Patents by Inventor Junji Niwa

Junji Niwa 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).

  • Contact lens cleaning solution and method for cleaning contact lenses using the same
    Patent number: 6008170
    Abstract: The present invention provides a contact lens cleaning solution which is capable of, simultaneously and in a simplified manner, rendering surfaces of the contact lens hydrophilic and cleaning the contact lens for removal of protein deposits, without suffering from reduction of the cleaning effect of a protease, and also provides a method of cleaning a contact lens which is capable of rendering the surfaces of the contact lens hydrophilic while, at the same time, cleaning the contact lens for removal of the protein deposits, by using the contact lens cleaning solution as described above.A desired contact lens cleaning solution is prepared, which contains a protease in an amount effective for removing protein adhering or clinging to the contact lens and gum arabic as a hydrophilicity rendering component, wherein divalent metal ions in the gum arabic are removed or inactivated.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: December 28, 1999
    Assignee: Tomey Technology Corporation
    Inventors: Shinji Tanaka, Kenji Narushima, Junji Niwa, Emi Tanimoto