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:
Jun. 02, 2015
Filed:
Apr. 08, 2011
Applicants:
Shin Hasegawa, Shizuoka, JP;
Hiroyuki Fushimi, Shizuoka, JP;
Inventors:
Shin Hasegawa, Shizuoka, JP;
Hiroyuki Fushimi, Shizuoka, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 2/01 (2006.01); C09D 11/324 (2014.01); C09D 11/322 (2014.01); B41J 2/175 (2006.01); C09D 11/326 (2014.01);
U.S. Cl.
CPC ...
C09D 11/324 (2013.01); C09D 11/322 (2013.01); B41J 2/17503 (2013.01); C09D 11/326 (2013.01);
Abstract
An inkjet recording ink, which contains: carbon black; a surfactant; water; a water-soluble organic solvent; and particles formed of an anionic self-emulsifying poly(ether urethane) resin, wherein the carbon black contains first carbon black whose surface has been treated with an anionic surfactant and second carbon black which has been coated with a resinous polymer, where a mass ratio of the first carbon black to the second carbon black is 10/90 to 90/10, and wherein the anionic surfactant is a naphthalenesulfonic acid-formaldehyde condensate.