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:
Oct. 11, 1977
Filed:
Jan. 28, 1974
Applicant:
Inventors:
Jerome H Krekeler, Cincinnati, OH (US);
William Kirch, Clinton, IA (US);
Henri A Aboutboul, Brussels, BE;
Assignee:
National Petro Chemicals Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423338 ; 423335 ; 423339 ; 252451 ;
Abstract
Silica xerogels having pore volumes greater than about 2.0 cc/g., the major portion of which volumes are provided by pores having pore diameters ranging from 300 to 600 A, and surface areas ranging from 200 to 500 m.sup.2 /g. Xerogels having such cumulative pore volume, pore diameter distribution, and surface area characteristics are useful as supports for stereospecific catalysts for particle form olefin polymerization reactions effecting the production of low molecular weight, high melt index polyolefins.