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. 31, 1991
Filed:
Oct. 11, 1989
Applicant:
Inventors:
Fujio Mizukami, Ibaraki, JP;
Kazuyuki Maeda, Ibaraki, JP;
Shuichi Niwa, Ibaraki, JP;
Makoto Toba, Ibaraki, JP;
Junichi Mine, Kanagawa, JP;
Assignees:
Agency of Industrial Science and Technology, Tokyo, JP;
Nissan Motor Company, Ltd., Yokohama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01F / ;
U.S. Cl.
CPC ...
423628 ; 423625 ; 423629 ; 423630 ;
Abstract
A process of production of alumina includes method for controlling specific surface area of alumina. Control of specific surface area is performed by controlling porous structure of alumina. In the process, aluminum alkoxide is subject hydrolysis for forming alumina sol. During hydrolysis process, polyether is used as organic solvent in order to control the porous structure of produced alumina.