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:
Nov. 10, 2020
Filed:
Aug. 09, 2011
Nicolas Leblond, Painted Post, NY (US);
Pushkar Tandon, Painted Post, NY (US);
Srinivas Vemury, Wilmington, NC (US);
Nicolas LeBlond, Painted Post, NY (US);
Pushkar Tandon, Painted Post, NY (US);
Srinivas Vemury, Wilmington, NC (US);
Corning Incorporated, Corning, NY (US);
Abstract
One embodiment of the disclosure relates to a method of cleaning silica-based soot or an article made of silica-based soot, the method comprising the step of treating silica-based soot or the article made of silica-based soot with at least one of the following compounds: (i) a mixture of CO and Clin a carrier gas such that the total concentration of CO and Clin the mixture is greater than 10% (by volume, in carrier gas) and the ratio of CO:Clis between 0.25 and 5; (ii) CClin a carrier gas, such that concentration CClis greater than 1% (by volume, in carrier gas). Preferably, the treatment by CClis performed at temperatures between 600° C., and 850° C. Preferably, the treatment with the CO and Cl mixture is performed at temperatures between 900° C. and 1200° C. The carrier gas may be, for example, He, Ar, N, or the combination thereof.