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:
Jun. 23, 1992
Filed:
Jan. 25, 1990
Raymond H Fernando, Lancaster, PA (US);
Walter J Bohrn, Lancaster, PA (US);
Armstrong World Industries, Inc., Lancaster, PA (US);
Abstract
The flexibility of aminoplast wear layers is improved by the addition of a phyllosilicate. The concentration of the phyllosilicate is sufficiently low to not adversely affect other physical properties of the wear layer. The reduction or elimination of urethane improves stain resistance. The gloss level obtained for a given concentration of phyllosilicate depends on the particle size, and therefore type of phyllosilicate, as well as amount of phyllosilicate. A surface covering having areas of different gloss level can be obtained by printing areas forming the wear layer with compositions containing different types of phyllosilicates.