Patent US3335141A successfully refreshed from Google Patents.
US3335141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-substituted-1-alkyl-6-(5-nitro-2-furyl)-1h-pyrazolo[3, 4-d]pyrimidines
Assignee: Warner Chilcott Pharmaceuticals Inc
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Filing: 1964-08-17
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Granted: 1967-08-08
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Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Burch Homer Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:07
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA:
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) | 1970-08-07 | 1971-02-06 | 1971-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-07 | 1975-02-06 | 1975-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-07 | 1979-02-06 | 1979-08-08 | $7700.00 | Window Closed / Lapsed |