US3284451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Activated esters of 7-amino-cephalosporanic acid
Assignee: Bristol Myers Co
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Filing: 1965-07-22
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Granted: 1966-11-08
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Expires: 1985-07-22
Abstract
No abstract record available.
Inventors
- 👤 Lee C Cheney
- 👤 John C Godfrey
- 👤 Jr Leonard B Crast
- 👤 Joyce R Luttinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:44
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/02; C01G23/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
ACTIVATED ESTERS OF 7-AMINOCEPHALOSPORANIC ACID OF THE FORMULA 2-(R-CH2-OOC-),3-(CH3-COO-CH2-),7-NH2-2-CEPHAM WHEREIN R REPRESENTS (LOWER) ALKANOYK, N-PHTHALIMIDO, BENZOYL, NAPHTHOYL, FURROYL, THENOYL, NITROBENZOYL, HALOBENZOYL, METHYLBENZOYL, METHANESULFONYLBENZOYL OR PHENYLBENZOYL; AND ACID ADDITION SALTS THEREOF.
Claim 2
Dependent Claim
30 words
ACTIVATED ESTERS OF 7-AMINOCEPHALOSPORANIC ACID OF THE FORMULA 2-(R-CH2-OOC-),3-(CH3-COO-CH2-),7-NH2-2-CEPHAM WHEREIN R REPRESENTS (LOWER) ALKANOYK, N-PHTHALIMIDO, BENZOYL, NAPHTHOYL, FURROYL, THENOYL, NITROBENZOYL, HALOBENZOYL, METHYLBENZOYL, METHANESULFONYLBENZOYL OR PHENYLBENZOYL; AND ACID ADDITION SALTS THEREOF.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |