US3707388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphaltic compositions
Assignee: Mobil Oil AS
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Filing: 1971-01-18
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Granted: 1972-12-26
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Expires: 1991-01-18
Abstract
Abstract ASPHALTIC COMPOSITIONS ARE PROVIDED WHICH ARE OBTAINED BY POLYMERIZING A CHARGE-STOCK COMPRISING A PETROLEUM ASPHALT, DERIVED FROM THE THERMAL PROCESSING OF PETROLEUM HYDROCARBONS, HAVING A SPECIFIC GRAVITY OF AT LEAST ABOUT 1.1 AND A BENZENE-INSOLUBLES CONTENT FROM ABOUT 0 TO ABOUT 12 PERCENT BY WEIGHT, IN THE PRESENCE OF OXYGEN AT A RATE FROM ABOUT 0.4 C.F.M./BBL. TO ABOUT 2.7 C.F.M./BBL. AND AT A TEMPERATURE IN THE RANGE FROM ABOUT 700*F. TO ABOUT 850*F. A FINISHED PETROLEUM ASPHALT IS PRODUCED HAVING INCREASED SPECIFIC GRAVITY AND A BENZENE-INSOLUBLES CONTENT FROM ABOUT 15 TO ABOUT 35 PERCENT BY WEIGHT, AND CAN BE EMPLOYED AS A BINDER FOR CARBON PARTICLES IN ELECTRODES.
Inventors
- 👤 Robert N Kinnaird Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:45
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |