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:
Feb. 27, 2007
Filed:
Dec. 23, 2003
Applicants:
Giulio Boara, Crema, IT;
Massimo Sparpaglione, S. Donato Milanese, IT;
Lorenzo Costa, Sommo, IT;
Inventors:
Assignee:
Degussa Novara Technology, S.p.A., Novara, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F26B 3/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
Glassy articles are prepared by subjecting to hydrolysis and policondensation a solution or suspension of a suitable precursor, mainly comprising a silicon alkoxide, and by drying the obtained gel in a pressure chamber, the gel solvent having been substituted by a non-protic solvent, mainly acetone, under nitrogen flowing, at temperature and pressure conditions lower than the gel solvent critical values. The dried gel is then densified by a thermal treatment.