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. 20, 1989
Filed:
Apr. 11, 1986
Tatuo Nejigaki, Fuji, JP;
Yoshimi Kakutani, Fuji, JP;
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Abstract
A process for sterilizing a filtration device which comprises employing therein a hollow fiber type module having hollow fibers of heat resistant polymer with a heat distortion temperature of 70.degree. C. or higher under a load of 18.6 kg/cm.sup.2 and with a pore diameter of less than 0.45 .mu.m and having a difference in average linear expansion coefficient between the sealing material for fixing the end portions of the hollow fibers in the module case, at a temperature of 20.degree.-121.degree. C. of 7.times.10.sup.-5 /.degree. C. or lower, and passing steam from the raw water side of the module to the filtrate side thereof, while withdrawing all or a part of the raw water and filtrate which partially fill the module or alternatively after withdrawal of raw water and filtrate.