Patent US2365898A successfully refreshed from Google Patents.
US2365898A
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Solvent extraction process
Assignee: Shell Development Co
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Filing: 1943-10-19
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Granted: 1944-12-26
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Expires: 1963-10-19
Abstract
No abstract record available.
Inventors
- 👤 Rupert C Morris
- 👤 Norten C Melchior
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:17
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/46; C07D333/48; B; B01; B01D; B01D11/00; B01D11/04; B01D3/00; B01D3/34; B01D3/40; C07C; C07C315/00; C07C315/06; C07C7/00; C07C7/10; 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)
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) | 1947-12-26 | 1948-06-26 | 1948-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-12-26 | 1952-06-26 | 1952-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-12-26 | 1956-06-26 | 1956-12-26 | $7700.00 | Window Closed / Lapsed |