Patents by Inventor Hiroshi Shibahara

Hiroshi Shibahara 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 particulate production of condensate of aldehyde compound and phenol compound
    Patent number: 4542204
    Abstract: A method for a condensate of an aldehyde compound and a phenol compound, said method comprising dispersing a viscous condensate obtained by the reaction of an aldehyde compound with a phenol compound into cold water or hot water by the aid of a dispersing agent, and then solidifying said condensate.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: September 17, 1985
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Shibahara, Hiromitsu Tachibana
  • Method for suppressing bubbling in polymerization of vinyl chloride resin
    Patent number: 4455413
    Abstract: A method for production of vinyl chloride resin is provided, in which vinyl chloride or a monomeric mixture containing vinyl chloride as a major ingredient is polymerized, while controlling the operation of a reflux condenser provided at a polymerization vessel by supplying hot water or steam and then cooling water to the side of cooling water of the condenser, whereby bubbling is suppressed. The method provides outstanding advantages, such as, a high quality product improved with respect to fish eyes, high productivity, a shortened polymerization time, and a savings in steam for heating.
    Type: Grant
    Filed: June 22, 1982
    Date of Patent: June 19, 1984
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Tomishima, Teiji Kobayashi, Hiroshi Shibahara, Yasuhiro Nojima