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:
Mar. 16, 2004
Filed:
Oct. 10, 2001
Keith J. Allison, Blandon, PA (US);
Richard J. Kaiser, Allentown, PA (US);
Binney & Smith, Easton, PA (US);
Abstract
A water-based, erasable marking composition comprising 1-86% by weight water, 0.3-38% by weight pigment, 13-45% by weight polyurethane, and 0-85% by weight glycerin, wherein said polyurethane has a viscosity which increases by at least a factor of 10 when said polyurethane is dried from a 30% dispersion of said polyurethane in water to a 65% polyurethane dispersion in water. The present invention also includes an application instrument comprising an outer body having a first end, an applicator at the first end of the outer body, a reservoir included within the outer body and in fluid communication with the applicator, and a water-based, erasable marking composition within the reservoir. The water-based, erasable marking composition comprises the composition of the invention.