US2991241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of pitch comprising heating and concurrently airblowing the bottoms of a distilled catalytically cracked gas oil
Assignee: Sinclair Refining Co
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Filing: 1957-09-11
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Granted: 1961-07-04
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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 23:53
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR PRODUCING A PETROLEUM BASE PITCH WHICH COMPRISES HEATING AT A TEMPERATURE OF ABOUT 300 TO 650*F. A PETROLEUM BOTTOMS FEEDSTOCK OBTAINED FROM THE DISTILLATION OF THE CRACKED OIL PRODUCED BY THE CATALYTIC CRACKING OF PETROLEUM GAS OILS, SAID FEEDSTOCK HAVING THE FOLLOWING APPROXIMATE PROPERTIES:
Claim 2
Dependent Claim
47 words
A PROCESS FOR PRODUCING A PETROLEUM BASE PITCH WHICH COMPRISES HEATING AT A TEMPERATURE OF ABOUT 300 TO 650*F. A PETROLEUM BOTTOMS FEEDSTOCK OBTAINED FROM THE DISTILLATION OF THE CRACKED OIL PRODUCED BY THE CATALYTIC CRACKING OF PETROLEUM GAS OILS, SAID FEEDSTOCK HAVING THE FOLLOWING APPROXIMATE PROPERTIES:
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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |