US3835144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino derivatives of (4,3-c pyrazolopyridine cabroxylic acids and esters
Assignee: ER Squibb and Sons LLC
•
Filing: 1972-06-16
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Granted: 1974-09-10
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Expires: 1992-06-16
Abstract
Abstract New amino derivatives of pyrazolo(4,3-c)pyridine-7-carboxylic acids and esters have the general formula They are useful as ataractic, analgesic and anti-inflammatory agents. In addition, the new compounds increase the intracellular concentration of adenosine-3'',5''-cyclic monophosphate.
Inventors
- 👤 T Denzel
- 👤 H Hoehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:13
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80; C07D261/00; C07D261/02; C07D261/06; C07D261/10; C07D261/14; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
A compound as in claim 1 wherein R1, R4 and R5 each is hydrogen and R, R2 and R3 each is lower alkyl.
Claim 2
Dependent Claim
23 words
A compound as in claim 1 wherein R1 and R5 each is hydrogen and R, R2, R3 and R4 each is lower alkyl.
Claim 3
Dependent Claim
24 words
A compound as in claim 1 wherein R1, R4 and R5 each is hydrogen, R2 is methyl, R3 is butyl and R is ethyl.
Claim 4
Dependent Claim
24 words
A compound as in claim 1 wherein R, R3 and R4 each is ethyl, R2 is methyl and R1 and R5 each is hydrogen.
Claim 5
Dependent Claim
37 words
A compound as in claim 1 wherein R is hydrogen or lower alkyl, R1 is hydrogen or ethyl, R2 is methyl, R3 is ethyl, propyl or butyl, R4 is hydrogen and R5 is hydrogen, methyl or ethyl.
References Cited (Backward Citations)
US3755340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |