Patents by Inventor Syu-ichi Yamagiwa

Syu-ichi Yamagiwa 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).

  • Acid halide derivatives, their production, and production of indanonecarboxylic acid esters using the same
    Patent number: 6916946
    Abstract: Disclosed is a novel acid halide derivative represented by Formula (I): wherein X and Y may be the same or different and are each a halogen atom; and R is a lower alkyl group. By cyclizing the acid halide derivative of Formula (I) in the presence of a catalyst, an indanonecarboxylic acid ester represented by Formula (VI): wherein X and R are as defined above, is produced. Such indanonecarboxylic acid esters are useful as intermediates for insecticides.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: July 12, 2005
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Satoru Nose, Kieko Sano, Syu-ichi Yamagiwa, Takeshi Hamatani
  • Novel acid halide derivatives, their production, and production of indanonecarboxylic acid esters using the same
    Publication number: 20050043568
    Abstract: Disclosed is a novel acid halide derivative represented by Formula (I): wherein X and Y may be the same or different and are each a halogen atom; and R is a lower alkyl group. By cyclizing the acid halide derivative of Formula (I) in the presence of a catalyst, an indanonecarboxylic acid ester represented by Formula (VI): wherein X and R are as defined above, is produced. Such indanonecarboxylic acid esters are useful as intermediates for insecticides.
    Type: Application
    Filed: March 11, 2004
    Publication date: February 24, 2005
    Inventors: Satoru Nose, Kieko Sano, Syu-ichi Yamagiwa, Takeshi Hamatani