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US3755324A
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US
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3-(5-nitro-2-furyl)-1h-pyrazolo{8 3,4{9 pyrimidins-4(5h)-ones
Assignee: Novartis Corp
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Filing: 1970-10-27
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Granted: 1973-08-28
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Expires: 1990-10-27
Abstract
Abstract Compounds of the class of 3-(5-nitro-2-furyl)- 1H-pyrazolo(3,4d)pyrimidin-4(5H)-one have antimicrobial properties and are active ingredients in pharmaceutical compositions and animal feedstuff compositions, an illustrative example is 1,6-dimethyl3-(5-nitro-2-furyl)-1H-pyrazolo(3,4-d)pyrimidin-4(5H)-one.
Inventors
- 👤 W Hoyle
- 👤 G Howarth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:39
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
10 words
A compound according to claim 1 which is 1-methyl-3-(5-nitro-2-furyl)-1H-pyrazolo(3,4-d) pyrimidin-4(5H)-one.
Claim 2
Dependent Claim
9 words
A compound according to claim 1 which is 1-isopropyl-3-(5-nitro-2-furyl)-1H-pyrazolo(3,4-d)pyrimidin-4(5H)-one.
Claim 3
Dependent Claim
9 words
A compound according to claim 1 which is 3-(5-nitro-2-furyl)-1-n-pentyl-1H-pyrazolo(3,4-d)pyrimidin-4(5H)-one.
Claim 4
Dependent Claim
10 words
A compound according to claim 1 which is 1,6-dimethyl-3-(5-nitro-2-furyl)-1H-pyrazolo(3,4-d) pyrimidin-4(5H)-one.
Claim 5
Dependent Claim
10 words
A compound according to claim 1 which is 1-methyl-3-(5-nitro-2-furyl)-6-(1-propenyl)-1H-pyrazolo( 3,4-d)pyrimidin-4(5H)-one.
References Cited (Backward Citations)
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 |