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. 20, 2006
Filed:
Nov. 24, 2003
Yoshinori Harada, Sagamihara, JP;
Shuzo Mizutani, Fujisawa, JP;
Shinkichi Hashimoto, Sagamihara, JP;
Masakazu Kudoh, Yamagata, JP;
Naoki Miura, Yamagata, JP;
Katsufumi Takahashi, Sakata, JP;
Hideki Kiyohara, Tokuyama, JP;
Yoshinori Harada, Sagamihara, JP;
Shuzo Mizutani, Fujisawa, JP;
Shinkichi Hashimoto, Sagamihara, JP;
Masakazu Kudoh, Yamagata, JP;
Naoki Miura, Yamagata, JP;
Katsufumi Takahashi, Sakata, JP;
Hideki Kiyohara, Tokuyama, JP;
Tosoh Corporation, Yamaguchi, JP;
Tosoh Quartz Corporation, Yamaguchi, JP;
Tosoh SMG Corporation, Yamaguchi, JP;
Abstract
Highly durable silica glass containing 0.01% to 2% by weight of at least one element selected from magnesium, calcium, strontium, barium, yttrium, hafnium and zirconium. The silica glass is produced by melting a powdery material comprising a finely divided silica powder and a finely divided zirconium-containing substance by oxyhydrogen flame or plasma are to form an accumulated molten material layer, and extending the molten material layer outwardly in radial directions.