: Individual
•
Filing: 1946-05-29
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Granted: 1950-02-21
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Expires: 1966-05-29
Abstract
No abstract record available.
Inventors
- 👤 Balbina A Johnson
- 👤 Frank L Meleney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:14
CPC Classifications
C; C12; C12P; C12P21/00; C12P21/02; C12N; C12N1/00; C12N1/20; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/839; Y10S530/00; Y10S530/82; Y10S530/825
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING BACITRACIN PRECIPITATES COMPRISING CULTIVATING B. SUBTILIS TRACY I IN A CULTURE MEDIUM, EXTRACTING THE ANTITIOTIC FROM SAID RESULTING MEDIUM WITH A LOW MOLECULAR WEIGHT ALCOHOL, CONCENTRATING THE ALCOHOL EXTRACT IN VACUO IN THE PRESENCE OF WATER, ACIDIFYING THE CONCENTRATE AND EXTRACTING WTH A MIXTURE OF CHLOROFORM AND BUTANOL, AND PRECIPITATING THE ANTIBIOTIC FROM SAID RESULTING SOLUTION WITH A PRECIPITATING AGENT SELECTED FROM THE GROUP CONSISTING OF REINECKE''S SALT, PHOSPHOTUNGSTIC ACID, PHOSPHOMOLYBDIC ACID, MOLYBDIC ACID, PICRIC ACID, AMMONIUM RHODANILATE, AND AZOBENZENE-P-SULFONIC ACID.
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING BACITRACIN PRECIPITATES COMPRISING CULTIVATING B. SUBTILIS TRACY I IN A CULTURE MEDIUM, EXTRACTING THE ANTITIOTIC FROM SAID RESULTING MEDIUM WITH A LOW MOLECULAR WEIGHT ALCOHOL, CONCENTRATING THE ALCOHOL EXTRACT IN VACUO IN THE PRESENCE OF WATER, ACIDIFYING THE CONCENTRATE AND EXTRACTING WTH A MIXTURE OF CHLOROFORM AND BUTANOL, AND PRECIPITATING THE ANTIBIOTIC FROM SAID RESULTING SOLUTION WITH A PRECIPITATING AGENT SELECTED FROM THE GROUP CONSISTING OF REINECKE''S SALT, PHOSPHOTUNGSTIC ACID, PHOSPHOMOLYBDIC ACID, MOLYBDIC ACID, PICRIC ACID, AMMONIUM RHODANILATE, AND AZOBENZENE-P-SULFONIC ACID.
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) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |