Patents by Inventor Kei Yamasaki

Kei Yamasaki 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).

  • Alcohol compound, a polyester resin, an unsaturated particle resin, a resin particle and an electrophotographic toner
    Patent number: 8828636
    Abstract: It is an object of the present invention to provide a new alcohol compound, a polyester resin, an unsaturated polyester resin, a resin particle and an electrophotographic toner using the compound capable of using the renewable resources as a part of a raw material. An alcohol compound according to the present invention is characterized by representing the chemical formula [Chemical 1]. Furthermore, the polyester resin or the unsaturated polyester resin according to the present invention, is characterized in that the compound (wherein X is an aliphatic or an aromatic residue, Y is a refined rosin residue, a disproportionated rosin residue or a hydrogenated rosin residue, and n=0 to 1 in the formula.) is an essential component of an alcohol component. Further, the resin particle of the present invention is characterized by comprising the polyester resin.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: September 9, 2014
    Assignee: Japan U-Pica Company, Ltd.
    Inventors: Tetsuji Moroiwa, Nobutaka Yoshida, Hiroshi Aihara, Akira Yamane, Kei Yamasaki, Keiko Taniuchi
  • ALCOHOL COMPOUND, A POLYESTER RESIN, AN UNSATURATED POLYESTER RESIN, A RESIN PARTICLE AND AN ELECTROPHOTOGRAPHIC TONER
    Publication number: 20130071785
    Abstract: It is an object of the present invention to provide a new alcohol compound, a polyester resin, an unsaturated polyester resin, a resin particle and an electrophotographic toner using the compound capable of using the renewable resources as a part of a raw material. An alcohol compound according to the present invention is characterized by representing the chemical formula [Chemical 1]. Furthermore, the polyester resin or the unsaturated polyester resin according to the present invention, is characterized in that the compound (wherein X is an aliphatic or an aromatic residue, Y is a refined rosin residue, a disproportionated rosin residue or a hydrogenated rosin residue, and n=0 to 1 in the formula.) is an essential component of an alcohol component. Further, the resin particle of the present invention is characterized by comprising the polyester resin.
    Type: Application
    Filed: March 2, 2011
    Publication date: March 21, 2013
    Applicant: Japan U-Pica Company, Ltd.
    Inventors: Tetsuji Moroiwa, Nobutaka Yoshida, Hiroshi Aihara, Akira Yamane, Kei Yamasaki, Keiko Taniuchi