US3275626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penicillin conversion via sulfoxide
Assignee: Eli Lilly and Co
•
Filing: 1962-07-31
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Granted: 1966-09-27
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Expires: 1982-07-31
Abstract
No abstract record available.
Inventors
- 👤 Robert B Morin
- 👤 Billy G Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
C; C07; C07D; C07D499/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
62 words
A METHOD FOR CONVERTING THE THIAZOLIDINE RING OF A PENICILLIN INTO THE THIAZINE RING OF THE CEPHALOSPORINS WHICH COMPRISES HEATING A PENICILLIN SULFOXIDE ESTER IN AN INERT LIQUID AND IN THE PRESENCE OF A STRONG ACID AT A TEMPERATURE TURE BETWEEN ABOUT 125 AND ABOUT 150* C. FOR A TIME SUFFICIENT TO CAUSE SUBSTANTIAL CONVERSION THEREOF, AND RECOVERING THE RESULTING CEPHALOSPORIN COMPOUND.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |