Patent US2437683A successfully refreshed from Google Patents.
US2437683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrimedine compounds and method of
Assignee: —
•
Filing: —
•
Granted: 1948-03-16
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Expires: 1965-03-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:35
CPC Classifications
C; C07; C07D; C07D403/00; C07D403/02; C07D403/04; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/46; C07D239/48; C07D239/49; C07D405/00; C07D405/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |