US2257283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent refining process
Assignee: Standard Oil Company of California
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Filing: 1937-10-18
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Granted: 1941-09-30
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Expires: 1957-10-18
Abstract
No abstract record available.
Inventors
- 👤 Alvah L Snow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:51
CPC Classifications
C; C10; C10G; C10G21/00; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; B01D3/00; B01D3/14; B01D3/16; B01D3/18; B01D3/20; B01D3/34; B01D3/40; C10G7/00; C10G7/08
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) | 1944-09-29 | 1945-03-31 | 1945-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-09-29 | 1949-03-31 | 1949-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-09-29 | 1953-03-31 | 1953-09-30 | $7700.00 | Window Closed / Lapsed |