Patents by Inventor Kiyonori Kawai

Kiyonori Kawai 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).

  • Patent number: 4166897
    Abstract: Process for producing a water-soluble phosphorus-containing condensation product having a molar ratio P--CH.sub.2 --P linkage/P--CH.sub.2 OCH.sub.2 --P linkage of 0.8-4.0 by heating a tetrakis(hydroxymethyl)phosphonium compound under reduced pressure and acid conditions to condense it by dehydration and deformaldehydation reaction. This condensation product can be used for rendering textile articles flame retardant.
    Type: Grant
    Filed: August 2, 1976
    Date of Patent: September 4, 1979
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kohei Umetani, Masakazu Date, Kiyonori Kawai