Patent US950336A successfully refreshed from Google Patents.
Patent US3669950A successfully refreshed from Google Patents.
US3669950A
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DIPYRAZOLO{8 3,4-b:3,4d{9 -PYRIDIN-3-ONES
Assignee: ER Squibb and Sons LLC
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Filing: 1970-12-01
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Granted: 1972-06-13
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Expires: 1990-12-01
Abstract
Abstract New dipyrazolo(3,4-b:3'',4''-d)pyridin-3-ones and their salts are useful as central nervous system depressants. This type of compound also increases the intracellular concentration of adenosine-3'' ,5''-cyclic monophosphate.
Inventors
- 👤 Hans Hoehn
- 👤 Ernest Schulze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:44
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; C07D471/12; C07D471/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
5 words
A compound of the formula
Claim 2
Dependent Claim
18 words
A compound as in claim 1 wherein R1 is lower alkyl and R2 and R3 each is hydrogen.
Claim 3
Dependent Claim
13 words
A compound as in claim 2 wherein the lower alkyl group is ethyl.
Claim 4
Dependent Claim
18 words
A compound as in claim 1 wherein R1 and R3 each is lower alkyl and R2 is hydrogen.
Claim 5
Dependent Claim
17 words
A compound as in claim 1 wherein R1 is ethyl, R2 is hydrogen and R3 is methyl.
Claim 6
Dependent Claim
19 words
A compound as in claim 1 wherein R1 is lower alkyl, R2 is hydrogen and R3 is hydroxy-lower alkyl.
Claim 7
Dependent Claim
20 words
A compound as in claim 7 wherein the lower alkyl group is ethyl and the hydroxy-lower alkyl group is hydroxyethyl.
Claim 8
Dependent Claim
17 words
A compound as in claim 1 wherein R1 is phenyl-lower Alkyl, R2 and R3 each is hydrogen.
Claim 9
Dependent Claim
13 words
A compound as in claim 9 wherein the phenyl-lower alkyl group is benzyl.
Claim 10
Dependent Claim
18 words
A compound as in claim 2 wherein R1 is lower alkyl, R2 is hydrogen and R4 is phenyl.
Claim 11
Dependent Claim
13 words
A compound as in claim 11 wherein the lower alkyl group is ethyl.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |