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:
Dec. 17, 1991
Filed:
May. 07, 1990
Donald R Witt, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
Sodium-free olefin polymerization catalysts having high polymerization activities and methods of preparing such catalysts are provided. A hydrolyzable silicate ester and a hydrolyzable acid-generating chromium compound are combined with water and an organic solvent whereby a hydrolysis reaction solution is formed comprising silica and chromium. Sufficient acid-neutralizing gelling agent is added to the solution to form a gelled silica-chromium catalyst and the catalyst is aged to stabilize its structure. Water and solvent are removed from the catalyst and the catalyst is activated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile