US3445497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of alkali and alkaline earth metal alkyl carbonates and thiocarbonates
Assignee: Signal Oil and Gas Co
•
Filing: 1965-12-20
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Granted: 1969-05-20
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Expires: 1985-12-20
Abstract
No abstract record available.
Inventors
- 👤 John E Anderson
- 👤 Clyde E Parish
- 👤 George H Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:21
CPC Classifications
C; C12; C12G; C12G3/00; C12G3/005; A; A23; A23L; A23L2/00; A23L2/40; C07; C07C; C07C329/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2841525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |