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. 24, 1998
Filed:
Nov. 27, 1996
Yukio Kishi, Funabashi, JP;
Nihon Cement Co., Ltd., Tokyo, JP;
Abstract
A titania ceramic body consists of a surface thereof not exceeding 35 pores per square millimeter. The titania ceramic body is made by preparing a titania powder having a purity of at least 99.8 wt % titania and an average particle diameter of 0.5 .mu.m, compacting the powder, sintering a compact at a temperature in the range for 1000.degree. to 1300.degree. C. in air or in a non-air surrounding gas under ordinary pressure to produce a sintered body, hot isostatic pressing treating the sintered body in argon at a temperature of from 800.degree. C. to below temperature carried out in above sintering step under pressure of at least 500 kg/cm2, and then grinding and polishing the hot isostatic pressing treated body.