Patents by Inventor Kokyo Kusunoki

Kokyo Kusunoki 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).

  • Process for producing non-combustible gypsum board and non-combustible laminated gypsum board
    Patent number: 4645548
    Abstract: A novel process for producing a non-combustible gypsum board and a non-combustible laminated gypsum board having superior practical physical properties, smoothly and efficiently is provided, which process is characterized by preparing a mixture consisting of a powdery gypsum consisting of 50 to 95 parts by weight of a hydrating gypsum and 5 to 50 parts by weight of gypsum dihydrate, a definite amount of fibers and a definite amount of a caking retarder and a necessary amount of water; molding the mixture before the hydrating gypsum is hydrated; and setting and drying the resulting molded material.
    Type: Grant
    Filed: February 5, 1985
    Date of Patent: February 24, 1987
    Assignees: Onoda Cement Co Ltd, Asahi Asbestos Co Ltd
    Inventors: Takao Take, Katsuaki Kaneko, Kokyo Kusunoki, Toshinobu Ichiba