US2763659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isonicotinoylhydrazones of 5-(oxoalkyl)-2-thiohydantoins and their preparation
Assignee: STWB Inc
•
Filing: 1954-09-20
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Granted: 1956-09-18
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Expires: 1974-09-20
Abstract
No abstract record available.
Inventors
- 👤 Archer Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:53
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/54; C07D233/66; C07D233/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
AN ISONICOTINOYLHYDRAZONE OF A 5-(OXOALKYL)-2-THIOHYDANTOIN, HAVING THE FORMULA
Claim 2
Dependent Claim
8 words
AN ISONICOTINOYLHYDRAZONE OF A 5-(OXOALKYL)-2-THIOHYDANTOIN, HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |