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US3072559A
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Preparation of asphalts with lower staining tendencies
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-12-28
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Granted: 1963-01-08
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Expires: 1979-12-28
Abstract
No abstract record available.
Inventors
- 👤 Luke W Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:41
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR PREPARING AN ASPHALT HAVING LOW STAINING PROPERTIES WHICH COMPRISES SEPARATING ASPHALTENES FROM A BASE ASPHALT AND RECOVERING A PETROLENE FRACTION CONTAINING A FIRST FRACTION HAVING A VISCOSITY OF LESS THAN ABOUT 1500 SUS AT 210*F. AND A SPECIFIC GRAVITY AT 60/60*F. OF LESS THAN ABOUT 1.03 AND AN OIL FRACTION COMPRISING POLYCYCLIC AROMATICS AND HAVING A VISCOSITY OF ABOVE ABOUT 10,000 SUS AT 210*F. AND A SPECIFIC GRAVITY AT 60/60*F. BETWEEN ABOUT 1.04 AND ABOUT 1.08, SEPARATING SAID FIRST FRACTION FROM SAID OIL FRACTION AND BLENDING SAID OIL FRACTION WITH A BASE ASPHALT.
Claim 2
Dependent Claim
96 words
A PROCESS FOR PREPARING AN ASPHALT HAVING LOW STAINING PROPERTIES WHICH COMPRISES SEPARATING ASPHALTENES FROM A BASE ASPHALT AND RECOVERING A PETROLENE FRACTION CONTAINING A FIRST FRACTION HAVING A VISCOSITY OF LESS THAN ABOUT 1500 SUS AT 210*F. AND A SPECIFIC GRAVITY AT 60/60*F. OF LESS THAN ABOUT 1.03 AND AN OIL FRACTION COMPRISING POLYCYCLIC AROMATICS AND HAVING A VISCOSITY OF ABOVE ABOUT 10,000 SUS AT 210*F. AND A SPECIFIC GRAVITY AT 60/60*F. BETWEEN ABOUT 1.04 AND ABOUT 1.08, SEPARATING SAID FIRST FRACTION FROM SAID OIL FRACTION AND BLENDING SAID OIL FRACTION WITH A BASE ASPHALT.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |