Patents by Inventor Hiroaki Yamazaki

Hiroaki Yamazaki 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 production of o-(2,6-dichloroanilino)-phenylacetic acid
    Patent number: 4410724
    Abstract: There is provided a process for production of o-(2,6-dichloroanilino)phenylacetic acid or a salt thereof by reacting o-chlorophenylacetic acid or an alkali metal salt thereof with 2,6-dichloroaniline in the presence of a base and at least 0.5 mol of a copper catalyst per mol of o-chlorophenylacetic acid in a polar solvent.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: October 18, 1983
    Assignee: Zenyaku Kogyo Kabushiki Kaisha
    Inventors: Muneaki Takase, Tadahiro Nakamura, Kazuo Kamiya, Toshiyuki Takezawa, Hiroaki Yamazaki, Takashi Iwaki
  • Method for the manufacture of a battery separator using tubing
    Patent number: 4356046
    Abstract: To manufacture a tubular battery separator with a closed end, a tubular body is formed from a sheet of a separator material with a preponderant content of stretched thermoplastic fibers; the overlapping edges which occur welded together; a disc fitted to the inside diameter inserted from one end into the tubular body to a position near the other end leaving an overhanging edge; the overhanging edge softened by heating, causing it to shrink; and the softened and shrunk edge pressed against the disc so as to join the disc to the tubular body.
    Type: Grant
    Filed: September 17, 1980
    Date of Patent: October 26, 1982
    Assignee: Firma Carl Freudenberg
    Inventors: Hiroaki Yamazaki, Takao Hasegawa