Patent US6356762B1 successfully refreshed from Google Patents.
US2422341A
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US
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Solvent extraction
Assignee: Phillips Petroleum Co
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Filing: 1944-12-26
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Granted: 1947-06-17
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Expires: 1964-12-26
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:51
CPC Classifications
C; C07; C07C; C07C321/00; C07C7/00; C07C7/04; C07C7/05; C07C7/08; C07C7/10; C07C7/11; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/22; C10G7/00; C10G7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2114852A
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US2369612A
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US2204903A
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US2212150A
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US2229665A
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US2347432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |