Patents by Inventor Takao Kamohara

Takao Kamohara 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).

  • Aqueous polyurethane fluid dispersion and method for producing the same
    Patent number: 8148462
    Abstract: Disclosed is an aqueous polyurethane obtained by reacting a sulfonate containing a hydrophilic group represented by the following general formula (1): (in which M represents an alkali metal atom or an ammonium, and p represents an integer of 2 to 20) and an amino group with a polyurethane prepolymer having an isocyanate group at an end thereof, characterized in that the hydrophilic group represented by the general formula (1) bonds with a urea bond moiety of the polyurethane.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: April 3, 2012
    Assignee: Tosoh Corporation
    Inventor: Takao Kamohara
  • AQUEOUS POLYURETHANE FLUID DISPERSION AND METHOD FOR PRODUCING THE SAME
    Publication number: 20090312488
    Abstract: Disclosed is an aqueous polyurethane obtained by reacting a sulfonate containing a hydrophilic group represented by the following general formula (1): (in which M represents an alkali metal atom or an ammonium, and p represents an integer of 2 to 20) and an amino group with a polyurethane prepolymer having an isocyanate group at an end thereof, characterized in that the hydrophilic group represented by the general formula (1) bonds with a urea bond moiety of the polyurethane.
    Type: Application
    Filed: July 6, 2007
    Publication date: December 17, 2009
    Inventor: Takao Kamohara