Liquid purification or separation – Filter – Material
Reexamination Certificate
2005-03-29
2008-11-11
Fortuna, Ana M (Department: 1797)
Liquid purification or separation
Filter
Material
C210S500340, C210S500230, C210S490000, C210S500270, C264S041000, C428S310500
Reexamination Certificate
active
07449112
ABSTRACT:
A novel polyvinyl alcohol-based polymer membrane is disclosed. The novel polyvinyl alcohol-based polymer membrane of the present invention comprises two different compounds which are crosslinked by irradiating light such as UV or electronic beams or heat treatment to form a covalent bond between double bonds thereby providing improved properties such as chemical resistance and durability. This invention also relates to a process its preparation.
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Ahn Sang-Man
Chang Bong-Jun
Choi Seung-Hak
Ha Jong-Wook
Kim Dong-Kwon
Finnegan Henderson Farabow Garrett & Dunner LLP
Fortuna Ana M
Korea Research Institute of Chemical Technology
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