US2992181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing a petroleum base pitch
Assignee: Sinclair Refining Co
•
Filing: 1957-09-11
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Granted: 1961-07-11
•
Expires: 1977-09-11
Abstract
No abstract record available.
Inventors
- 👤 Jack F Renner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR PRODUCING A PETROLEUM BASE PITCH WHICH COMPRISES HEATING FOR ABOUT 10 TO 5 HOURS AT A TEMPERATURE OF ABOUT 700 TO 1000*F. A PETROLEUM BOTTOMS FEEDSTOCK OBTAINED FROM THE DISTILLATION OF THE CRACKED OIL PRODUCED BY THE CATLYTIC CRACKING OF PETROLUM GAS OILS SAID FEEDSTOCK HAVING THE FOLLOWING APPROXIMATE PROPERTIES:
Claim 2
Dependent Claim
53 words
A PROCESS FOR PRODUCING A PETROLEUM BASE PITCH WHICH COMPRISES HEATING FOR ABOUT 10 TO 5 HOURS AT A TEMPERATURE OF ABOUT 700 TO 1000*F. A PETROLEUM BOTTOMS FEEDSTOCK OBTAINED FROM THE DISTILLATION OF THE CRACKED OIL PRODUCED BY THE CATLYTIC CRACKING OF PETROLUM GAS OILS SAID FEEDSTOCK HAVING THE FOLLOWING APPROXIMATE PROPERTIES:
References Cited (Backward Citations)
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US2626892A
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US2658857A
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US2764527A
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US2763602A
Cited
US2796388A
Cited
US2752290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |