Patents by Inventor Tsukasa Fujii

Tsukasa Fujii 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).

  • Lubricants for and methods of processing synthetic fibers
    Patent number: 5980772
    Abstract: Synthetic fibers can be effectively lubricated by applying a lubricant containing one or more organic phosphoric acid ester compounds such as acidic phosphoric acid ester of the form ##STR1## where R.sup.1, R.sup.2, X.sup.1 and X.sup.2 are each of a specified structure and integers m, p and q satisfy certain conditions.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: November 9, 1999
    Assignee: Takemoto Yushi Kabushiki Kaisha
    Inventors: Tsukasa Fujii, Michiharu Nagai
  • Methods of and agents for lubricating synthetic fibers
    Patent number: 5942176
    Abstract: Synthtic fibers can be effectively lubricated by applying a lubricant containing polyether polyester block copolymer shown as follows: ##STR1## where X, Z, A.sup.1, Y.sup.1, and R.sup.1 are each of a specified structure and integers a, b, c, p and q satisfy certain conditions.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: August 24, 1999
    Assignee: Takemoto Yushi Kabushiki Kaisha
    Inventors: Tsukasa Fujii, Michiharu Nagai, Yukio Komatsu, Yasushi Maeshima
  • Lubricants for and methods of processing synthetic fibers
    Patent number: 5916474
    Abstract: Synthetic fibers are processed under a specified condition by applying a lubricant containing a polyether polyester nitrogenous compound with numerically averaged molecular weight 500-20000 obtained by ring-opening polymerization of hydroxyl group of fatty alkanol nitrogenous compound of a specified kind with alkylene oxide with 2-4 carbon atoms to form polyalkoxylated block and ring-opening polymerization of end hydroxyl group of this polyalkoxylated block with .epsilon.-caprolactone to form polycarbonylpentoxy block. An acylated polyether polyester nitrogenous compound obtainable by acylating such polyether polyester nitrogenous compound with an acylation reagent of a specified kind may also be used as the lubricant. The lubricant may further contain aliphatic ester of a specified kind at a specified ratio.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: June 29, 1999
    Assignee: Takemoto Yushi Kabushiki Kaisha
    Inventors: Tsukasa Fujii, Yukio Komatsu, Yasushi Maeshima