Patent US3256283A successfully refreshed from Google Patents.
US3256283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 4, 7-triamino-6-(2, 6-disubstituted phenyl) pteridines
Assignee: Wyeth LLC
•
Filing: 1965-03-19
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Granted: 1966-06-14
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Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas S Osdene
- 👤 Peter B Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:42
CPC Classifications
C; C07; C07D; C07D475/00; C07D475/06; C07D475/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) A COMPOUND HAVING THE FORMULA:
References Cited (Backward Citations)
US3081230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |