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:
May. 04, 1976
Filed:
Feb. 25, 1974
Applicant:
Inventor:
Walter W Chamberlain, III, Lancaster, PA (US);
Assignee:
Armstrong Cork Company, Lancaster, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; E04B / ;
U.S. Cl.
CPC ...
156253 ; 181 / ; 428137 ;
Abstract
A standard fiber composition ceiling board is provided with an outer laminate of plasticized vinyl film. The holes in the film are smaller than the holes in the fiber composition ceiling board. The product is made by laminating the vinyl film to the ceiling board, then perforating the film and the ceiling board with pin punches. The perforations in the board stay at the size at which they are formed, while the holes in the film shrink in size.