US3242178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 4-diamino-6-hydroxymethyl-7, 8-dihydropteridine
Assignee: SmithKline Beecham Corp
•
Filing: 1963-08-20
•
Granted: 1966-03-22
•
Expires: 1983-08-20
Abstract
No abstract record available.
Inventors
- 👤 Gertrude B Elion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:10
CPC Classifications
C; C07; C07D; C07D475/00; C07D475/06; C07D475/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2667485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |