Patent US2612465A successfully refreshed from Google Patents.
US2612465A
Expired / Lapsed
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Separation of oil and wax by continuous filtration
Assignee: Texaco Development Corp
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Filing: 1948-06-29
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Granted: 1952-09-30
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Expires: 1968-06-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Wynkoop Kiersted
- 👤 Howard H Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:54
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN THE SEPARATION OF OIL AND WAX FROM MIXTURES THEREOF, SAID WAX COMPRISING BOTH NORMAL AND ISOPARAFFINIC CONSTITUENTS, THE METHOD COMPRISING CONTINUOUSLY PASSING A STREAM OF SAID OILWAX MIXTURE WITH SOLVENT LIQUID AT REDUCED TEMPERATURE IN THE RANGE OF ABOUT 0* F. AND BELOW TO A PRIMARY ZONE OF FILTRATION, EFFECTING SAID FILTRATION OF SAID MIXTURE OF REDUCED TEMPERATURE THEREBY FORMING A FILTRATE OF DEWAXED OIL DISSOLVED IN SOLVENT LIQUID AND A WAX CAKE COMPRISING SAID WAX, DISCHARGING SAID FILTRATE, REMOVING SAID WAX CAKE, SUBJECTING SAID REMOVED WAX TO FILTRATION IN THE PRESENCE OF SOLVENT, LIQUID AT A TEMPERATURE
Claim 2
Dependent Claim
99 words
IN THE SEPARATION OF OIL AND WAX FROM MIXTURES THEREOF, SAID WAX COMPRISING BOTH NORMAL AND ISOPARAFFINIC CONSTITUENTS, THE METHOD COMPRISING CONTINUOUSLY PASSING A STREAM OF SAID OILWAX MIXTURE WITH SOLVENT LIQUID AT REDUCED TEMPERATURE IN THE RANGE OF ABOUT 0* F. AND BELOW TO A PRIMARY ZONE OF FILTRATION, EFFECTING SAID FILTRATION OF SAID MIXTURE OF REDUCED TEMPERATURE THEREBY FORMING A FILTRATE OF DEWAXED OIL DISSOLVED IN SOLVENT LIQUID AND A WAX CAKE COMPRISING SAID WAX, DISCHARGING SAID FILTRATE, REMOVING SAID WAX CAKE, SUBJECTING SAID REMOVED WAX TO FILTRATION IN THE PRESENCE OF SOLVENT, LIQUID AT A TEMPERATURE
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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) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |