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:
Mar. 20, 2001
Filed:
Nov. 18, 1998
Applicant:
Inventors:
Eigo Tanuma, Yokohama, JP;
Takashi Tokugawa, Tokyo, JP;
Assignee:
Bridgestone Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C22B 9/02 ;
U.S. Cl.
CPC ...
C22B 9/02 ;
Abstract
A ceramic filter arranged in a flow passage through which a molten metal is poured from a gate into a cavity of a casting mold. The ceramic filter has a ceramic main body of a three-dimensional reticulated skeleton structure having interconnected pores. The main body is formed into a cylindrical shape having an inner hollow portion. A method of making the ceramic main body is disclosed by applying a ceramic slurry on a reticulated synthetic resin foam having no cell membranes. The foam is sintered and applied with the ceramic slurry until the foam is removed by carbonization.