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. 09, 2004
Filed:
Apr. 09, 2001
Jacob Leidner, Toronto, CA;
David Hacker, Toronto, CA;
Binney & Smith Inc., Easton, PA (US);
Abstract
Disclosed is an erasable colored pencil lead composition comprising, in an embodiment, a colorant, one or more binder resins, an antioxidant, a fibrillatable or fibrillated material, and a filler. Also disclosed is a colored pencil lead composition which produces marks on paper, which are easily erased by ordinary pencil eraser. The mark made using the composition has a cohesive nature that assists in the removal from paper in sheet or film like sections by the use of an ordinary pencil eraser without smearing or leaving a residue. In a preferred embodiment, the composition is free or substantially free of low melting waxes or waxy materials. The colored pencil lead composition may further include a lubricant. Also disclosed is a method for using a colored pencil lead composition.