Patents by Inventor Minoru Tamaki

Minoru Tamaki 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).

  • Processes for preparing milled graphite fibers
    Patent number: 5824245
    Abstract: Disclosed is a process for preparing milled graphite fibers in which the amount of metallic components contained in the milled carbon fibers before graphitizing is limited to not more than 100/1,000,000 in terms of a ratio by weight. Also disclosed is a process for preparing milled graphite fibers in which the amount of metallic components contained in the milled carbon fibers before graphitizing except metallic components originally contained in the fibers themselves is limited to not more than 50/1,000,000 in terms of a ratio by weight. According to these processes, there can be obtained milled graphite fibers whose surfaces are inert, which suffer few longitudinal crackings and which are almost free from occurrence of particulate substances comprising agglomerated or bonded fibers.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: October 20, 1998
    Assignee: Petoca, Ltd.
    Inventors: Toshio Tamaki, Minoru Tamaki, Yasushi Katsuta