Patent US2647858A successfully refreshed from Google Patents.
US2647858A
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Oil decolorization method
Assignee: ExxonMobil Oil Corp
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Filing: 1950-08-23
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Granted: 1953-08-04
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Expires: 1970-08-23
Abstract
No abstract record available.
Inventors
- 👤 Paul B Weisz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:25
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/06; C10G29/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
53 words
A METHOD FOR REMOVING COLOR BODIES FROM A PETROLEUM LUBRICATING OIL CONTAINING THE SAME WHICH COMPRISES CONTACTING SAID OIL WITH A SOLID WATER-INSOLUBLE INORGANIC METAL FLUORIDE, SEPARATING THE OIL SO TREATED FROM SAID FLUORIDE AND REGENERATING THE SPENT FLUORIDE FOR FURTHER CONTACT WITH UNTREATED OIL BY ELUTRIATION THEREOF WITH AN ORGANIC POLAR SOLVENT.
References Cited (Backward Citations)
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US2333648A
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US2333649A
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US2341567A
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US2463077A
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US2413868A
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US2459434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |