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:
Nov. 23, 1976
Filed:
Mar. 16, 1973
Applicant:
Inventors:
Alfons Knauf, Siersburg, DT;
Karl Knauf, Iphofen, DT;
Franz Wirsching, Iphofen, Mfr., DT;
Gerhard Neuhauser, Mainbernheim, DT;
Herbert Altenhofer, Iphofen, DT;
Assignee:
Gebr. Knauf Westdeutsche Gipswerke, Iphofen, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428213 ; 428228 ; 428251 ; 428268 ; 428285 ; 428299 ; 428317 ; 156 42 ; 156 71 ;
Abstract
A multi-layered gypsum board for construction purposes in which a mixture of gypsum, water and fibers provide the center or core of the board, and a composite coating of a fiberglass layer and a layer of fiberglass fleece covers one of the major surfaces of the core, with the fiberglass layer being embedded into the mixture and plaster favorably adhering to the outer surface of the fiberglass fleece layer. The other major surface of the core may be covered with a similar coating, or a layer, for example, of pasteboard.