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:
Jan. 31, 1989
Filed:
Apr. 17, 1987
Applicant:
Inventors:
Junji Nishii, Osaka, JP;
Takashi Yamagishi, Osaka, JP;
Assignee:
Nippon Sheet Glass Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423510 ; 423111 ; 423155 ; 423508 ; 423625 ; 423635 ;
Abstract
A method for purifying starting materials for chalcogenide glass is disclosed, which comprises contacting chalcogen starting materials at a high temperature with a metal which is more susceptible to oxidation than the chalcogen starting materials to allow the metal to react with oxygen contained as impurity in the chalcogen starting material to form an oxide of the metal, and then removing the metal and the oxide of the metal from the chalcogen starting materials.