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:
Oct. 17, 2023
Filed:
Apr. 11, 2018
Applicant:
Mitsubishi Pencil Company, Limited, Tokyo, JP;
Inventors:
Ryosuke Matsushima, Fujioka, JP;
Satoru Banzai, Fujioka, JP;
Assignee:
MITSUBISHI PENCIL COMPANY, LIMITED, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B43L 19/00 (2006.01); C08K 3/013 (2018.01); C08K 5/00 (2006.01);
U.S. Cl.
CPC ...
B43L 19/0025 (2013.01); C08K 3/013 (2018.01); C08K 5/0016 (2013.01);
Abstract
Provided is an erasing tool which produces no eraser crumbs and allows a progress for adsorption of even a light color of color pencil leads and the like to be recognized at a glance and which makes it possible to surely erase the color of color pencil lead and has a high light transmittance. The erasing tool is characterized by containing a secondary aggregate having a diameter of 1 to 100 μm with a petaloid particle as a primary particle.