Patents by Inventor Quang T. Nguyen

Quang T. Nguyen 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).

  • Cellulose ester blend membranes, process for making same and their use
    Patent number: 5611930
    Abstract: A method for removing C.sub.1 -C.sub.3 alkanols from their mixtures with hydrocarbons or heteroatom-containing hydrocarbons wherein the method comprises utilizing a membrane comprising a non-porous separation layer of cellulose ester containing polymeric materials, characterized in that said polymeric material is a polymer blend of a first polymer selected from cellulose esters and at least one second polymer selected from polyvinyl pyrrolidone (PVP), copolymers of vinyl pyrrolidone and vinyl acetate (VP-co-VA), polyethylene glycol (PEG), N,N,-dialkylated polyacrylic amide (DPAA) and cellulose esters other than said first polymer.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: March 18, 1997
    Assignee: Deutsche Carbone AG
    Inventors: Quang T. Nguyen, Jean M. L. N eel, Hartmut E. A. Br uschke, Hermann Steinhauser
  • Composition membrane for separating water from fluids containing organic components by means of pervaporation
    Patent number: 5334314
    Abstract: Composite membrane-for separating water from fluid mixtures containing organic components by means of pervaporation comprising a separating layer of cross-linked polyvinyl alcohol, which has been subjected to a post-cross-linking by treatment with acids acting in the vapor phase on the polyvinyl alcohol layer. The acids are preferably hydrohalic acids, sulfurous acid, sulfuric acid, nitrous acid, nitric acid or acetic acid.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: August 2, 1994
    Assignee: Deutsche Carbone AG
    Inventors: Jean M. L. Neel, Quang T. Nguyen, Hartmut Bruschke