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:
Mar. 13, 1990
Filed:
Jul. 27, 1988
Applicant:
Inventor:
Mark A Plummer, Littleton, CO (US);
Assignee:
Marathon Oil Company, Findlay, OH (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
1062811 ; 1062843 ; 1062731 ; 208 22 ; 208 39 ; 208 44 ;
Abstract
Asphalt used for road paving containing catalytic cracking catalyst particles which have been burned to remove hydrocarbons deposited thereon during a petroleum catalytic cracking process. The catalyst particles may be present in the asphalt in amounts of from 0.1% to 5.0% by weight of the asphalt, but more preferably from 0.2% to 2.0% by weight of the asphalt. The particles, which are comprised of crystalline and amorphous silica and alumina and silica-alumina combinations, function to prevent oxidative condensation of the asphalt, thus preventing hardening of the asphalt.