US2457635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of regenerating aqueous alkali solution used to extract weakly acidic sulfur compounds from hydrocarbon fluids
Assignee: Pure Oil Co
•
Filing: 1945-10-10
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Granted: 1948-12-28
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Expires: 1965-10-10
Abstract
No abstract record available.
Inventors
- 👤 Donald C Bond
- 👤 Savoy Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:20
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; C01D1/28; C01D1/36; C10; C10G; C10G19/00; C10G19/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1827912A
Cited
US1943744A
Cited
US1964220A
Cited
US2015038A
Cited
US2148470A
Cited
US2315530A
Cited
US2369771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-12-28 | 1952-06-28 | 1952-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-28 | 1956-06-28 | 1956-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-28 | 1960-06-28 | 1960-12-28 | $7700.00 | Window Closed / Lapsed |