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:
Sep. 18, 1984
Filed:
Feb. 22, 1983
Applicant:
Inventors:
Assignee:
The Toyo Rubber Industry Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29H / ;
U.S. Cl.
CPC ...
264 44 ; 264 86 ; 501-1 ;
Abstract
A process for the production of a porous ceramic mold is described, compsiging adding about 40 to 60 parts by weight of water to 100 parts by weight of a ceramic material, mixing the thus-formed ceramic slurry with about 20 to 40 parts by weight of a hydrophilic urethane prepolymer having a free isocyanate group content of from about 4% to 7% by weight, reacting and foaming the resulting mixture after the introduction thereof into a mold, drying the thus-formed foamed urethane molded article, and combusting very slowly and sintering the dried foamed urethane molded article to produce a porous ceramic molded article.