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:
May. 07, 2002
Filed:
Jan. 05, 2000
Minoru Inada, Ibaraki-ken, JP;
Tatsuhide Hosomi, Ibaraki-ken, JP;
Toshiaki Asoh, Ibaraki-ken, JP;
Makoto Mizutani, Ibaraki-ken, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
A process for purifying a polycarbonate resin solution which comprises passing a water-in-oil dispersion type (W/O) emulsion composed of a mixture of an organic solvent solution containing a polycarbonate resin with a aqueous solution and having water particles with an average diameter of 1 to 100 &mgr;m in an oil through a metallic filter having a filtering precision of 10 to 200 &mgr;m, and then, settling the mixture for 1 to 30 minutes to perform separation between the organic solvent solution containing a polycarbonate resin and the aqueous solution containing contaminations.