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:
Feb. 23, 2010
Filed:
Nov. 30, 2007
Jun Sasai, Chiyoda-ku, JP;
Syuji Matsumoto, Chiyoda-ku, JP;
Takeshi Shimazaki, Chiyoda-ku, JP;
Naoki Sugimoto, Chiyoda-ku, JP;
Jun Sasai, Chiyoda-ku, JP;
Syuji Matsumoto, Chiyoda-ku, JP;
Takeshi Shimazaki, Chiyoda-ku, JP;
Naoki Sugimoto, Chiyoda-ku, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
To provide a production process capable of making the transmittance of an optical glass element obtainable by press-molding a TeO-containing glass high. A process for producing an optical glass element, which comprises press-molding a TeO-containing glass, wherein the press-molding is carried out in an atmosphere in which the nitrogen partial pressure is at most 10Pa. The above process for producing an optical glass element, wherein the face of a mold for the press-molding to be in contact with the glass is made of carbon. The above process for producing an optical glass element, wherein the molded glass obtained by the press-molding is held in an oxygen-containing atmosphere at a temperature within a range of at least a temperature lower by 50° C. than the glass transition point of the TeO-containing glass and at most the softening point of the glass.