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. 07, 1987
Filed:
Jan. 07, 1985
Applicant:
Inventor:
Christopher P Michalek, Lake Zurich, IL (US);
Assignee:
United States Gypsum Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C08J / ; E04B / ;
U.S. Cl.
CPC ...
252 62 ; 264 453 ; 264 50 ;
Abstract
A lightweight cast acoustical material requiring less drying time and energy is obtained by lightly cooking an aqueous slurry of starch, cooling it to about less than 140.degree. F., whipping air into it, adding granulated mineral wool with thorough mixing to form a foam, casting the resultant wet foamed pulp into a form and drying the formed pulp to an acoustical product. The web pulp has an about 40 weight % reduction in water content, resulting in considerable savings in drying time and energy.