Patents by Inventor Isao Joukou

Isao Joukou 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).

  • Sustained release aromatic
    Patent number: 4880774
    Abstract: A sustained release aromatic comprises a clathrate compound composed of a perfume and a polyphenyl compound and gives out fragrance slowly but steadily over a long period of time. It is produced by a process comprising melting under heat a perfume which is a solid at an ordinary room temperature, and adding a polyphenyl compound to the molten perfume. Alternatively, a perfume which is a liquid at an ordinary room temperature is mixed with a polyphenyl compound so that they may react with each other, and a solid reaction product is separated from their mixture.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: November 14, 1989
    Assignee: Kurita Water Industries, Ltd.
    Inventors: Isao Joukou, Ayako Sekikawa, Hideo Sugi, Kenji Tahara