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. 20, 2000
Filed:
Dec. 22, 1997
Applicant:
Inventors:
Tomonori Takahashi, Chita, JP;
Manabu Isomura, Tsushima, JP;
Assignee:
NGK Insulators, Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501 80 ; 2105101 ; 21050021 ; 21050025 ;
Abstract
A ceramic porous membrane in which aggregate particles are bound by binding portions composed of a titania, is provided. The binding portions composed of a titania are contained in an amount of 1-30% by weight based on the aggregate particles, and the aggregate particles comprise an .alpha.-alumina. The porous membrane is formed on a porous substrate to form a ceramic filter. A slurry comprising aggregate particles and 1-70% by weight of binding portions composed of a titania based on the aggregate particles are prepared, and thermally treating the slurry at a temperature of 300-700.degree. C. under ambient atmosphere to form the porous membrane.