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:
Sep. 17, 2019
Filed:
Sep. 28, 2016
Kazuhiko Umemura, Shizuoka, JP;
Hiroyuki Fushimi, Shizuoka, JP;
Yoshihiro Moriya, Shizuoka, JP;
Tamotsu Aruga, Shizuoka, JP;
Kazuhiko Umemura, Shizuoka, JP;
Hiroyuki Fushimi, Shizuoka, JP;
Yoshihiro Moriya, Shizuoka, JP;
Tamotsu Aruga, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
Ink includes water, a pigment, an organic solvent including glycol ether, and a surfactant including a silicone-based surfactant and a salt of sulfo succinic acid dialkyl ester. As measured by maximum bubble pressure technique at 23 degrees C., the dynamic surface tension of the ink at 15 msec is not greater than 31 mN/m and the difference between the dynamic surface tension of the ink at 15 msec and the dynamic surface tension of the ink at 1,500 msec is not greater than 4.0 mN/m.