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US2444582A
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Selective solvent treatment of liquid hydrocarbon mixtures for segregation of contained aromatics
Assignee: Blaw Knox Co
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Filing: 1944-01-20
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Granted: 1948-07-06
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Expires: 1964-01-20
Abstract
No abstract record available.
Inventors
- 👤 Allen S Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:53
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB439674A
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US2056830A
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GB456958A
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US2091078A
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US2215915A
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US2241430A
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US2243873A
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US2302383A
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US2246297A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |