US3793189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reconstituted asphalt paving compositions
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1971-12-03
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Granted: 1974-02-19
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Expires: 1991-12-03
Abstract
Abstract Asphaltic compositions suitable for use in paving formulations and having desirable viscosity, temperature susceptibility and ductility properties can be made by combining propane precipitated asphalt, asphaltenes and a liquid petroleum derivative such as a heavy distillate or residual oil. These compositions allow maximum utilization of low cost asphaltenes and produce compositions having improved viscosity and temperature susceptibility properties.
Inventors
- 👤 L Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:29
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
A composition according to claim 1 which is made by the process of: a. blending said propane precipitated asphalt with a petroleum distillate to form a first liquid blend; b. blending said asphaltenes with a petroleum distillate to form a second liquid blend; c. blending said first and second blends with a residual petroleum oil to form a mixture; and d. distilling said mixture so as to substantially recover said petroleum distillate and so as to leave said asphaltic composition as a residue.
Claim 2
Dependent Claim
20 words
The composition of claim 1 wherein said liquid petroleum fraction constitutes about 20 to 55 weight percent of said composition.
Claim 3
Dependent Claim
20 words
The composition of claim 1 wherein said asphaltenes of component (a) constitute about 10 to 25 percent of said composition.
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein said propane precipitated asphalt constitutes about 10 to 30 weight percent of said composition.
Claim 5
Dependent Claim
18 words
The composition of claim 1 wherein said asphaltenes have been obtained from a residuum by normal haptane precipitation.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |