Patent US3904618A successfully refreshed from Google Patents.
US3904618A
Expired / Lapsed
US
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7-substituted cephalosporin compounds
Assignee: Eli Lilly and Co
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Filing: 1973-12-26
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Granted: 1975-09-09
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Expires: 1993-12-26
Abstract
Abstract A new class of cephalosporin compounds having benzopyran, benzothiopyran, and derivatives thereof, in the side chain portion of the cephalosporin molecule.
Inventors
- 👤 Richard P Pioch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:18
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
5 words
THE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
THE COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
8 words
The compound of claim 1 wherein Q is
Claim 4
Dependent Claim
13 words
The compound of claim 2, said compound being 7-(6-chloro-2,3-dihydro-4-oxo-4H-1-benzothiopyran-2-ylcarboxamido)-3 -acetoxymethyl- Delta 3-cephem-4-carboxylic acid.
Claim 5
Dependent Claim
13 words
The compound of claim 2, said compound being 7-(6,7-dichloro-2,3-dihydro-4-oxo-4H-1-benzothiopyran-2-ylcarboxamido)-3 -acetoxymethyl- Delta 3-cephem-4-carboxylic acid.
Claim 6
Dependent Claim
13 words
The compound of claim 2, said compound being 7-(7-chloro-2,3-dihydro-4-oxo-4H-1-benzothiopyran-2ylcarboxamido)-3 -acetoxymethyl- Delta 3-cephem-4-carboxylic acid.
Claim 7
Dependent Claim
8 words
The compound of claim 1 wherein Q is
Claim 8
Dependent Claim
12 words
The compound of claim 6, said compound being 7-(6-chloro-4-oxo-4H-1-benzothiopyran-2-ylcarboxamido)-3-acetoxymethyl- Delta 3-cephem-4-carboxylic acid.
Claim 9
Dependent Claim
8 words
The compound of claim 1 wherein Q is
Claim 10
Dependent Claim
13 words
The compound of claim 8, said compound being 7-)2-(6-chloro-2,3-dihydro-4-oxo-4H-1-benzothiopyran-2yl)acetamido)-3 -acetoxymethyl- Delta 3-cephem-4-carboxylic acid.
References Cited (Backward Citations)
JPS4426106B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |