Patent US5729541A successfully refreshed from Google Patents.
Patent US2578533A successfully refreshed from Google Patents.
US2731391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cloud point reduction of mineral
Assignee: —
•
Filing: —
•
Granted: 1956-01-17
•
Expires: 1973-01-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:16
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/24; C10G25/00; C10G25/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
METHOD FOR THE REDUCTION OF THE NORMALLY RELATIVELY HIGH CLOUD POINT OF A MINERAL WHITE OIL. THE CLOUD POINT OF WHICH IS DUE TO THE LESS THAN 1% OF WAX CONTAINED THEREIN, WHICH COMPRISES INTIMATELY CONTACTING SUCH WHITE OIL WITH AN ADSORBENT CARRYING DISPERSED THERETHROUGH UREA, AT LEAST A PORTION OF WHICH IS IN ADSORBED CONDITION RESULTING FROM ALCOHOLIC UREA SOLUTION CONTACT, AND RECOVERING MINERAL WHITE OIL OF LOWER CLOUD POINT, SAID UREACARRYING ADSORBENT BEING PRESENT IN AMOUNT SUFFICIENT TO LOWER SAID CLOUD POINT AT LEAST 15* C.
Claim 2
Dependent Claim
88 words
METHOD FOR THE REDUCTION OF THE NORMALLY RELATIVELY HIGH CLOUD POINT OF A MINERAL WHITE OIL. THE CLOUD POINT OF WHICH IS DUE TO THE LESS THAN 1% OF WAX CONTAINED THEREIN, WHICH COMPRISES INTIMATELY CONTACTING SUCH WHITE OIL WITH AN ADSORBENT CARRYING DISPERSED THERETHROUGH UREA, AT LEAST A PORTION OF WHICH IS IN ADSORBED CONDITION RESULTING FROM ALCOHOLIC UREA SOLUTION CONTACT, AND RECOVERING MINERAL WHITE OIL OF LOWER CLOUD POINT, SAID UREACARRYING ADSORBENT BEING PRESENT IN AMOUNT SUFFICIENT TO LOWER SAID CLOUD POINT AT LEAST 15* C.
References Cited (Backward Citations)
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Cited
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Cited
US1278023A
Cited
US1509325A
Cited
US2381293A
Cited
US2560193A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |