US2560193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehazing hydrocarbon oils
Assignee: Standard Oil Co
•
Filing: 1947-12-27
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Granted: 1951-07-10
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Expires: 1967-12-27
Abstract
No abstract record available.
Inventors
- 👤 Bernard H Shoemaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:25
CPC Classifications
C; C10; C10G; C10G29/00; C10G29/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN A PROCESS FOR REFINING A SUBSTANTIALLY WAXFREE PETROLEUM OIL OF SATISFACTORILY LOW POUR POINT WHICH DEVELOPS A VISIBLE HAZE ON BEING COOLED TO A LOW TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES INTIMATELY CONTACTING SAID OIL WITH UREA FOR A PERIOD OF TIME SUFFICIENT TO REACT THE ORGANIC HAZE-FORMING SUBSTANCES IN SAID OIL WITH SAID UREA, AND SEPARATING THE RESULTING UREA REACTION PRODUCT FROM SAID OIL, WHEREBY A HAZE-FREE OIL IS OBTAINED.
Claim 2
Dependent Claim
71 words
IN A PROCESS FOR REFINING A SUBSTANTIALLY WAXFREE PETROLEUM OIL OF SATISFACTORILY LOW POUR POINT WHICH DEVELOPS A VISIBLE HAZE ON BEING COOLED TO A LOW TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES INTIMATELY CONTACTING SAID OIL WITH UREA FOR A PERIOD OF TIME SUFFICIENT TO REACT THE ORGANIC HAZE-FORMING SUBSTANCES IN SAID OIL WITH SAID UREA, AND SEPARATING THE RESULTING UREA REACTION PRODUCT FROM SAID OIL, WHEREBY A HAZE-FREE OIL IS OBTAINED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |