US3795707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of alpha-6-deoxytetracyclines
Assignee: ANGUS BIOTECH Inc A CORP OF DE
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Filing: 1970-12-28
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Granted: 1974-03-05
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Expires: 1990-12-28
Abstract
Abstract A-6-DEOXTTETRACYCLINES ARE RECOVERED IN PURIFIED FORM BY REACTING THE CORRESPONDING A-6-DEOXYTETRACYCLINE SULFOSALICYLATES WITH AT LEAST ABOUT TWO EQUIVALENTS OF A BASE AT A PH OF ABOUT 5.5 TO ABOUT 9.0 AND AT A TEMPERATURE OF LESS THAN ABOUT 90*C.
Inventors
- 👤 F Luciano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/65; C; C07; C07C; C07C231/00; C07C231/12; C07C237/00; C07C237/24; C07C237/26; B; B01; B01J; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2231/645; C07C2603/00; C07C2603/02; C07C2603/40; C07C2603/42; C07C2603/44; C07C2603/46
Claims Analysis
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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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |