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:
Jun. 15, 1999
Filed:
Aug. 20, 1997
Applicant:
Inventor:
Mirza A Baig, Des Plaines, IL (US);
Assignee:
USG Interiors, Inc., Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C09D / ; E04B / ;
U.S. Cl.
CPC ...
106698 ; 106D / ; 106122 ; 10620401 ; 1062043 ; 10621701 ; 1062173 ; 162145 ; 162175 ; 1621818 ; 162208 ; 252 62 ; 2523 / ; 181294 ;
Abstract
A composition suitable for making acoustical tiles in a water-felting process comprises expanded perlite, clay, a binder component selected from the group consisting of starch, latex, cellulosic fiber and mixtures thereof and optionally mineral wool. The use of an expanded perlite having a relatively high density, preferably between about 9 pounds per cubic foot to about 20 pounds per cubic foot, enables the formation of a suitable slurry with a relatively low amount of water and enables a more complete dewatering of the mat prior to drying.