Patents by Inventor Minako Oka

Minako Oka 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).

  • Immobilized alcohol utidase for use in an alcohol measuring apparatus
    Patent number: 5190872
    Abstract: Alcohol oxidase is immobilized by bonding an aminosilane coupling agent to a carrier, bonding a multifunctional aldehyde such as glutaraldehyde to an amino group of the aminosilane, washing the carrier to remove free multifunctional aldehyde and bonding alcohol oxidase to the multifunctional aldehyde bonded to the aminosilane. Washing to remove free multifunctional aldehyde enables immobilizing a one molecule thickness of alcohol oxidase on the carrier since free multifunctional aldehyde is not present to cross-link alcohol oxidase molecules together. A thin layer of alcohol oxidase is advantageous when assaying for alcohol since a thin layer does not retain hydrogen peroxide that can deactivate alcohol oxidase. The carrier preferably contains hydroxyl groups and is porous, and can be a silicate-containing carrier such as diatomaceous earth or fire brick.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: March 2, 1993
    Assignee: Kanzaki Paper Mfg. Co., Ltd.
    Inventors: Yoshio Hashizume, Akio Kariyone, Ryuzo Hayashi, Minako Oka