Patent US2709204A successfully refreshed from Google Patents.
US2696458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deasphalting operation
Assignee: Standard Oil Development Co
•
Filing: 1952-02-27
•
Granted: 1954-12-07
•
Expires: 1972-02-27
Abstract
No abstract record available.
Inventors
- 👤 Barney R Strickland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:35
CPC Classifications
C; C10; C10G; C10G55/00; C10G55/02; C10G55/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A PROCESS FOR THE REMOVAL OF ASPHALTIC CONSTITUENTS FROM RESIDUAL OILS WHICH COMPRISES HEATING THE RESIDUAL OIL AT A TEMPERATURE OF ABOUT 750* F. TO 920* F. AT A FEED RATE OF ABOUT 1-75 VOLUMES OF OIL PER HOUR PER VOLUME OF THE HEATING ZONE TO PROVIDE A TREATED PRODUCT CHARACTERIZED BY CONVERSION OF NO MORE THAN ABOUT 5% OF HYDROCARBONS BOILING IN THE RANGE BELOW 430* F., REMOVING THE SAID HYDROCARBONS BOILING BELOW ABOUT 430* F. BY FRACTIONATION, AND THEREAFTER TREATING THE RESIDUAL OIL WITH A DEASPHALTING SOLVENT UNDER CONDITIONS TO SEPARATE ASPHALTIC CONSTITUENTS FROM THE TREATED PRODUCT PROVIDING A TREATED RESIDUAL OIL CHARACTERIZED BY A VISCOSITY NOT SUBSTANTIALLY LOWER THAN THE ORIGINAL RESIDUAL OIL, AND A CONTENT OF INSOLUBLE MATERIAL IN 85* A. P. I. GRAVITY NAPHTHA APPROACHING THE CONRADSON CARBON CONTENT OF THE ORIGINAL RESIDUAL OIL.
Claim 2
Dependent Claim
139 words
A PROCESS FOR THE REMOVAL OF ASPHALTIC CONSTITUENTS FROM RESIDUAL OILS WHICH COMPRISES HEATING THE RESIDUAL OIL AT A TEMPERATURE OF ABOUT 750* F. TO 920* F. AT A FEED RATE OF ABOUT 1-75 VOLUMES OF OIL PER HOUR PER VOLUME OF THE HEATING ZONE TO PROVIDE A TREATED PRODUCT CHARACTERIZED BY CONVERSION OF NO MORE THAN ABOUT 5% OF HYDROCARBONS BOILING IN THE RANGE BELOW 430* F., REMOVING THE SAID HYDROCARBONS BOILING BELOW ABOUT 430* F. BY FRACTIONATION, AND THEREAFTER TREATING THE RESIDUAL OIL WITH A DEASPHALTING SOLVENT UNDER CONDITIONS TO SEPARATE ASPHALTIC CONSTITUENTS FROM THE TREATED PRODUCT PROVIDING A TREATED RESIDUAL OIL CHARACTERIZED BY A VISCOSITY NOT SUBSTANTIALLY LOWER THAN THE ORIGINAL RESIDUAL OIL, AND A CONTENT OF INSOLUBLE MATERIAL IN 85* A. P. I. GRAVITY NAPHTHA APPROACHING THE CONRADSON CARBON CONTENT OF THE ORIGINAL RESIDUAL OIL.
References Cited (Backward Citations)
US2160814A
Cited
US2528586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |