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:
Sep. 29, 1992
Filed:
Aug. 30, 1991
Mordechai Perry, Petach Tikva, IL;
Henia Yacubowicz, Ness Ziona, IL;
Charles Linder, Rehovot, IL;
Mara Nemas, Neve Monosson, IL;
Reuven Katraro, Rishon Lezion, IL;
Membrane Products Kiryat Weizmann Ltd., Rehovot, IL;
Abstract
Composite solvent stable membranes for treating organic liquids comprise a crosslinked layer of less than 5 microns in thickness supported on a solvent stable porous membrane substrate, which layer includes at least one polymer selected from polyphenylene oxide type polymers and polysulfone type polymers, provided that the crosslinked layer includes at least one polymer derived from haloalkylated polyphenylene oxide type monomers. Such composite membranes include solvent stable membranes which swell to an extent of no more than about 10% when immersed in various organic solvents, and their mixtures with each other and/or water.