Patents by Inventor Yoshiko Oi

Yoshiko Oi 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).

  • Method for cleaning, preserving and disinfecting contact lenses
    Patent number: 5409546
    Abstract: A method for cleaning and preserving a contact lens, characterized by using a treating solution containing an effective amount of a serine protease derived from bacteria belonging to genus Bacillus, a metal chelating agent, and boric acid and/or borax which stabilizes the serine protease at room temperature and having the osmotic pressure adjusted to a level of from 200 to 600 mOsm/kg-water, which method comprises dispensing the treating solution at the time of treatment, and immersing a contact lens in the dispensed treating solution.
    Type: Grant
    Filed: October 8, 1993
    Date of Patent: April 25, 1995
    Assignee: Tomei Sangyo Kabushiki Kaisha
    Inventors: Akira Nakagawa, Yoshiko Oi
  • Liquid composition for contact lenses and method for cleaning a contact lens
    Patent number: 5281277
    Abstract: A liquid composition for contact lenses, having from 5 to 40% (w/v) of glycerol and from 4 to 20% (w/v) of boric acid and/or a borate incorporated to a solution containing an effective amount of a protease, in such a ratio that the boric acid and/or the borate is from 10 to 100 parts, preferably 10-20 parts, by weight per 100 parts by weight of the glycerol.
    Type: Grant
    Filed: April 8, 1992
    Date of Patent: January 25, 1994
    Assignee: Tomei Sangyo Kabushiki Kaisha
    Inventors: Akira Nakagawa, Satoko Kondo, Yoshiko Oi