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. 20, 1979
Filed:
Feb. 27, 1978
Applicant:
Inventors:
Allan J Luck, Harvard, IL (US);
John T Clarke, St. Charles, IL (US);
Michael R Hoffman, Elgin, IL (US);
Assignee:
Masonite Corporation, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B29J / ;
U.S. Cl.
CPC ...
428171 ; 428218 ; 428236 ; 428301 ; 428451 ; 428452 ; 428526 ; 428531 ; 156 622 ; 156 628 ; 156331 ; 156285 ;
Abstract
A mineral wool board is manufactured having relatively high density skins by including urea in at least the surface fibers of a consolidated mineral wool fiberboard containing cellulosic fibers and/or starch and then hot-pressing the consolidated board at a temperature of at least 525.degree. F. to form a board having high density surface skins.