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. 17, 2009
Filed:
Oct. 17, 2006
Shin-ichi Minegishi, Shiga, JP;
Masahiro Henmi, Shiga, JP;
Toshiyuki Ishizaki, Shiga, JP;
Koichi Dan, Shiga, JP;
Shin-Ichi Minegishi, Shiga, JP;
Masahiro Henmi, Shiga, JP;
Toshiyuki Ishizaki, Shiga, JP;
Koichi Dan, Shiga, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A method of producing a hollow fiber membrane includes discharging a polyvinylidene fluoride solution comprising a polyvinylidene fluoride resin and a poor solvent at a temperature above a phase separation temperature into a cooling bath at a temperature below the phase separation temperature to coagulate the polyvinylidene fluoride resin. The hollow fiber membrane comprises a polyvinylidene fluoride resin having spherical structures that have an average diameter in the range of 0.3 to 30 μm.