Patents by Inventor Toshiya Aoki

Toshiya Aoki 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 for producing aliphatic o-arylurethanes
    Patent number: 4925971
    Abstract: A method for producing aliphatic O-arylurethanes by the reaction of an aliphatic primary amine with an aromatic hydroxyl compound and urea. Ammonia produced as a by-product in the reaction is removed during the reaction so that the ammonia concentration of the reaction solution is maintained at 2 wt % or less.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: May 15, 1990
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Toshiya Aoki, Hiroshi Ishida, Shinsuke Fukuoka