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:
Nov. 30, 2010
Filed:
Nov. 28, 2003
Tatsuhiro Sato, Koriyama, JP;
Takahiro Kaitou, Yokosuka, JP;
Akira Fujinoki, Koriyama, JP;
Toshiyuki Kato, Koriyama, JP;
Tohru Segawa, Koriyama, JP;
Nobumasa Yoshida, Koriyama, JP;
Tatsuhiro Sato, Koriyama, JP;
Takahiro Kaitou, Yokosuka, JP;
Akira Fujinoki, Koriyama, JP;
Toshiyuki Kato, Koriyama, JP;
Tohru Segawa, Koriyama, JP;
Nobumasa Yoshida, Koriyama, JP;
Shin-Etsu Quartz Products Co., Ltd., Tokyo, JP;
Abstract
First of all, there is provided a production process of a synthetic quartz glass which has less impurity, has a high-temperature viscosity characteristic equal to or more than that of a natural quartz glass, and hardly deforms even in a high-temperature environment, and especially a production process of a highly heat resistant synthetic quartz glass which is free from the generation of bubbles and is dense. Secondly, there is provided a highly heat resistant synthetic quartz glass body which is easily obtained by the production process of the present invention, and especially a transparent or black quartz glass body which is free from the generation of bubbles, is dense, has high infrared absorption rate and emission rate, and has an extremely high effect for preventing diffusion of alkali metal. The process is a process of producing a highly heat resistant quartz glass body having an absorption coefficient at 245 nm of 0.05 cmor more, and the silica porous body was subjected to a reduction treatment, followed by baking, thereby forming a dense glass body.