US2944958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making pitch
Assignee: Gulf Research and Development Co
•
Filing: 1958-02-14
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Granted: 1960-07-12
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Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 Richard G Goldthwait
- 👤 William R Lehrian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:56
CPC Classifications
C; C10; C10G; C10G9/00; C10C; C10C1/00; C10C1/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR THE PREPARATION OF A PETROLEUM PITCH HAVING A RING AND BALL SOFTENING POINT ABOVE ABOUT 250* F. AND AN INCIPENT FUSION TEMPERATURE ABOVE ABOUT 130* F. COMPRISING FLASHING A TOPPED CRUDE OIL UNDER VACUUM AT A FLASH TEMPERATURE, CORRECTED TO 760 MM. OF MERCURY ABSOLUTE PRESSURE, ABOVE ABOUT 940*F. TO PRODUCE A HEAVY BOTTOMS FRACTION, VISBREAKING THE HEAVY BOTTOMS FRACTION AT CONDITIONS TO PRODUCT ABOUT 8 TO 17% 400* F. END POINT GASOLINE, DISTILLING THE VISBREAKER PRODUCT IN AN ATMOSPHERIC DISTILLATION TO SEPARATE FURNACE OIL AND
Claim 2
Dependent Claim
89 words
A PROCESS FOR THE PREPARATION OF A PETROLEUM PITCH HAVING A RING AND BALL SOFTENING POINT ABOVE ABOUT 250* F. AND AN INCIPENT FUSION TEMPERATURE ABOVE ABOUT 130* F. COMPRISING FLASHING A TOPPED CRUDE OIL UNDER VACUUM AT A FLASH TEMPERATURE, CORRECTED TO 760 MM. OF MERCURY ABSOLUTE PRESSURE, ABOVE ABOUT 940*F. TO PRODUCE A HEAVY BOTTOMS FRACTION, VISBREAKING THE HEAVY BOTTOMS FRACTION AT CONDITIONS TO PRODUCT ABOUT 8 TO 17% 400* F. END POINT GASOLINE, DISTILLING THE VISBREAKER PRODUCT IN AN ATMOSPHERIC DISTILLATION TO SEPARATE FURNACE OIL AND
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |