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:
Apr. 13, 1976
Filed:
May. 29, 1973
Applicant:
Inventors:
John M Pallo, Englewood, CO (US);
Donald J Fischer, Sedalia, CO (US);
Assignee:
Johns-Manville Corporation, Denver, CO (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
252 62 ; 252385 ;
Abstract
A thermal insulation composition is described which is dry, free-flowing, granular, and has a thermal conductivity approximately that of dry still air. The composition contains two granular siliceous materials and a granular opacifier. The first siliceous material is coarser and denser, and provides the principal bulk density of the final mixture. The second siliceous material is quite fine, and provides the principal free-flowing properties of the mixture. In a preferred embodiment a third siliceous material is also included to increase the overall surface area.