US3778397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing rubberized bituminous paving compositions
Assignee: Ashland LLC
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Filing: 1971-03-24
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Granted: 1973-12-11
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Expires: 1991-03-24
Abstract
Abstract AQUEOUS EMULSIONS OF POLYMER RUBBER AND AQUEOUS EMULSIONS OF ASPHALT ARE MIXED AT TEMPERATURES SLIGHTLY ABOVE AMBIENT (90-100*F.) AND THEN COMBINED WITH HEATED AGGREGATE IN A PUG MILL TO FORMULATE A PAVING COMPOSITION. USE OF THIS PROCESS MINIMIZES DEPOLYMERIZATION OF THE POLYMER IN THE FINAL PAVING COMPOSITION DURING MIXING.
Inventors
- 👤 C Gannon
- 👤 G Beddoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:32
CPC Classifications
C; C08; C08L; C08L95/00; C08L95/005
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |