Patent US3656218A successfully refreshed from Google Patents.
Patent US4617215A successfully refreshed from Google Patents.
US2877128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paving asphalt composition and a process of making it
Assignee: Standard Oil Co
•
Filing: 1955-07-05
•
Granted: 1959-03-10
•
Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Harley F Hardman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:55
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/62; C10; C10C; C10C3/00; C10C3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PAVING ASPHALT COMPOSITION HAVING A "FLEXURE LIMIT" BELOW 20* F. CONSISTING ESSENTIALLY OF A PETROLEUM RESIDUUM ASPHALT HAVING A "FLEXURE LIMIT" ABOVE 20* F. AND A PRIMARILY PARAFFINIC LIQUID MINERAL HYDROCARBON OIL CHARACTERIZED BY A POUR POINT BELOW THE "FLEXURE LIMIT" OF THE ASPHALT COMPOSITION, A FLASH POINT (CLEVELAND OPEN CUP) OF AT LEAST 400* F., A VISCOSITY AT 77* F. BELOW 20 POISES, AND A VISCOSITY INDEX ABOVE 40, THE SAID OIL BEING PRESENT IN AN AMOUNT WITHIN THE RANGE FROM ABOUT 10% TO ABOUT 40% TO REDUCE THE "FLEXURE LIMIT" OF THE ASPHALT TO BELOW 20* F.
Claim 2
Dependent Claim
100 words
A PAVING ASPHALT COMPOSITION HAVING A "FLEXURE LIMIT" BELOW 20* F. CONSISTING ESSENTIALLY OF A PETROLEUM RESIDUUM ASPHALT HAVING A "FLEXURE LIMIT" ABOVE 20* F. AND A PRIMARILY PARAFFINIC LIQUID MINERAL HYDROCARBON OIL CHARACTERIZED BY A POUR POINT BELOW THE "FLEXURE LIMIT" OF THE ASPHALT COMPOSITION, A FLASH POINT (CLEVELAND OPEN CUP) OF AT LEAST 400* F., A VISCOSITY AT 77* F. BELOW 20 POISES, AND A VISCOSITY INDEX ABOVE 40, THE SAID OIL BEING PRESENT IN AN AMOUNT WITHIN THE RANGE FROM ABOUT 10% TO ABOUT 40% TO REDUCE THE "FLEXURE LIMIT" OF THE ASPHALT TO BELOW 20* F.
References Cited (Backward Citations)
US227080A
Cited
US1306520A
Cited
US941810A
Cited
US1635567A
Cited
US1883683A
Cited
US1982231A
Cited
US2028922A
Cited
US2392813A
Cited
US2687965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |