Patents by Inventor Yuko Sahashi

Yuko Sahashi 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).

  • Enzyme immobilization in an anisotropic ultrafiltration membrane
    Patent number: 4963494
    Abstract: An enzyme immobilized membrane comprising an anisotropic ultrafiltration membrane having a porous layer and a dense layer, and an enzyme immobilized therein is disclosed. The porous layer of the ultrafiltration membrane retains a water-soluble polymer having at least two functional groups in the crosslinked state, and the enzyme is covalently bonded to the membrane through the functional groups of the polymer. Preferably, the membrane is prepared from polysulfone. The enzyme immobilized membrane is produced by a process which comprises impregnating a solution of the water-soluble polymer into the porous layer of the ultrafiltration membrane under a pressure of 0.1 to 1.0 kg/cm.sup.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: October 16, 1990
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Ken Hibino, Takeshi Okada, Kazuo Nakao, Yuko Sahashi
  • Vermin exterminating element and vermin exterminating method using it
    Patent number: 4921703
    Abstract: A vermin exterminating element comprising a culture carrier having culture medium components containing vermin infectious microorganisms and/or the spores of the vermin infectious microorganisms cultivated therein, and a vermin exterminating method using the same.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: May 1, 1990
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Toshio Higuchi, Ken Hibino, Rikako Yoshii, Takayuki Hiyori, Yoshinori Miyamoto, Eiichiro Fukusaki, Takeo Matsumura, Yoshiko Hashimoto, Michiko Kikuma, Yuko Sahashi, Takeshi Okada