US3131140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing an improved asphalt
Assignee: Ashland LLC
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Filing: 1961-04-13
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Granted: 1964-04-28
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Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Herbert James Brice
- 👤 Houlton Harold George
- 👤 Morgan Stuart Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:20
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/02; C10C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR PRODUCING AN ASPHALT WHICH DEMONSTRATES HIGH ADHESION TO A METAL SURFACE, SAID PROCESS COMPRISING, BLOWING A CYLINDER STOCK HAVING A VISCOSITY OF ABOUT 110 TO 190 SUS AT 210*F. TO A SOFTENIG POINT OF ABOUT 230*F. TO 20*F. AND A PENETRATION OF ABOUT 35 TO 50, AND FLUXING THE BLOWN CYLINDER STOCK WITH ABOUT 5 TO 20% BY VOLUME OF A STRAIGHT REDUCED ASPHALT HAVING A PENETRATION OF ABOUT 70 TO 100.
Claim 2
Dependent Claim
75 words
A PROCESS FOR PRODUCING AN ASPHALT WHICH DEMONSTRATES HIGH ADHESION TO A METAL SURFACE, SAID PROCESS COMPRISING, BLOWING A CYLINDER STOCK HAVING A VISCOSITY OF ABOUT 110 TO 190 SUS AT 210*F. TO A SOFTENIG POINT OF ABOUT 230*F. TO 20*F. AND A PENETRATION OF ABOUT 35 TO 50, AND FLUXING THE BLOWN CYLINDER STOCK WITH ABOUT 5 TO 20% BY VOLUME OF A STRAIGHT REDUCED ASPHALT HAVING A PENETRATION OF ABOUT 70 TO 100.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |