Patent US1572856A successfully refreshed from Google Patents.
Patent US2886595A successfully refreshed from Google Patents.
US2886595A
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Tetracycline recovery
Assignee: Bristol Laboratories Inc
•
Filing: 1958-09-30
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Granted: 1959-05-12
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Expires: 1978-09-30
Abstract
No abstract record available.
Inventors
- 👤 Heinemann Bernard
- 👤 Irving R Hooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:21
CPC Classifications
C; C07; C07C; C07C233/00; Y; Y10; Y10S; Y10S424/00; Y10S424/06; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR RECOVERING TETRACYCLINE FROM A FERMENTATION BROTH COMPRISING THE CONSECUTIVE STEPS OF ADJUSTING THE PH OF AN ACIDIC FERMENTATION BROTH TO A PH IN THE RANGE OF 8.5 TO 9.4 INCLUSIVE, EXTRACTING THE TETRACYCLINE WITH N-BUTANOL, SEPARATING THE N-BUTANOL AND RECOVERING THE TETRACYCLINE THEREFROM.
Claim 2
Dependent Claim
46 words
A PROCESS FOR RECOVERING TETRACYCLINE FROM A FERMENTATION BROTH COMPRISING THE CONSECUTIVE STEPS OF ADJUSTING THE PH OF AN ACIDIC FERMENTATION BROTH TO A PH IN THE RANGE OF 8.5 TO 9.4 INCLUSIVE, EXTRACTING THE TETRACYCLINE WITH N-BUTANOL, SEPARATING THE N-BUTANOL AND RECOVERING THE TETRACYCLINE THEREFROM.
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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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |