Patents by Inventor Kazuo Asai

Kazuo Asai 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).

  • Patent number: 5181142
    Abstract: A plastic lens having an anti-reflecting and hard coat layer is provided. The anti-reflecting layer is formed by coating a lens with a hard coat solution containing at least one oxide sol, hardening the coated solution to give a hard coat layer and immersing the lens into an acidic or alkaline solution to dissolve the oxide particles contained in the hard coat layer so as to make the layer ununiform. The anti-reflecting effect of the formed layer is equivalent to that of a conventional anti-reflecting film consisting of three or more than three layers.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: January 19, 1993
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Kazuo Asai, Masaharu Kikuchi
  • Patent number: 5116644
    Abstract: A plastic lens having an anti-reflecting and hard coat layer is provided. The anti-reflecting layer is formed by coating a lens with a hard coat solution containing at least one oxide sol, hardening the coated solution to give a hard coat layer and immersing the lens into an acidic or alkaline solution to dissolve the oxide particles contained in the hard coat layer so as to make the layer non-uniform.The anti-reflecting effect of the formed layer is equivalent to that of a conventional anti-reflecting film consisting of at least three layers.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: May 26, 1992
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Kazuo Asai, Masaharu Kikuchi