Patents by Inventor Juchui R. Lin

Juchui R. Lin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Membrane from epoxy-direct grafted halogenated vinyl polymer
    Patent number: 5418053
    Abstract: A membrane useful as an ultrafiltration or reverse osmosis membrane is formed from the casting onto a substrate such as a porous polyester sheet a material comprising an epoxy- or trimethylene ether-direct grafted halogenated vinyl polymer prepared by the reaction of an epoxide such as a 5-ethyl,5'-methyl-hydantoin/epichlorohydrin condensation product with a halogenated vinyl polymer such as polyvinylidene fluoride in the presence of a metal halide catalyst. The ether residue of the epoxide or trimethylene-containing group is grafted directly to the first carbon-chain carbon of the halogenated vinyl polymer.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: May 23, 1995
    Assignee: Koch Membrane Systems, Inc.
    Inventor: Juchui R. Lin
  • Epoxide-direct grafted halogenated vinyl polymers
    Patent number: 5350805
    Abstract: An epoxy or trimethylene ether-direct grafted halogeneated vinyl polymer is prepared by the reaction of an epoxide such as a 5-ethyl, 5'-methyl-hydantoin/epichlorogydrin condensation product with a halogenated vinyl polymer such as polyvinylidene fluoride in the presence of a metal halide catalyst. The ether residue of the epoxide is grafted directly to the first carbon-chain carbon of the halogenated vinyl polymer. The graft polymer compositions are utilized as ultrafiltration and reverse osmosis membranes.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: September 27, 1994
    Assignee: Koch Membrane Systems, Inc.
    Inventor: Juchui R. Lin