Patents by Inventor Kisaki Maezawa

Kisaki Maezawa 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).

  • Cleaning-preserving aqueous solution for contact lenses and method for cleaning and disinfecting a contact lens by means thereof
    Patent number: 5401431
    Abstract: A cleaning-preserving aqueous solution for contact lenses, which contains, as a surfactant, a tetra-fatty acid polyoxyethylene sorbitol of the formula 1: ##STR1## wherein a+b+c+d+e+f=20 to 50, and four among R.sub.1 to R.sub.6 are C.sub.12-18 saturated or unsaturated fatty acid residues and the remaining two are hydrogen atoms, and which has a physiological osmotic pressure and has a pH adjusted to a level of from 4 to 9.
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: March 28, 1995
    Assignee: Tomei Sangyo Kabushiki Kaisha
    Inventors: Akira Nakagawa, Kisaki Maezawa