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. 03, 2009
Filed:
Jul. 05, 2004
Hideki Nakaya, Settsu, JP;
Tadahiro Yabu, Settsu, JP;
Mitsuo Tsukamoto, Settsu, JP;
Kenji Otoi, Settsu, JP;
Yoshiyuki Hiraga, Settsu, JP;
Yuji Imahori, Settsu, JP;
Hideki Nakaya, Settsu, JP;
Tadahiro Yabu, Settsu, JP;
Mitsuo Tsukamoto, Settsu, JP;
Kenji Otoi, Settsu, JP;
Yoshiyuki Hiraga, Settsu, JP;
Yuji Imahori, Settsu, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A method of purifying a treatment target substance containing a fluorine-containing surfactant which includes removing at least part of the fluorine-containing surfactant from the treatment target substance by contacting the treatment target substance with a gas containing carbon dioxide. The fluorine-containing surfactant is an ether oxygen-free anionic compound represented by one of general formulae (1) and (2) as defined herein.