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US4053474A
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Pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidine
Assignee: ER Squibb and Sons LLC
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Filing: 1976-04-21
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Granted: 1977-10-11
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Expires: 1996-04-21
Abstract
Abstract New pyrazolo[4,3-e][1,2,4]triazolo[4,3-c]pyrimidines have the general formula ##STR1## They are useful as antiinflammatory agents.
Inventors
- 👤 Uwe D. Treuner
- 👤 Hermann Breuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:30
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/38; A; A61; A61P; A61P29/00; C07D487/00; C07D487/02; C07D487/04; C07D487/12; C07D487/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
A compound of the formula ##STR30## wherein R 1 and R 2 each is hydrogen or lower alkyl; R 3 is hydrogen, alkali metal, alkaline earth metal, ##STR31## lower alkyl or mono-substituted lower alkyl wherein the lower alkyl substituent is hydroxy, cyano, phenyl, ##STR32## R 4 is lower alkyl or phenyl; R 5 and R 6 each is hydrogen or lower alkyl; and R 7 and R 8 each is hydrogen or lower alkyl.
Claim 2
Dependent Claim
74 words
A compound of the formula ##STR30## wherein R 1 and R 2 each is hydrogen or lower alkyl; R 3 is hydrogen, alkali metal, alkaline earth metal, ##STR31## lower alkyl or mono-substituted lower alkyl wherein the lower alkyl substituent is hydroxy, cyano, phenyl, ##STR32## R 4 is lower alkyl or phenyl; R 5 and R 6 each is hydrogen or lower alkyl; and R 7 and R 8 each is hydrogen or lower alkyl.
Claim 3
Dependent Claim
12 words
A compound as in claim 1 wherein R 3 is lower alkyl.
Claim 4
Dependent Claim
21 words
A compound as in claim 1 wherein R 1 and R 3 each is lower alkyl and R 2 is hydrogen.
Claim 5
Dependent Claim
16 words
A compound as in claim 1 wherein R 1 is methyl and R 2 is hydrogen.
Claim 6
Dependent Claim
12 words
A compound as in claim 4 wherein R 3 is lower alkyl.
Claim 7
Dependent Claim
11 words
A compound as in claim 4 wherein R 3 is ethyl.
Claim 8
Dependent Claim
11 words
A compound as in claim 4 wherein R 3 is methyl.
Claim 9
Dependent Claim
11 words
A compound as in claim 4 wherein R 3 is hydrogen.
Claim 10
Dependent Claim
12 words
A compound as in claim 4 wherein R 3 is hydroxy-lower alkyl.
Claim 11
Dependent Claim
11 words
A compound as in claim 4 wherein R 3 is hydroxypropyl.
References Cited (Backward Citations)
US3787430A
Cited
US3850932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |