US3577250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rubberizing asphalt
Assignee: Phillips Petroleum Co
•
Filing: 1968-03-20
•
Granted: 1971-05-04
•
Expires: 1988-03-20
Abstract
Abstract METHOD OF INCORPORATING AN ELASTOMER INTO ASPHALT BY TREATING THE ASPHALT PAVEMENT WITH AN EMULSION HAVING AN SOLVED ELASTOMER, THE OIL PREFERABLY HAVING AN INITIAL BOILING POINT OF NOT SUBSTANTIALLY LESS THAN 300*C. AT 760 MM. HG AND A VISCOSITY OF ABOVE ABOUT 50 SUS AT 210*F., THE OIL BEING MUTUALLY COMPATIBLE WITH THE ASPHALT AND THE ELASTOMER.
Inventors
- 👤 Fritz S Rostler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/35; E01C7/355; C; C08; C08L; C08L53/00; C08L53/02; C08L95/00; C08L95/005; C10; C10C; C10C3/00; C10C3/02; C10C3/026; E01C7/18; E01C7/26; E01C7/265
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |