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. 26, 2002
Filed:
Feb. 25, 2000
Robert B. Bruce, Burlington, CA;
David M. Harriss, Chesterfield, VA (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
The present invention relates to a process for manufacturing a gypsum-based substrate. The process includes the steps mixing gypsum and water to produce a gypsum slurry, providing a synthetic polymeric fibrous sheet on one side of a layer of the gypsum slurry, and adhering to the wet gypsum to the sheet with an adhesive strength of at least 7.5 lb. The present invention is also directed to a gypsum board comprised of first and second polymeric fibrous sheets adhered to opposite sides of a wet gypsum core, wherein the first surface of the first sheet and the first surface of the second sheet have pores containing set gypsum and the first and second sheets adhere to said wet gypsum core with an adhesive strength of at least 7.5 lb.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile