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. 21, 1998
Filed:
Aug. 17, 1995
Toyo Boseki Kabushiki Kaisha, Osaka-Fu, JP;
Abstract
A composite hollow fiber membrane is provided, which includes a microporous hollow fiber support membrane and a polymeric ultrathin layer formed on the outer surface of the microporous hollow fiber support membrane by interfacial polymerization, and which contains an organic fluorine compound. Also provided is a process for its production, in which a microporous hollow fiber support membrane is successively contacted with first and second solutions involved in the polymerization, but it is further contacted with a third liquid which is substantially immiscible with the first and/or second solutions and which contains an organic fluorine compound, before and/or after contact with the second solution. Thus, it becomes possible to produce a composite hollow fiber membrane exhibiting excellent permeability and selectivity performance in a continuous and stable manner.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile