Patents by Inventor Kohei Umetani

Kohei Umetani 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).

  • Phosphorus-containing condensation products, their production and their use as flame retardants
    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
  • Process for treating textile articles
    Patent number: 4095945
    Abstract: Textile materials are rendered flame retardant by applying a phosphorus-containing condensation product, a nitrogen-phosphorus-containing condensation product and an aminoplast precondensate to the textile material, and fixing them on the textile material.
    Type: Grant
    Filed: July 23, 1976
    Date of Patent: June 20, 1978
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Kohei Umetani, Masakazu Date