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:
Mar. 20, 2007
Filed:
Apr. 02, 2003
Hachiro Nakanishi, Miyagi, JP;
Koich Baba, Miyagi, JP;
Hitoshi Kasai, Miyagi, JP;
Hidetoshi Oikawa, Miyagi, JP;
Shuji Oikawa, Miyagi, JP;
Hachiro Nakanishi, Miyagi, JP;
Koich Baba, Miyagi, JP;
Hitoshi Kasai, Miyagi, JP;
Hidetoshi Oikawa, Miyagi, JP;
Shuji Oikawa, Miyagi, JP;
Japan Science and Technology Agency, Kawaguchi, JP;
Abstract
The process for producing highly concentrated nanometer-size fine particles of an organic pigment, which comprises dissolving the organic pigment in an amide solvent, especially an organic solvent comprising at least 50 vol % 1-methyl-2-pyrrodinone, and pouring the resultant organic pigment solution with stirring into a poor solvent which is not compatible with the organic pigment. The pigment may be a quinacridone pigment, phthalocyanine pigment etc. Any atmospheric pressure to a sub-critical and/or supercritical state can be employed as the production conditions.