Patents by Inventor Toyoichi Tanaka

Toyoichi Tanaka 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 of preparing an anti-fouling coating
    Publication number: 20030194491
    Abstract: A method of preparing an anti-fouling coating, the method including the steps of soaking polymeric gel beads in the presence of a solution including a solvent and a biocide to swell the gel beads and absorb both the solvent and the biocide therein, evaporating the solvent, rinsing any biocide of the surface of the beads, and mixing the beads in a coating material.
    Type: Application
    Filed: July 17, 2002
    Publication date: October 16, 2003
    Inventors: Harris Gold, Rhonda D. Levy, Marina Temchenko, Thomas H.E. Mendum, Toyoichi Tanaka, Takashi Enoki, Guoqiang Wang, Tomoko Tanaka
  • Polymeric phase transition artificial receptors, antibodies, and enzymes
    Patent number: 5801221
    Abstract: Multiple-phase transition copolymers are formed which can selectively bind and release a chemical, or which can selectively catalyze a specific chemical reaction.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: September 1, 1998
    Assignee: Massachusetts Institute of Technology
    Inventors: Toyoichi Tanaka, Masahiko Annaka, Saturo Masamune
  • Interpenetrating-polymer network phase-transition gels
    Patent number: 5580929
    Abstract: An interpenetrating gel and a method of forming an interpenetrating gel which undergoes a significantly large volume change in response to a physical or chemical stimululs is disclosed.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: December 3, 1996
    Assignee: Massachusetts Institute of Technology
    Inventors: Toyoichi Tanaka, Franck Ilmain, Etsuo Kokufuta, Masahiko Annaka
  • Interpenetrating-polymer network phase-transition gels
    Patent number: 5403893
    Abstract: An interpenetrating gel and a method of forming an interpenetrating gel which undergoes a significantly large volume change in response to a physical or chemical stimululs is disclosed.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: April 4, 1995
    Assignee: Massachusetts Institute of Technology
    Inventors: Toyoichi Tanaka, Franck Ilmain, Etsuo Kokufuta, Masahiko Annaka
  • Salt tolerant super absorbents
    Patent number: 5274018
    Abstract: The invention relates to a novel absorbent composition and manner of using the same. The absorbent has at least the following two components:(a) a swellable hydrophobic polymer being capable of absorbing a quantity of water which is at least about 10 times the dry weight of said polymer; and(b) an amount of an ionizable surfactant sufficient to form at least a monolayer of said surfactant about said polymer.The novel absorbent is substantially tolerant to an aqueous solution having a soluble salt, such as sodium chloride.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: December 28, 1993
    Assignee: Massachusetts Institute of Technology
    Inventors: Toyoichi Tanaka, Yong-Qing Zhang
  • Photo-induced reversible, discontinuous volume changes in gels
    Patent number: 5242491
    Abstract: Novel gel compositions are provided which exhibit a drastic discontinuous volume change when exposed to or shielded from light energy.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: September 7, 1993
    Assignee: Massachusetts Institute of Technology
    Inventors: Akira Mamada, Toyoichi Tanaka, Dawan Kungwatchakun, Masahiro Irie
  • 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
  • Reversible, discontinuous volume changes of ionized isopropylacrylamide cells
    Patent number: 4732930
    Abstract: An ionic gel formed by polymerization of isopropylacrylamide in the presence of an ion-containing monomer, a crosslinking agent and a suitable liquid medium is provided. The gel is capable of drastic volume change in response to solvent composition, temperature, pH, or ion composition.
    Type: Grant
    Filed: May 20, 1985
    Date of Patent: March 22, 1988
    Assignee: Massachusetts Institute of Technology
    Inventors: Toyoichi Tanaka, Yoshitsugu Hirokawa
  • 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