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US3171836A
Expired / Lapsed
US
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2, 4, 7-triamino-n-(substituted)-6-pteridinecarboxamides
Assignee: Wyeth LLC
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Filing: 1962-11-02
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Granted: 1965-03-02
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Expires: 1982-11-02
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Osdene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:56
CPC Classifications
C; C07; C07D; C07D475/00; C07D475/06; C07D475/08
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)
US2963478A
Cited
US2975180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |