US2453333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction of biguanide and ethylene sulfide
Assignee: Wyeth Holdings LLC
•
Filing: 1942-09-19
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Granted: 1948-11-09
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Expires: 1962-09-19
Abstract
No abstract record available.
Inventors
- 👤 Leonard P Moore
- 👤 Walter P Ericks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:10
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C08G75/06; C08G75/08; C07; C07C; C07C323/00; C07C323/23; C07C323/39; C07C323/43; C07C323/44; C14; C14C; C14C1/00; C14C1/06
Claims Analysis
Total Claims: 0
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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) | 1951-11-09 | 1952-05-10 | 1952-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-09 | 1956-05-10 | 1956-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-09 | 1960-05-10 | 1960-11-09 | $7700.00 | Window Closed / Lapsed |