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:
Feb. 26, 1980
Filed:
Dec. 21, 1977
Applicant:
Inventors:
Lewis W Eckert, Lancaster, PA (US);
Olivia D Stewart, Lancaster, PA (US);
Assignee:
Armstrong Cork Company, Lancaster, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
162145 ; 162152 ; 162178 ; 162183 ; 162D / ;
Abstract
An improved method for producing acoustical fiberboard, which method comprises adding agglomerate articles formed from an aqueous composition comprising fiberboard dust, a glactomannan gum or glactomannan gum derivative, and a crosslinking agent to an aqueous fiberboard slurry, is disclosed. The resulting acoustical fiberboard exhibits excellent sound absorption.