Patents by Inventor Kouji Koyanagi

Kouji Koyanagi 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).

  • Liquid amine composition for emulsifiers for bitumen
    Patent number: 6048905
    Abstract: The present invention provides a liquid amine composition for an emulsifier for bitumen which can impart, to a bituminous emulsion, more excellent emulsifying stability and adhesive properties to aggregates than conventional products. The liquid amine composition for the emulsifier for bitumen of the present invention comprises (1) 5 to 70% by weight a monoamine having an aliphatic hydrocarbyl group of 8 to 22 carbon atoms, (2) 20 to 80% by weight of a polyamine having an aliphatic hydrocarbyl group of 8 to 22 carbon atoms, and (3) 10 to 75% by weight of an organic acid of 4 to 18 carbon atoms.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: April 11, 2000
    Assignee: Kao Corporation
    Inventors: Katsuhiko Asamori, Shigeru Nagao, Ryoichi Tamaki, Takao Taniguchi, Keiichiro Tomioka, Kouji Koyanagi