Patent US3043877A successfully refreshed from Google Patents.
US3043877A
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Process for the 12a-hydroxylation of 12a-deoxytetracyclines
Assignee: Wyeth Holdings LLC
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Filing: 1960-10-28
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Granted: 1962-07-10
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Expires: 1980-10-28
Abstract
No abstract record available.
Inventors
- 👤 Chester E Holmlund
- 👤 William W Andres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:25
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
THE PROCESS FOR THE 12A-HYDROXYLATION OF 12A-DEOXYTETRACYCLINES WHICH COMPRISES CONTACTING A 12A-DEOXYTETRACYCLINES WITH AN INORGANIC OXIDIZING AGENT AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 50*C. AND AT A PH OF FROM ABOUT 2 TO ABOUT 7, SAID INORGANIC OXIDIZING AGENT BEING PRESENT IN THE REACTAION MIXTURE IN AMOUNTS RANGING FROM ABOUT ONE-EIGHTH TO ABOUT TWICE THE MOLAR CONCENTRATION OF ATHE 12A-DEOXYTETRACYCLINE.
Claim 2
Dependent Claim
63 words
THE PROCESS FOR THE 12A-HYDROXYLATION OF 12A-DEOXYTETRACYCLINES WHICH COMPRISES CONTACTING A 12A-DEOXYTETRACYCLINES WITH AN INORGANIC OXIDIZING AGENT AT A TEMPERATURE OF FROM ABOUT 0*C. TO ABOUT 50*C. AND AT A PH OF FROM ABOUT 2 TO ABOUT 7, SAID INORGANIC OXIDIZING AGENT BEING PRESENT IN THE REACTAION MIXTURE IN AMOUNTS RANGING FROM ABOUT ONE-EIGHTH TO ABOUT TWICE THE MOLAR CONCENTRATION OF ATHE 12A-DEOXYTETRACYCLINE.
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) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |