Patent US2863911A successfully refreshed from Google Patents.
US3225033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penicillin derivatives and process
Assignee: Bristol Myers Co
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Filing: 1961-04-24
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Granted: 1965-12-21
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Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 David A Johnson
- 👤 Jr Glenn A Hardcastle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:23
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; C07D499/00; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
13 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE ACIDS HAVING THE FORMULA
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |