Patent US2895895A successfully refreshed from Google Patents.
US2895895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of carbon black oil
Assignee: Shell Development Co
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Filing: 1958-01-02
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Granted: 1959-07-21
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Expires: 1978-01-02
Abstract
No abstract record available.
Inventors
- 👤 Ridder Gysbert F De
- 👤 William P Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:53
CPC Classifications
C; C10; C10G; C10G9/00; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A PROCESS FOR THE PRODUCTION OF A HIGHLY AROMATIC BASE OIL SUITABLE FOR CARBON BLACK MANUFACTURE COMPRISING PREPARING A FEED MIXTURE CONTAINING SUBSTANTIAL PROPORTIONS OF A CATALYTICALLY CRACKED GAS OIL AND A STRAIGHT RUN AROMATIC EXTRACT, EACH OF SAID COMPONENTS HAVING AT LEAST 30% BY WEIGHT OF AROMATIC HYDROCARBONS AND WITH THE WEIGHT RATIO OF THE TWO COMPONENTS OF THE MIXTURE BEING BETWEEN 70-30 AND 30-70 AND WITH NEITHER OF SAID COMPONENTS HAVING BEEN SUBJECTED BEFORE PREPARATION OF THE FEED MIXTURE TO EITHER A SEPARATE HYDROGENATION OR A SEPARATE NON-CATALYTIC, THERMAL CRACKING, SUBJECTING THE MIXTURE TO A SEVERE THERMAL CRACKING OPERATION FOR A PERIOD OF TIME LESS THAN 30 MINUTES, AND SEPARATING THE LIGHTER MATERIAL IN A SUBSTANTIALLY ATMOSPHERIC PRESSURE SEPARATION FROM THE THERMALLY CRACKED MIXTURE TO OBTAIN A HIGHLY AROMATIC RESIDUE SUITABLE FOR CARBON BLACK MANUFACTURE AND HAVING OVERALL CARBON BLACK BASE OIL CHARACTERISTICS SUPERIOR TO THAT OBTAINABLE BY THE THERMAL CRACKLING OF EITHER OF THE COMPONENTS SEPARATELY.
Claim 2
Dependent Claim
159 words
A PROCESS FOR THE PRODUCTION OF A HIGHLY AROMATIC BASE OIL SUITABLE FOR CARBON BLACK MANUFACTURE COMPRISING PREPARING A FEED MIXTURE CONTAINING SUBSTANTIAL PROPORTIONS OF A CATALYTICALLY CRACKED GAS OIL AND A STRAIGHT RUN AROMATIC EXTRACT, EACH OF SAID COMPONENTS HAVING AT LEAST 30% BY WEIGHT OF AROMATIC HYDROCARBONS AND WITH THE WEIGHT RATIO OF THE TWO COMPONENTS OF THE MIXTURE BEING BETWEEN 70-30 AND 30-70 AND WITH NEITHER OF SAID COMPONENTS HAVING BEEN SUBJECTED BEFORE PREPARATION OF THE FEED MIXTURE TO EITHER A SEPARATE HYDROGENATION OR A SEPARATE NON-CATALYTIC, THERMAL CRACKING, SUBJECTING THE MIXTURE TO A SEVERE THERMAL CRACKING OPERATION FOR A PERIOD OF TIME LESS THAN 30 MINUTES, AND SEPARATING THE LIGHTER MATERIAL IN A SUBSTANTIALLY ATMOSPHERIC PRESSURE SEPARATION FROM THE THERMALLY CRACKED MIXTURE TO OBTAIN A HIGHLY AROMATIC RESIDUE SUITABLE FOR CARBON BLACK MANUFACTURE AND HAVING OVERALL CARBON BLACK BASE OIL CHARACTERISTICS SUPERIOR TO THAT OBTAINABLE BY THE THERMAL CRACKLING OF EITHER OF THE COMPONENTS SEPARATELY.
References Cited (Backward Citations)
US2764527A
Cited
US2772219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |