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:
Jul. 28, 2015
Filed:
Aug. 05, 2011
Katsunori Kitazawa, Fujioka, JP;
Suguru Yazawa, Fujioka, JP;
Masaaki Matsumoto, Fujioka, JP;
MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo, JP;
Abstract
A solid drawing material with which it is possible to smoothly and darkly draw on a smooth non-absorbing surface, as well as on conventional high-quality paper, drawing paper, or copy paper, and with which it is also possible to draw darkly and clearly on a transparent flat surface, and to easily erase a drawing on these non-absorbing surfaces using a fabric, paper, or whiteboard eraser. A solid drawing material containing at least a resin component, a wax component, a pigment, titanium dioxide, and a filler, wherein the resin component includes rosin and/or modified rosin in an amount that is within the range of 0.5 to 20 wt %, and the wax component includes a glycerin fatty acid ester and/or pentaerythritol fatty acid ester, both fatty acid esters having a melting point of 45° C. or higher, in an amount that is within the range of 8 to 50 wt %.