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:
Aug. 01, 1995
Filed:
Jul. 22, 1992
Nowaf Halout, Lancaster, PA (US);
Alexandra M Kavoulakis, Lancaster, PA (US);
Ellen R Romano, Elizabethtown, PA (US);
Armstrong World Industries, Inc., Lancaster, PA (US);
Abstract
A wet laying process for making fluid-sealing gasket sheet materials is described. The gasket materials seal particularly well against polar liquids. These gasketing sheets have from about 5 to about 20% fiber, and at least about 62% filler, and a reduced binder concentration, containing about 18% by weight of binder or less, allowing the binder to be reduced even to zero. The sheet must include at least about 3% by total dry weight of a gel-forming mineral filler. In addition to giving from good to very excellent seals against polar liquids, this gasketing also has good torque retention and creep resistance.