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. 31, 1999
Filed:
Feb. 16, 1998
Chau H Duong, Lititz, PA (US);
Harry D Ward, Lancaster, PA (US);
Lowell E West, Elizabethtown, PA (US);
Armstrong World Industries, Inc., Lancaster, PA (US);
Abstract
A highly filled surface covering, preferably a floor covering and more preferably a floor tile, includes a resin layer which has about 80% to about 95% by weight of filler and a chlorine-free binder. The binder includes a mixture of a maleic anhydride grafted polyethylene and a substantially linear ethylene/octene copolymer. The ratio of maleic anhydride grafted polyethylene and ethylene/octene copolymer is from about 1:5 to about 1:15 by weight. The preferred formulation for the binder includes a solid tackifier selected from the group consisting of a hydrocarbon resin having an ester moiety and hydrogenated aromatic resin.