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:
Aug. 10, 2004
Filed:
Aug. 26, 2002
Alain Kerdoncuff, Vincennes, FR;
Alexandre M. Mayolet, Auneau, FR;
Corning Incorporated, Corning, NY (US);
Abstract
The optical fluoride crystal treatment device of the invention includes a enclosure ( ) separating the device from its external environment, heating means to heat and keep the internal volume ( ) of said enclosure ( ) at a predetermined temperature, at least one hollow platform ( ) delimiting an internal chamber ( ) whose upper wall ( ) bears at least two independent diffusers ( ) each delimiting a cavity ( ) able to receive a unitary quantity ( ) of said optical fluoride crystal substance, each of said cavities ( ) communicating with said internal chamber ( ) of the corresponding platform ( ), a gas supply source containing said reactive gas, and means ( ) for distributing said gas containing said reactive gas from said supply source to the inside of the internal chamber of each platform and having means ( ) for regulating the pressure of said distributed gas. This optical fluoride crystal treatment device is preferably used to carry out anionic purification with a reactive gas formed of a fluoridation gas, a fluoride powder of an alkaline metal or alkaline-earth metal in the making of optical fluoride crystals.