US3350397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-amino-1-alkyl-6-(5-nitro-2-furyl)-1h-pyrazolo [3, 4-d] pyrimidines
Assignee: Warner Chilcott Pharmaceuticals Inc
•
Filing: 1965-07-20
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Granted: 1967-10-31
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Expires: 1985-07-20
Abstract
No abstract record available.
Inventors
- 👤 Burch Homer Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:18
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE COMPOUND 1-ETHYL-4-(3 - (MORPHOLINO)PROPYL) AMINO-6-(5-NITRO-2-FURYL)-1H-PYRAZOLO(3,4-D)PYRIMIDINE HYDROCHLORIDE OF THE FORMULA:
Claim 2
Dependent Claim
10 words
THE COMPOUND 4-(3 - HYDROXYPROPLYYAMINO) - 1METHYL-6-(5-NITRO-2-FURYL)-1''-PYRAZOLO(3,4-D)PYRIMIDINE OF THE FORMULA:
References Cited (Backward Citations)
GB937725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |