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:
Oct. 16, 1990
Filed:
Nov. 15, 1989
Applicant:
Inventors:
John Felegi, Jr, Lancaster, PA (US);
Kenneth P Kehrer, Lancaster, PA (US);
Assignee:
Armstrong World Industries, Inc., Lancaster, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; C08K / ; C08K / ; D21F / ;
U.S. Cl.
CPC ...
524 13 ; 524 35 ; 524443 ; 524445 ; 524494 ; 162145 ; 162146 ; 162147 ; 162152 ;
Abstract
A novel composite board of mineral wool, perlite, and cellulosic newsprint fibers for use primarily as a ceiling tile is disclosed. The board displays virtually no sag (less than 200 mils) when exposed to high temperature and high humidity while displaying quite acceptable strength. The board, or product without mineral wool or perlite, is manufactured by selective deposition of a latex composition on the cellulosic newsprint fibers.