Patents by Inventor Izumi Nishio

Izumi Nishio 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).

  • Collapsible gel compositions
    Patent number: 5100933
    Abstract: Ionized crosslinked polyacrylamide gels are provided that are capable of drastic volume changes in response to minor changes in solvent concentration, temperature of pH or salt concentration of the solvent. The gels can contain a metal ion.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: March 31, 1992
    Assignee: Massachusetts Institute of Technology
    Inventors: Toyoichi Tanaka, Izumi Nishio, Shao-Tang Sun
  • Collapsible gel compositions
    Patent number: RE35068
    Abstract: Ionized crosslinked polyacrylamide gels are provided that are capable of drastic volume changes in response to minor changes in solvent concentration, temperature of pH or salt concentration of the solvent. The gels can contain a metal ion.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: October 17, 1995
    Assignee: Massachusetts Institute of Technology
    Inventors: Toyoichi Tanaka, Izumi Nishio, Shao-Tang Sun