US3372045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphalt compositions and process for preparing same
Assignee: Mobil Oil AS
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Filing: 1963-10-04
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Granted: 1968-03-05
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Expires: 1983-10-04
Abstract
No abstract record available.
Inventors
- 👤 Lester A H Baum
- 👤 Henschel Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:25
CPC Classifications
C; C10; C10C; C10C3/00; C10C3/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS FOR PREPARING A HEAT-STABLE THERMAL ASPHALT WHICH COMPRISES: BLENDING A RESINOUS PITCH MATERIAL DEFICIENT IN HIGHBOILING AROMATIC OILS AND HAVING A SOFTENING POINT (R. & B.) FROM ABOUT 75*F. TO ABOUT 140*F., A SPECIFIC GRAVITY AT 77*F. FROM ABOUT 1.0 TO ABOUT 1.3 AND A CONRADSON CARABON NUMBER FROM ABOUT 25 TO 45%, WITH A LIQUID FURFURAL EXTRACT CONTAINING AT LEAST ABOUT 50% BY WEIGHT OF HIGH-BOILING AROMATIC OILS, AND HAVING A VISCOSITY AT 210*F. SUS FROM ABOUT 40 TO ABOUT 500; AN A.P.I. GRAVITY AT 60*F. FROM ABOUT 5.0 TO ABOUT 20; A FLASH POINT FROM ABOUT 300*F. TO ABOUT 625*F.; AND A POUR POINT OF AT LEAST 20*F.; AND DISTILLING THE RESULTING BLEND TO PRODUCE A HEATSTABLE THERMAL ASPHALT HAVING A SOFTENING POINT (R. & B.) FROM ABOUT 150*F. TO ABOUT 270*F.
Claim 2
Dependent Claim
136 words
A PROCESS FOR PREPARING A HEAT-STABLE THERMAL ASPHALT WHICH COMPRISES: BLENDING A RESINOUS PITCH MATERIAL DEFICIENT IN HIGHBOILING AROMATIC OILS AND HAVING A SOFTENING POINT (R. & B.) FROM ABOUT 75*F. TO ABOUT 140*F., A SPECIFIC GRAVITY AT 77*F. FROM ABOUT 1.0 TO ABOUT 1.3 AND A CONRADSON CARABON NUMBER FROM ABOUT 25 TO 45%, WITH A LIQUID FURFURAL EXTRACT CONTAINING AT LEAST ABOUT 50% BY WEIGHT OF HIGH-BOILING AROMATIC OILS, AND HAVING A VISCOSITY AT 210*F. SUS FROM ABOUT 40 TO ABOUT 500; AN A.P.I. GRAVITY AT 60*F. FROM ABOUT 5.0 TO ABOUT 20; A FLASH POINT FROM ABOUT 300*F. TO ABOUT 625*F.; AND A POUR POINT OF AT LEAST 20*F.; AND DISTILLING THE RESULTING BLEND TO PRODUCE A HEATSTABLE THERMAL ASPHALT HAVING A SOFTENING POINT (R. & B.) FROM ABOUT 150*F. TO ABOUT 270*F.
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) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |