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:
Dec. 05, 2000
Filed:
Apr. 26, 1993
Applicant:
Inventors:
Gary A Sigel, Lancaster, PA (US);
Roman C Domszy, Lancaster, PA (US);
Assignee:
Armstrong World Industries, Inc., Lancaster, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E04B / ; B01J / ; B05D / ;
U.S. Cl.
CPC ...
252 62 ; 423338 ; 427219 ; 428405 ; 501 12 ; 516101 ;
Abstract
Thermally insulative xerogels and their preparation are described. To obtain these xerogels, an inorganic gel having hydroxyl moieties is reacted with a silicon-nitrogen compound which has a C.sub.1-6 hydrocarbon moiety on the silicon. Shrinkage of the gel during drying the gel is reduced and a more highly porous xerogel is obtained. The more highly porous xerogel has a low thermal conductivity which makes it a good thermal insulation.