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. 12, 2001
Filed:
Nov. 22, 1999
Applicant:
Inventors:
Fumihiko Yamaguchi, Settsu, JP;
Toshiyuki Katsube, Settsu, JP;
Assignee:
Daikin Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 2/976 ; C07C 2/980 ; C07C 2/986 ;
U.S. Cl.
CPC ...
C07C 2/976 ; C07C 2/980 ; C07C 2/986 ;
Abstract
In a method for recovering a fluorine-containing solvent from the mixture comprising the fluorine-containing solvent and dyes, (i) a method for recovering a fluorine-containing solvent by distillation; and (ii) a method for recovering a fluorine-containing solvent comprising the steps of adding to the mixture the second solvent which uniformly mixes with the fluorine-containing solvent but does not dissolve the dyes; separating a precipitate from the resulting mixture; and separating the second solvent.