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. 14, 2020
Filed:
May. 24, 2019
Kabushiki Kaisha Pilot Corporation, Tokyo-to, JP;
Takashi Ohno, Tokyo-to, JP;
Aya Okoshi, Tokyo-to, JP;
KABUSHIKI KAISHA PILOT CORPORATION, Tokyo-To, JP;
Abstract
The present invention provides an aqueous writing ink composition capable of forming handwriting having both opacity and transparency, also a writing implement using the composition, and further a process for producing the composition. The aqueous writing ink composition according to the present invention comprises a white pigment, resin particles containing styrene-acrylonitrile, a colorant, and a polysaccharide. The content of the white pigment X %, that of the resin particles Y% and that of the polysaccharide Y% satisfy the conditions of0.1≤≤7,  [1]0.5<()/, and  [2]10≤2.5+()≤40.  [3]