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:
Jun. 26, 1984
Filed:
Nov. 12, 1981
Donald D Carlos, Louisville, KY (US);
Charles R Gannon, Ashland, KY (US);
Robert H Wombles, Worthington, KY (US);
Ashland Oil, Inc., Ashland, KY (US);
Abstract
Disclosed is a process for producing high grade asphaltic materials from low grade bituminous materials and the improved products resulting therefrom. More particularly, there is disclosed a process utilizing a particular type of oxidation catalyst in preparing novel high quality paving grade asphalt cements and novel roofing grade asphalts from poor and marginal quality bituminous materials. Also, the process can be used to prepare novel superior quality asphaltic materials from good quality bituminous flux feedstocks. This process consists of catalytically oxidizing asphalt fluxes, for example, in a single or multi-stage oxidation, using the particular type of catalyst disclosed hereinafter in each stage to chemically modify the flux so that the resultant asphaltic material meets physical requirements necessary for a finished product possessing good temperature susceptibility characteristics.