Patents by Inventor Takeshi Tobinaga

Takeshi Tobinaga 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).

  • Publication number: 20040224234
    Abstract: The invention relates to a process for production of a composite article comprising:
    Type: Application
    Filed: October 9, 2001
    Publication date: November 11, 2004
    Inventors: Stephan Bauer, Bernd Bronstert, Helmut Mohwald, Takeshi Tobinaga
  • Patent number: 4358570
    Abstract: A binder composition for foundry sands comprises (a) a polyisocyanate compound (e.g., polymethylene polyisocyanate), (b) a polyol compound (e.g., a polyol compound having as its principal constituent a polyether polyol of being at least bifunctional), and (c) an alkylphenol and/or an alkylphenol derivative (e.g., nonylphenol). In this binder composition, the equivalent weight ratio of the isocyanate group of component (a) and the hydroxyl group of component (b) is from 0.3:1 to 3:1, and the quantity of component (c) is 3 to 150 parts by weight relative to 100 parts by weight of the sum of the quantities of components (a) and (b).
    Type: Grant
    Filed: September 16, 1980
    Date of Patent: November 9, 1982
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventor: Takeshi Tobinaga
  • Patent number: 4352914
    Abstract: A novel binder composition for foundry sand molds or cores comprises (a) an organic polyisocyanate compound and (b) a certain polyol compound selected from a formaldehyde-modified bisphenol and a formaldehyde-modified cyclic ketone, or a partially alkoxylated derivative of the polyol compound, the ratio of the component (a) to the component (b) being in the specific range.
    Type: Grant
    Filed: October 2, 1981
    Date of Patent: October 5, 1982
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventor: Takeshi Tobinaga