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. 27, 1981
Filed:
Oct. 17, 1979
Applicant:
Inventors:
Norman Sherman, Ramsey, MN (US);
John H Cameron, St. Paul, MN (US);
Assignee:
Conwed Corporation, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29J / ;
U.S. Cl.
CPC ...
264109 ; 264115 ; 264120 ; 264122 ; 428524 ; 428920 ; 428702 ; 162152 ; 162166 ; 162167 ; 428310 ; 264120 ;
Abstract
A method of producing an improved mineral board and the resulting product are disclosed. According to the present invention, the board is predominantly composed of perlite and a binder therefor, preferably urea-formaldehyde resin. The perlite is crushed after the composition is in its final shape but before the binder is set whereby its strength is substantially increased. The composition and process of making the board substantially reduce energy costs as compared to known methods for making wet-process mineral boards. The product composition may include up to 95% perlite by weight.