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. 26, 2018
Filed:
Feb. 16, 2015
Applicant:
Tosoh Corporation, Shunan-shi, Yamaguchi, JP;
Inventors:
Assignee:
TOSOH CORPORATION, Shunan-shi, Yamaguchi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 11/00 (2006.01); C03B 19/06 (2006.01); C03B 19/08 (2006.01);
U.S. Cl.
CPC ...
C03C 11/00 (2013.01); C03B 19/066 (2013.01); C03B 19/08 (2013.01); C03C 2201/02 (2013.01);
Abstract
To provide opaque quartz glass having no water absorbing properties and being excellent in infrared light shielding properties, and a method for its production. In the production of opaque quartz glass of the present invention, a fine amorphous silica powder and a pore forming agent are mixed, then molded and heated at a predetermined temperature, to obtain opaque quartz glass wherein contained pores are closed pores, the average pore size of pores is from 5 to 20 μm, and the content density of pores is high, whereby the heat shielding properties are high.