Patent US2094636A successfully refreshed from Google Patents.
US2292808A
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US
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Manufacture of heterocyclic compounds
Assignee: Individual
•
Filing: 1940-08-23
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Granted: 1942-08-11
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Expires: 1960-08-23
Abstract
No abstract record available.
Inventors
- 👤 Henry C Waterman
- 👤 Washington Donald L Vivian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:07
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/36; C07D241/38; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/86; C07D219/00; C07D219/02; C07D235/00; C07D235/02; C07D235/04; C07D235/06; C07D235/08; C07D241/46; C07D265/00; C07D265/28; C07D265/34; C07D265/38; C07D487/00; C07D487/02; C07D487/06
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) | 1945-08-10 | 1946-02-09 | 1946-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-10 | 1950-02-09 | 1950-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-10 | 1954-02-09 | 1954-08-11 | $7700.00 | Window Closed / Lapsed |