Patents by Inventor Michihiro Ikeda

Michihiro Ikeda 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).

  • Carbon black aggregate
    Patent number: 6019829
    Abstract: A carbon black aggregate having a surface hardness of at least 70 g and having a covering.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: February 1, 2000
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoshihiro Omae, Syushichi Yoshimura, Michihiro Ikeda, Tadashi Hashiguchi, Akiyoshi Ohnishi, Shuuhei Taohata
  • Dental filling composition
    Patent number: 5350782
    Abstract: A dental filling composition comprising a polymerizable monomer and an inorganic filler, characterized in that the inorganic filler comprises (A) 20 to 80% by weight of spherical inorganic oxide particles with an average particle size of from 1.0 to 5.0 .mu.m, and (B) 80 to 20% by weight of spherical inorganic oxide particles which have a particle size range of at least 0.05 .mu.m and less than 1.0 .mu.m and at least 5% by weight of which is in a particle size range of from 0.05 to 0.2 .mu.m. The dental filling composition may have a high content of the inorganic filler and, upon curing, has good mechanical strength, good surface glass and smoothness, low water absorption, and transparency compared to that of natural teeth, in which smaller particles are sufficiently packed in interstices among larger particles, and smaller particles serve also for the good transparency.
    Type: Grant
    Filed: September 4, 1992
    Date of Patent: September 27, 1994
    Assignees: Kanebo, Ltd., Mitsubishi Kasei Corporation
    Inventors: Hiroyuki Sasaki, Tetsuro Ota, Eiji Hattori, Michihiro Ikeda
  • Process for producing a ceramic preform
    Patent number: 5114881
    Abstract: A process for producing a ceramic preform, which comprises mixing an alkoxysilane and fine silica powder, molding the mixture, followed by heating for de-alcoholysis.
    Type: Grant
    Filed: April 15, 1991
    Date of Patent: May 19, 1992
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Tsugio Kaneko, Tsuneo Kimura, Michihiro Ikeda, Akira Utsunomiya, Yuka Ohno