US2645652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of oleiferous materials
Assignee: Standard Oil Co
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Filing: 1950-10-13
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Granted: 1953-07-14
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Expires: 1970-10-13
Abstract
No abstract record available.
Inventors
- 👤 Edward M B Pramuk
- 👤 Frederick H Maclaren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:39
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06; C11; C11B; C11B7/00; C11B7/0008; C11B7/0041
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF FRACTIONATING AN OLEIFEROUS MATERIAL WHICH COMPRISES DISSOLVING SAID MATERIAL IN ABOUT 10 TO 20 VOLUMES OF A TREATING AGENT HAVING A FREEZING POINT BELOW -60*F. AND CONSISTING ESSENTIALLY OF A LIGHT PARAFFINIC HYDROCARBON AND A LOW BOILING KETONE WITH THE RATIO OF PARAFFINIC HYDROCARBON TO LOW BOILING KETONE BEING IN THE RANGE OF 30:70 TO 90:10, COOLING THE RESULTING SOLUTION TO A TEMPERATURE OF APPROXIMATELY -50* TO -60*F. TO OBTAIN SOLIDS SEPARABLE BY FILTRATION SUSPENDED IN LIQUID TREATING AGENT CONTAINING UNSOLIDIFIED MATERIALS IN SOLUTION, FILTERING TO EFFECT SEPARATION OF THE SOLIDS FROM A
Claim 2
Independent Claim
96 words
THE METHOD OF FRACTIONATING AN OLEIFEROUS MATERIAL WHICH COMPRISES DISSOLVING SAID MATERIAL IN ABOUT 10 TO 20 VOLUMES OF A TREATING AGENT HAVING A FREEZING POINT BELOW -60*F. AND CONSISTING ESSENTIALLY OF A LIGHT PARAFFINIC HYDROCARBON AND A LOW BOILING KETONE WITH THE RATIO OF PARAFFINIC HYDROCARBON TO LOW BOILING KETONE BEING IN THE RANGE OF 30:70 TO 90:10, COOLING THE RESULTING SOLUTION TO A TEMPERATURE OF APPROXIMATELY -50* TO -60*F. TO OBTAIN SOLIDS SEPARABLE BY FILTRATION SUSPENDED IN LIQUID TREATING AGENT CONTAINING UNSOLIDIFIED MATERIALS IN SOLUTION, FILTERING TO EFFECT SEPARATION OF THE SOLIDS FROM A
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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |