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. 08, 2014
Filed:
Jan. 22, 2010
Aya Otsubo, Tokyo, JP;
Ikuo Takagishi, Tokyo, JP;
Kiyonori Yasuike, Tokyo, JP;
Hiroki Kimura, Tokyo, JP;
Takashi Sekine, Tokyo, JP;
Aya Otsubo, Tokyo, JP;
Ikuo Takagishi, Tokyo, JP;
Kiyonori Yasuike, Tokyo, JP;
Hiroki Kimura, Tokyo, JP;
Takashi Sekine, Tokyo, JP;
Pentel Kabushiki Kaisha, , JP;
Abstract
An ink composition for ballpoint pens comprises a coloring agent, a liquid medium, a polyoxyethylene castor oil and/or a polyoxyethylene hardened castor oil, or a derivative thereof, and one compound or a mixture of two or more compounds selected from the group consisting of a monoalkyl ether phosphoric acid, a polyoxyethylene monoalkyl ether phosphoric acid, a dialkyl ether phosphoric acid, a polyoxyethylene dialkyl ether phosphoric acid, a trialkyl ether phosphoric acid, and a polyoxyethylene trialkyl ether phosphoric acid.