US2739924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of tetracycline
Assignee: Bristol Laboratories Inc
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Filing: 1953-12-04
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Granted: 1956-03-27
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Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Lein Joseph
- 👤 Gourevitch Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:43
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/20; C12N1/205; C12P; C12P29/00; C12R; C12R2001/00; C12R2001/01; C12R2001/465; C12R2001/485; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/889
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR THE PRODUCTION OF TETRACYLINE WHICH COMPRISES GROWING UNDER AEROBIC CONDITIONS A CULTURE OF A CHLORTETRACYCLINE-PRODUCING SPECIES OF STREPTOMYCES SELECTED FROM THE GROUP CONSISTING OF STREPTOMYCES VIRIDIFACIENS AND STREPTOMYCES AUREOFACIENS IN AN AQUEOUS NITROGENOUS NUTRIENT CONTAINING, CARBOHYDRATE SOLUTION CONTAINING A SUBSTANTIAL AMOUNT OF CHLORIDE ION UNDER SUBMERGED AEROBIC CONDITIONS IN THE PRESENCE OF ADDED AMOUNTS OF ABOUT 0.01 TO 5.0 PER CENT BY WEIGHT OF THE MEDIUM OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF BROMIDE, IODIDE, AND THIOCYANATE IONS UNTIL SUBSTANTIAL ANTIBACTERIAL ACTIVITY CAUSED PRIMARILY BY THE PRESENCE OF TETRACYCLINE IS IMPARTED TO SAID SOLUTION.
Claim 2
Dependent Claim
99 words
A PROCESS FOR THE PRODUCTION OF TETRACYLINE WHICH COMPRISES GROWING UNDER AEROBIC CONDITIONS A CULTURE OF A CHLORTETRACYCLINE-PRODUCING SPECIES OF STREPTOMYCES SELECTED FROM THE GROUP CONSISTING OF STREPTOMYCES VIRIDIFACIENS AND STREPTOMYCES AUREOFACIENS IN AN AQUEOUS NITROGENOUS NUTRIENT CONTAINING, CARBOHYDRATE SOLUTION CONTAINING A SUBSTANTIAL AMOUNT OF CHLORIDE ION UNDER SUBMERGED AEROBIC CONDITIONS IN THE PRESENCE OF ADDED AMOUNTS OF ABOUT 0.01 TO 5.0 PER CENT BY WEIGHT OF THE MEDIUM OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF BROMIDE, IODIDE, AND THIOCYANATE IONS UNTIL SUBSTANTIAL ANTIBACTERIAL ACTIVITY CAUSED PRIMARILY BY THE PRESENCE OF TETRACYCLINE IS IMPARTED TO SAID SOLUTION.
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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |