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. 22, 1985
Filed:
Jun. 18, 1984
Applicant:
Inventors:
Norman E Johnstone, Schaumburg, IL (US);
John R Kehoe, Schaumburg, IL (US);
Assignee:
United States Gypsum Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
162135 ; 162124 ; 162128 ; 162158 ; 1621624 ; 1621683 ; 1621812 ; 1621813 ; 428537 ; 428703 ;
Abstract
A composite paper particularly adapted for use as cover sheets in the production of gypsum wallboard, the paper being sufficiently porous to permit better drainage and more rapid drying in the production of the paper, and when applied to the surfaces of a gypsum slurry for forming wallboard, permits less heat to be utilized in the wallboard conversion, thereby saving energy in the board production required for drying the board. The paper comprises in weight percent:
Johnstone, Norman. (1985). Paper having calcium sulfate mineral filler for use in the production of (U.S. Patent No. 4548676). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4548676
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile