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:
Jul. 20, 1982
Filed:
Dec. 28, 1979
Mashahiro Mishiro, Moriyama, JP;
Tokio Nishikawa, Hikone, JP;
Shigeyasu Ohashi, Moriyama, JP;
Yasuo Yokokawa, Tanashi, JP;
Asahi Kasei Kogyo Kabushiki, Osaka, JP;
Abstract
The invention concerns a membrane filtration type hollow fiber. It is composed of a single material phase which material is a chain high polymer and capable of forming fibers by the spinning of the high polymer. The cylindrical wall defining the hollow fiber represents a three-dimensional net-like structure of fine filtering passages of 0.05 to 1 micron, preferably 0.1 to 1 micron. This structure occupies substantially the whole mass of the tubular wall or a closed ring band zone when seen in any cross-section of the wall, providing thus an effective and active filtering zone. The pore rate amounts to at least 55%, and active points of the filtering passages for governing minimum passable sizes of the passages for solids included in a filtering liquor to be treated upon are distributed at random throughout at least the active zone. These sizes are nearly uniform.