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:
Sep. 06, 2010
Minoru Hakiri, Shizuoka, JP;
Shin Hasegawa, Shizuoka, JP;
Hiroyuki Fushimi, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Naoya Morohoshi, Shizuoka, JP;
Minoru Hakiri, Shizuoka, JP;
Shin Hasegawa, Shizuoka, JP;
Hiroyuki Fushimi, Shizuoka, JP;
Mitsuru Naruse, Shizuoka, JP;
Naoya Morohoshi, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An inkjet recording ink including a pigment dispersion liquid containing at least a first carbon black and a dispersant, a second carbon black, a penetrant, a wetting agent and water, wherein the first carbon black has an average particle diameter D50 of 70 nm to 180 nm as measured by a dynamic light scattering method and has a particle diameter standard deviation equal to or smaller than ½ of the average particle diameter, wherein the dispersant is a condensate of naphthalene sulfonic acid and formalin, wherein the second carbon black is carbon black coated with a resin, and wherein the penetrant is a 2-ethyl-1,3-hexandiol.