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. 18, 1998
Filed:
Jul. 03, 1996
Gerard Pajonk, Lyons, FR;
Elimame Elaloui, Vaulx en Velin, FR;
Redouane Begag, Bron, FR;
Marcel Durant, Mennecy, FR;
Bruno Chevalier, Grenoble, FR;
Jean-Luc Chevalier, St Etienne de Crossey, FR;
Patrick Achard, Le Plan de Grasse, FR;
Universite Claude Bernard, Villeurbanne, FR;
Produits Chimiques Auxiliares, Longiumeau, FR;
Armienes, Paris, FR;
Centre Scientifique et Technque Du Batiment, Paris, FR;
Abstract
A process for the preparation of a silica aerogel that includes subjecting a mixture that includes an organosilicon compound and ethyl acetoacetate to hydrolysis and polycondensation in an acidic medium to obtain a transparent gel. The organic solvent is substituted by liquid carbon dioxide and the carbon dioxide is evacuated under supercritical conditions of the carbon dioxide to obtain an aerogel.