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:
Jan. 25, 2005
Filed:
Apr. 25, 2003
Applicant:
Hubert C. Francis, Lithonia, GA (US);
Inventor:
Hubert C. Francis, Lithonia, GA (US);
Assignee:
Georgia-Pacific Gypsum, Inc., Atlanta, GA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 1418 ; C04B 2804 ; C04B 2806 ;
U.S. Cl.
CPC ...
Abstract
The present invention describes an improved building material composition, useful for example as a fire door core and to improved methods of making this composition. The building material of the present invention is prepared from an aqueous mixture of expanded perlite and a fast setting, cementitious composition consisting essentially of a hydraulic cement having (1) a Portland cement and (2) a calcium aluminate cement, which composition can be molded and shaped into a fire door core.