Patents by Inventor E-Won Choe

E-Won Choe 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).

  • Biaxially oriented films containing layers of polyethylene naphthalate bibenzoate (PENBB) and process for the production of these films
    Patent number: 5919536
    Abstract: Biaxially oriented films containing at least one layer of polyethylene naphthalate bibenzoate (PENBB) copolyester wherein the copolyester contains from about 60 to about 40 mol % of a first recurring unit of the formula (II). ##STR1## and about 40 to about 60 mol % of a second recurring unit of formula (I). The copolyester preferably contains less than 10 mol % of recurring units derived from terephthalate or other dicarboxylic acids. The films have a total thickness of 0.05-500 .mu.m and may contain inert particles.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: July 6, 1999
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Cynthia Bennett, Bodo Kuhmann, Bennett Clayton Ward, E-Won Choe, John Anthony Flint
  • Copolyester compositions comprising poly(ethylene naphthalate bibenzoate) biaxially oriented copolyester films
    Patent number: 5674589
    Abstract: A copolyester composition comprising poly(ethylene naphthalate bibenzoate) ("PENBB") and 0.001 to 5% by weight of fine silica particles having an average diameter of 0.01 to 3.0 .mu.m. Further, films are made from this copolyester composition.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: October 7, 1997
    Assignee: Hoechst Celanese Corp.
    Inventors: Cynthia Bennett, E-Won Choe, John Anthony Flint, Bodo Kuhmann