Patents by Inventor Edward J. Woo

Edward J. Woo 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).

  • Optical recording medium with antistatic hard coating
    Patent number: 5176943
    Abstract: The present invention concerns perfluoro-based antistatic compositions comprising 0.5 to 5.0 parts by weight of an ionic perfluoro surfactant and 0.5 to 5.0 parts by weight of a nonionic perfluoro surfactant in admixture with 100 parts by weight of nonfluorinated, copolymerizable, radiation curable prepolymers as well as antistatic hard coatings prepared from these compositions. The present invention also concerns optical recording media having such antistatic hard coatings provided on at least one surface.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: January 5, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Edward J. Woo
  • Process for improved adhesion to semicrystalline polymer film
    Patent number: 4824699
    Abstract: The present invention relates to a process for adhering coatings directly to semicrystalline polymer films. The surface of the film is first rendered quasi-amorphous. The quasi-amorphous surface is then either (a) washed with a solvent for amorphous polyester and then coated or (b) coated and heated to a temperature to recrystallize the surface of the polymer. These treatments improve both the consistency and strength of the bond between the coating and the polymer surface.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: April 25, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Edward J. Woo, Elaine M. Yorkgitis