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:
Oct. 13, 2015
Filed:
Nov. 24, 2011
Philippe Belleville, Tours, FR;
Philippe Prene, Artannes sur Indre, FR;
Xavier Le Guevel, Herbignac, FR;
Philippe Belleville, Tours, FR;
Philippe Prene, Artannes sur Indre, FR;
Xavier Le Guevel, Herbignac, FR;
Abstract
The invention relates to a method for preparing sols of metal oxides, with an aqueous component, which are stable over time and which notably allow the making of thin films having both remarkable optical and abrasion resistance properties. This method comprises: (i) replacing with water all or part of the alcohol or of the alcohols present in an alcoholic sol of a metal oxide, with a neutral or basic pH, and optionally (ii) adjusting the pH of the thereby obtained aqueous or partly aqueous sol to a value of at least 8. The invention also relates to a method for making films from these sols and, in particular, thin films with optical properties and resistant to abrasion. Applications: making optical components for power lasers, making optical fibers, cathodic tubes, etc.