Patents by Inventor Shinzo Ohkado

Shinzo Ohkado 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).

  • Soft contact composition and method
    Patent number: 4699934
    Abstract: A soft contact lens is provided by: pouring an excess amount of an original solution for producing a soft contact lens into a concave mold; placing a convex mold on said concave mold and overflowing the excess of said original solution to thereby uniformly fill said original solution in a space between said concave mold and said convex mold; gelling said original solution between the two molds to form therebetween a lens having a tensile strength of at least about 0.1 kgf/cm.sup.2 ; immersing said lens and said two molds in a liquid to peel said lens from said molds; and extracting the thus-peeled lens via an extraction treatment with water.
    Type: Grant
    Filed: July 28, 1983
    Date of Patent: October 13, 1987
    Assignee: Toray Industries, Inc.
    Inventors: Shinzo Ohkado, Hideki Kenjo