Patent US3755340A successfully refreshed from Google Patents.
US3755340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino derivatives of pyrazolopyridine carboxylic acids and esters
Assignee: Individual
•
Filing: 1971-08-05
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Granted: 1973-08-28
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Expires: 1991-08-05
Abstract
Abstract New amino derivatives of pyrazolo(3,4-b)pyridine-5-carboxylic acids and esters have the general formula THEY ARE USEFUL AS ATARACTIC, ANALGESIC AND ANTIINFLAMMATORY AGENTS. In addition, the new compounds increase the intracellular concentration of adenosine-3'',5''-cyclic monophosphate.
Inventors
- 👤 H Hoehn
- 👤 T Denzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:27
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/80; A; A61; A61P; A61P25/00; A61P25/04; A61P25/20; A61P29/00; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/38; C07D261/00; C07D261/02; C07D261/06; C07D261/10; C07D261/14; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
23 words
A compound as in claim 1 wherein R and R1 each is lower alkyl, and R2, R3, R4 and R5 each is hydrogen.
Claim 2
Dependent Claim
23 words
A compound as in claim 1 wherein R, R1 and R3 each is lower alkyl and R2, R4 and R5 each is hydrogen.
Claim 3
Dependent Claim
24 words
A compound as in claim 1 wherein R, R1, R3 and R4 each is lower alkyl, R2 is C1-C3 alkyl and R5 is hydrogen.
Claim 4
Dependent Claim
23 words
A compound as in claim 1 wherein R, R1, R3 and R4 each is lower alkyl and R2 and R5 each is hydrogen.
Claim 5
Dependent Claim
13 words
A compound as in claim 2 wherein each lower alkyl group is ethyl.
Claim 6
Dependent Claim
17 words
A compound as in claim 3 wherein R and R1 each is ethyl and R3 is butyl.
Claim 7
Dependent Claim
19 words
A compound as in claim 4 wherein R, R1, R3 and R4 each is ethyl and R2 is methyl.
Claim 8
Dependent Claim
13 words
A compound as in claim 5 wherein each lower alkyl group is ethyl.
Claim 9
Dependent Claim
17 words
A compound as in claim 3 wherein R is ethyl, R1 is methyl and R3 is butyl.
Claim 10
Dependent Claim
26 words
A compound as in claim 1 wherein R, and R3 each is lower alkyl and R1, R4 and R5 is hydrogen and R2 is C1-C3 alkyl.
Claim 11
Dependent Claim
17 words
A compound as in claim 11 wherein R is ethyl, R2 is methyl and R3 is butyl.
Claim 12
Dependent Claim
27 words
A compound as in claim 1 wherein R, R1, and R3 each is lower alkyl and R4 and R5 each is hydrogen and R2 is C1-C3 alkyl.
Claim 13
Dependent Claim
20 words
A compound as in claim 13 wherein R is ethyl, R1 and R2 each is methyl and R3 is butyl.
Claim 14
Dependent Claim
23 words
A compound as in claim 1 wherein R, R1, R3 and R5 each is lower alkyl and R2 and R4 each is hydrogen.
Claim 15
Dependent Claim
20 words
A compound as in claim 15 wherein R and R1 each is ethyl, R3 is butyl and R5 is methyl.
Claim 16
Dependent Claim
21 words
A compound as in claim 1 wherein R, R1, R2, R3 and R5 each is lower alkyl and R4 is hydrogen.
Claim 17
Dependent Claim
23 words
A compound as in claim 17 wherein R and R1 each is ethyl, R2 and R5 each is methyl and R3 is butyl.
Claim 18
Dependent Claim
21 words
A compound as in claim 1 wherein R, R1, R2, R4 and R5 each is hydrogen and R3 is lower alkanoyl.
Claim 19
Dependent Claim
10 words
A compound as in claim 1 wherein R5 is hydrogen.
Claim 20
Dependent Claim
42 words
A compound as in claim 1 wherein R is hydrogen or lower alkyl, R1 is hydrogen, methyl, ethyl or butyl, R2 is hydrogen or methyl, R3 is ethyl, propyl or butyl, R4 is hydrogen or ethyl and R5 is hydrogen or methyl.
Claim 21
Dependent Claim
23 words
A compound as in claim 20 wherein R is nonyl, R1 is ethyl, R2 and R4 each is hydrogen and R3 is butyl.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |