Patent US3270631A successfully refreshed from Google Patents.
US3270631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying seal coat paving mixtures
Assignee: Chevron USA Inc
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Filing: 1963-04-18
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Granted: 1966-09-06
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Expires: 1983-04-18
Abstract
No abstract record available.
Inventors
- 👤 Harry C Bower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:47
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/35; E01C7/353
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
THE METHOD OF REPAIRING WORN AND ERODED ROAD SURFACES WHICH COMPRISES (A) HEATING A DENSELY-GRADED SILICEOUS AGGREGATE TO A TEMPERATURE FROM ABOUT 325 TO ABOUT 375*F.; (B) INTIMATELY MIXING THE HEATED AGGREGATE WITH A CATIONIC EMULSION OF FROM ABOUT 70 TO ABOUT 75% BY WEIGHT OF AN ASPHALT, CHARACTERIZED BY A VISCOSITY IN THE RANGE FROM ABOUT 600 TO ABOUT 6000 POISES AT 140*F. AND EMULSIFIED IN WATER WITH THE AID OF A CATION-ACTIVE EMULSIFIER THERMALLY STABLE UP TO ABOUT 350*F., SAND EMULSION, HAVING DISPERSED THEREIN FROM ABOUT 1.0 TO ABOUT 10.0% BY WEIGHT THEREOF, OF A LIGHT PETROLEUM HYDROCARBON DISTILLATE BOILING BETWEEN ABOUT 300 AND ABOUT 600*F. (ASTM D-86); (C) SPREADING THE RESULTING MIXTURE AT A TEMPERATURE OF ABOUT 200*F. OVER THE SURFACE TO BE REPAIRED; AND (D) COMPACTING THE SPREAD MIXTURE AT TEMPERATURES BETWEEN ABOUT 190 AND 130*F.
Claim 2
Independent Claim
140 words
THE METHOD OF REPAIRING WORN AND ERODED ROAD SURFACES WHICH COMPRISES (A) HEATING A DENSELY-GRADED SILICEOUS AGGREGATE TO A TEMPERATURE FROM ABOUT 325 TO ABOUT 375*F.; (B) INTIMATELY MIXING THE HEATED AGGREGATE WITH A CATIONIC EMULSION OF FROM ABOUT 70 TO ABOUT 75% BY WEIGHT OF AN ASPHALT, CHARACTERIZED BY A VISCOSITY IN THE RANGE FROM ABOUT 600 TO ABOUT 6000 POISES AT 140*F. AND EMULSIFIED IN WATER WITH THE AID OF A CATION-ACTIVE EMULSIFIER THERMALLY STABLE UP TO ABOUT 350*F., SAND EMULSION, HAVING DISPERSED THEREIN FROM ABOUT 1.0 TO ABOUT 10.0% BY WEIGHT THEREOF, OF A LIGHT PETROLEUM HYDROCARBON DISTILLATE BOILING BETWEEN ABOUT 300 AND ABOUT 600*F. (ASTM D-86); (C) SPREADING THE RESULTING MIXTURE AT A TEMPERATURE OF ABOUT 200*F. OVER THE SURFACE TO BE REPAIRED; AND (D) COMPACTING THE SPREAD MIXTURE AT TEMPERATURES BETWEEN ABOUT 190 AND 130*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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |