Patent US2878289A successfully refreshed from Google Patents.
US2878289A
Expired / Lapsed
US
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6-demethyltetracyclines and methods for preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1956-05-28
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Granted: 1959-03-17
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Mccormick Jerry Robert Daniel
- 👤 Jensen Elmer Raymond
- 👤 Sjolander Newell Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
C; C12; C12P; C12P29/00; C07; C07C; C07C233/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886; Y10S435/889
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
36 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 6-DEMETHYLTETRACYCLINE, 7-CHLORO-6-DEMETHYLTETRACYCLINE, 7-CHLORO - 6 - DEMETHYL-4-EPI-TETRACYCLINE, 7-BROMO-6-DEMETHYLTETRACYCLINE AND 7-BROMO-6-DEMETHYL-4- EPI-TETRACYCLINE, THE MINERAL ACID SALTS THEREOF, THE ALKALI METAL SALTS THEREOF, AND THE ALKALINE EARTH METAL SALTS THEREOF.
Claim 2
Dependent Claim
36 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 6-DEMETHYLTETRACYCLINE, 7-CHLORO-6-DEMETHYLTETRACYCLINE, 7-CHLORO - 6 - DEMETHYL-4-EPI-TETRACYCLINE, 7-BROMO-6-DEMETHYLTETRACYCLINE AND 7-BROMO-6-DEMETHYL-4- EPI-TETRACYCLINE, THE MINERAL ACID SALTS THEREOF, THE ALKALI METAL SALTS THEREOF, AND THE ALKALINE EARTH METAL SALTS THEREOF.
Claim 3
Dependent Claim
63 words
A PROCESS FOR PRODUCING 6-DEMETHYLTETRACYCLINE WHICH COMPRISES CULTIVATING A MICROORGANISM SELECTED FROM THE GROUP CONSISTING OF A 6-DEMETHYLTETRACYCLINEPRODUCING STRAIN OF STREPTOMYCES AUREOFACIENS AND MUTANTS THEREOF IN AN AQUEOUS NUTRIENT MEDIUM CONTAINING ASSIMILABLE SOURCES OF CARBOHYDRATE, NITROGEN AND INORGANIC SALTS AND BEING SUBSTANTIALLY FREE OF AVAILABLE CHLORIDE IONS, UNDER SUBMERGED AEROBIC CONDITIONS UNTIL SUBSTANTIAL ANTIBACTERIAL ACTIVITY DUE TO 6-DEMETHYLTETRACYCLINE IS IMPARTED TO SAID MEDIUM.
Claim 4
Dependent Claim
63 words
A PROCESS FOR PRODUCING 6-DEMETHYLTETRACYCLINE WHICH COMPRISES CULTIVATING A MICROORGANISM SELECTED FROM THE GROUP CONSISTING OF A 6-DEMETHYLTETRACYCLINEPRODUCING STRAIN OF STREPTOMYCES AUREOFACIENS AND MUTANTS THEREOF IN AN AQUEOUS NUTRIENT MEDIUM CONTAINING ASSIMILABLE SOURCES OF CARBOHYDRATE, NITROGEN AND INORGANIC SALTS AND BEING SUBSTANTIALLY FREE OF AVAILABLE CHLORIDE IONS, UNDER SUBMERGED AEROBIC CONDITIONS UNTIL SUBSTANTIAL ANTIBACTERIAL ACTIVITY DUE TO 6-DEMETHYLTETRACYCLINE IS IMPARTED TO SAID MEDIUM.
References Cited (Backward Citations)
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US2734018A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |