US3779964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt rubberizing compositions
Assignee: Phillips Petroleum Co
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Filing: 1971-10-08
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Granted: 1973-12-18
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Expires: 1991-10-08
Abstract
Abstract THE LOW TEMPERATURE DUCTILITY OF ASPHALTS IS IMPROVED BY INCORPORATION OF A SMALL AMOUNT OF A BLEND COMPRISING RUBBER, A HEAVY RESIDUAL PETROLEUM OIL HIGH IN AROMATICS, AND CARBON BLACK. ASPHALTS CONTAINING A LIQUID OIL-RUBBERCARBON BLACK BLEND CAN BE USED IN PAVING COMPOSITIONS AND THE LIKE.
Inventors
- 👤 D Gagle
- 👤 H Draper
- 👤 R Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:53
CPC Classifications
C; C08; C08L; C08L95/00
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |