Patents by Inventor Misunori Shimura

Misunori Shimura 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).

  • Process for the preparation of naphthalene carboxylic acids
    Patent number: 5055612
    Abstract: A process for the preparation of naphthalene mono or polycarboxylic acids, such as 2,6-naphthalene dicarboxylic acid, is disclosed which includes oxidizing a naphthalene compound such as 2,6-diisopropylnaphthalene in a specific solvent with molecular oxygen in the presence of a catalyst containing a heavy metal compound and a bromine compound. The solvent is an aliphatic monocarboxylic acid and may further contain benzene and/or water. By controlling the ratio of the amount of catalyst metal to the feed rate of the raw material naphthalene compound, the yield of desired product can be controlled.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: October 8, 1991
    Assignees: NKK Corporation, Chiyoda Corporation
    Inventors: Yakudo Tachibana, Kazuhiko Tate, Masami Ono, Nobuhiro Takei, Jun Miki, Hiroaki Taniguchi, Yoshimi Shiroto, Misunori Shimura, Yoshio Fukui