The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 1994
Filed:
Sep. 08, 1992
Applicant:
Inventors:
Kam Ho, Calgary, CA;
Ludo Zanzotto, Calgary, CA;
Assignee:
Husky Oil Operations Ltd., Calgary, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
524 59 ; 524 68 ; 524 69 ; 524 70 ; 524 71 ;
Abstract
An asphalt blend used for paving is described. The blend contains polyethylene which has been modified by shearing action in the presence of an O-containing gas (such as oxygen or ozone). The blend has improved viscosity at high temperatures and reduced stiffness at low temperatures. A paving mix prepared using the asphalt blend has an improved Marshall Test Value (ASTM DI559), indicating that the paving mix should have a reduced tendency to become rutted under the load of traffic.