Patents by Inventor Kiyoshi Sekihara

Kiyoshi Sekihara 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).

  • Photosensitive member for electrophotography with copolyamide interlayer
    Patent number: 5173385
    Abstract: In the field of the photosensitive member for electrophotography comprising an electrically conductive substrate and at least one primer layer and a photosensitive layer, there is disclosed an improved member which is characterized in that the primer layer contains a copolyamide which contains as a constituent a diamine represented by a chemical formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 respectively and independently a hydrogen atom or a methyl or ethyl group.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: December 22, 1992
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Mamoru Nozomi, Kiyoshi Sekihara, Ryoko Aso
  • Magnetic toner for electrophotography
    Patent number: 4960668
    Abstract: An insulative magnetic toner disclosed herein comprises a magnetic powder, a negative charge control agent, a binder resin and a compound having phenazine ring amorphous-silicon photoreceptor.The magnetic toner according to the invention is effective for preventing the occurrence of picture image blurring under high humidity when used in an amorphous-silicon photoreceptor.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: October 2, 1990
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Toshihiko Yoshitomi, Heihachi Yushina, Hiromi Horiuchi, Yukio Yamaguchi, Yasuo Kamoshita, Kiyoshi Sekihara
  • Amorphous silicon hydride photoreceptors for electrophotography, process for the preparation thereof, and method of use
    Patent number: 4764448
    Abstract: An amorphous silicon photoreceptor for electrophotography having a specific surface roughness is disclosed herein. Also provided are a process for the preparation and/or regeneration of the material and improved methods for electrophotography, which use a special abrasive. The material enables the electrophotography without occurance of any image blurring under high humidity conditions.
    Type: Grant
    Filed: April 2, 1986
    Date of Patent: August 16, 1988
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Toshihiko Yoshitomi, Hiromi Horiuchi, Yukio Yamaguchi, Yasuo Kamoshita, Kiyoshi Sekihara
  • Process for the recovery of nosiheptide
    Patent number: 4584134
    Abstract: Nosiheptide, a valuable antibiotic used as an animal feed additive, is separated from a culture containing the same by extraction with a cyclic ether, preferably tetrahydrofuran.
    Type: Grant
    Filed: June 29, 1984
    Date of Patent: April 22, 1986
    Assignee: Rhone-Poulenc Sante
    Inventors: Satoshi Morioka, Makoto Shida, Nobuyuki Suzuki, Kiyoshi Sekihara