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. 07, 2004
Filed:
Oct. 18, 2001
Kazutaka Hayashi, Tokyo, JP;
Hiromasa Tawarayama, Tokyo, JP;
Xuelu Zou, Tokyo, JP;
Hiroshi Kawazoe, Kanagawa, JP;
Hoya Corporation, Tokyo, JP;
Abstract
Provided are a process for the production of a precision press-molded article having a high transmittance and a method of treating a glass to color or decolor the glass, the process comprising heat-treating a press-molded article containing at least one selected from WO , Nb O or TiO in an oxidizing atmosphere to produce a glass molded article, and the method comprising heat-treating a colored glass containing at least one oxide of WO and Nb O in an oxidizing atmosphere to decolor the glass, or heat-treating a glass containing at least one oxide selected from WO , Nb O or TiO in a non-oxidizing atmosphere to color the glass.