Patent US2656581A successfully refreshed from Google Patents.
Patent US2943050A successfully refreshed from Google Patents.
US2943050A
Expired / Lapsed
US
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Solvent deasphalting
Assignee: Texaco Inc
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Filing: 1957-12-03
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Granted: 1960-06-28
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Expires: 1977-12-03
Abstract
No abstract record available.
Inventors
- 👤 David K Beavon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:17
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF TREATING AN ASPHALTIC OIL WHICH COMPRISES CONTACTING SAID OIL WITH A DEASPHALTING SOLVENT UNDER DEASPHALTING CONDITIONS OF TEMPERATURE AND PRESSURE TO EFFECT SEPARATION OF ASPHALTIC CONSTITUENTS FROM SAID OIL, RECOVERING FROM THE AFORESAID OPERATION A DEASPHALTED OIL MIX COMPRISING OIL HAVING A REDUCED AMOUNT OF ASPHALTIC CONSTITUENTS AND CONTAINING A PORTION OF SAID DEASPHALTING SOLVENT AND A LIQUID ASPHALT MIX CONTAINING ASPHALT ADMIXED WITH ANOTHER PORTION OF SAID DEASPHALTING SOLVENT, ADMIXING A RELATIVELY HIGH BOILING LIQUID PETROLEUM FRACTION WITH SAID ASPHALT MIX, HEATING THE RESULTING ADMIXTURE, TREATING THE RESULTING HEATED ADMIXTURE TO YIELD A VAPOR PHASE COMPRISING SUBSTANTIALLY ALL OF THE DEASPHALTING SOLVENT AND PETROLEUM FRACTION IN SAID ADMIXTURE AND INTRODUCING SAID VAPOR PHASE INTO SAID DEASPHALTED OIL MIX.
Claim 2
Independent Claim
122 words
A METHOD OF TREATING AN ASPHALTIC OIL WHICH COMPRISES CONTACTING SAID OIL WITH A DEASPHALTING SOLVENT UNDER DEASPHALTING CONDITIONS OF TEMPERATURE AND PRESSURE TO EFFECT SEPARATION OF ASPHALTIC CONSTITUENTS FROM SAID OIL, RECOVERING FROM THE AFORESAID OPERATION A DEASPHALTED OIL MIX COMPRISING OIL HAVING A REDUCED AMOUNT OF ASPHALTIC CONSTITUENTS AND CONTAINING A PORTION OF SAID DEASPHALTING SOLVENT AND A LIQUID ASPHALT MIX CONTAINING ASPHALT ADMIXED WITH ANOTHER PORTION OF SAID DEASPHALTING SOLVENT, ADMIXING A RELATIVELY HIGH BOILING LIQUID PETROLEUM FRACTION WITH SAID ASPHALT MIX, HEATING THE RESULTING ADMIXTURE, TREATING THE RESULTING HEATED ADMIXTURE TO YIELD A VAPOR PHASE COMPRISING SUBSTANTIALLY ALL OF THE DEASPHALTING SOLVENT AND PETROLEUM FRACTION IN SAID ADMIXTURE AND INTRODUCING SAID VAPOR PHASE INTO SAID DEASPHALTED OIL MIX.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |