US3737375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of 6-aminopenicillanic acid
Assignee: Sandoz GmbH
•
Filing: 1970-11-25
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Granted: 1973-06-05
•
Expires: 1990-11-25
Abstract
Abstract THE INVENTION CONCERNS A NOVEL CLEAVAGE PROCESS FOR THE PRODUCTION OF 6-AMINOPENICILLANIC ACID, WHICH COMPRISES CONTACTING A PENICILLIN OF THE FORMULA: 6-(R-CO-NH-),2-(HOOC-),3,3-DI(CH3-)PENAM WHEREIN R IS PHENOXYMETHYL, P-CRESOXYMETHYL OR NBUTOXYMETHYL, OR AN ALKALI METAL SALT OF SAID PENICILLIN, WITH PENICILLIN AMIDASE PRODUCED BY CULTURING UNDER AEROBIC CONDITIONS BOVISTA PLUMBEA (NNRL 3501) OR A MUTANT OR VARIANT THEREOF IN AN AQUEOUS MEDIUM CONTAINING ASSIMILABLE SOURCES OF CARBON AND NITROGEN.
Inventors
- 👤 E Brandl
- 👤 W Kleiber
- 👤 F Knauseder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:26
CPC Classifications
C; C07; C07D; C07D499/00; C07D499/21; C07D499/42; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911
Claims Analysis
Total Claims: 0
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |