US3963712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-Halo-cephalosporins
Assignee: Meiji Seika Kaisha Ltd
•
Filing: 1973-04-11
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Granted: 1976-06-15
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Expires: 1993-04-11
Abstract
Abstract A novel ester of 7-acylamido-3-methyl-cepham-4-carboxylic acid derivative and a process for the preparation thereof which comprises reacting penicillin sulfoxide ester with the metal halide, and a novel 7-acylamido-3-methyl-cepham-4-carboxylic acid derivative and a process for the preparation thereof which comprises reacting penicillin sulfoxide ester with the metal halide and decomposing the resultant in a reductive atmosphere.
Inventors
- 👤 Masao Koyama
- 👤 Shigeo Seki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:59
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/02; C07D501/08; C07D501/10; A; A61; A61P; A61P31/00; A61P31/04; C07D501/14
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
29 words
A compound of the formula: ##SPC8## wherein R 1 represents benzyl or phenoxymethyl, R 2 represents hydrogen, methyl, benzyl, p-nitrobenzyl or 2,2,2-trichloroethyl, and X is chlorine, bromine or iodine.
Claim 2
Dependent Claim
29 words
A compound of the formula: ##SPC8## wherein R 1 represents benzyl or phenoxymethyl, R 2 represents hydrogen, methyl, benzyl, p-nitrobenzyl or 2,2,2-trichloroethyl, and X is chlorine, bromine or iodine.
Claim 3
Dependent Claim
3 words
7-phenoxyacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid methylester.
Claim 4
Dependent Claim
3 words
7-phenoxyacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid methylester.
Claim 5
Dependent Claim
3 words
7-phenoxyacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid benzylester.
Claim 6
Dependent Claim
3 words
7-phenoxyacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid benzylester.
Claim 7
Dependent Claim
3 words
7-phenoxyacetoamido-3-chloro-3-cepham-4-carboxylic acid p-nitrobenzylester.
Claim 8
Dependent Claim
3 words
7-phenoxyacetoamido-3-chloro-3-cepham-4-carboxylic acid p-nitrobenzylester.
Claim 9
Dependent Claim
3 words
7-phenoxyacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid 2,2,2-trichloroethylester.
Claim 10
Dependent Claim
3 words
7-phenoxyacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid 2,2,2-trichloroethylester.
Claim 11
Dependent Claim
3 words
7-phenoxyacetoamido-3-iodo-3-methyl-cepham-4-carboxylic acid methylester.
Claim 12
Dependent Claim
3 words
7-phenoxyacetoamido-3-iodo-3-methyl-cepham-4-carboxylic acid methylester.
Claim 13
Dependent Claim
3 words
7-phenoxyacetoamido-3-iodo-3-methyl-cepham-4-carboxylic acid p-nitrobenzylester.
Claim 14
Dependent Claim
3 words
7-phenoxyacetoamido-3-iodo-3-methyl-cepham-4-carboxylic acid p-nitrobenzylester.
Claim 15
Dependent Claim
3 words
7-phenoxyacetoamido-3-bromo-3-methyl-cepham-4-carboxylic acid methylester.
Claim 16
Dependent Claim
3 words
7-phenoxyacetoamido-3-bromo-3-methyl-cepham-4-carboxylic acid methylester.
Claim 17
Dependent Claim
3 words
7-phenylacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid methylester.
Claim 18
Dependent Claim
3 words
7-phenylacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid methylester.
Claim 19
Dependent Claim
3 words
7-phenylacetoamido-3-iodo-3-methyl-cepham-4-carboxylic acid methylester.
Claim 20
Dependent Claim
3 words
7-phenylacetoamido-3-iodo-3-methyl-cepham-4-carboxylic acid methylester.
Claim 21
Dependent Claim
2 words
7-phenoxyacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid.
Claim 22
Dependent Claim
2 words
7-phenoxyacetoamido-3-chloro-3-methyl-cepham-4-carboxylic acid.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |