Patent US2398003A successfully refreshed from Google Patents.
US2398003A
Expired / Lapsed
US
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Acidyl 4-thiobiurets and process of making them
Assignee: Wyeth Holdings LLC
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Filing: 1943-06-07
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Granted: 1946-04-09
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Expires: 1963-06-07
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Hill
- 👤 William M Degnan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:50
CPC Classifications
C; C07; C07C; C07C335/00; C07C335/04; C07C335/24; C07C335/28
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) | 1949-04-08 | 1949-10-08 | 1950-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-08 | 1953-10-08 | 1954-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-08 | 1957-10-08 | 1958-04-09 | $7700.00 | Window Closed / Lapsed |