US3563778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of improved asphalt compositions
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1966-02-14
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Granted: 1971-02-16
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Expires: 1986-02-14
Abstract
Abstract AN ASPHALT SEPARATION AND RECOMBINATION PROCESS WHEREIN ASPHALTENES ARE PRECIPITATED FROM AN ASPHALT FEED AND RECOVERED. THE ASPHALTENE-FREE FEED IS THEN EXTRACTED WITH AN ORGANIC SOLVENT TO FORM A PETROLENE EXTRACT AND A PETROLENE RAFFINATE. THE ASPHALTENES AND PETROLENE EXTRACT ARE SUBSEQUENTLY RECOMBINED TO PRODUCE IMPROVED ASPHALT PAVING BINDERS. D R A W I N G
Inventors
- 👤 Luke W Corbett
- 👤 Robert E Swarbrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/08; C10G; C10G21/00; C10G21/003
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |