Patents by Inventor Masakatsu Murayama

Masakatsu Murayama 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 producing end member, process for producing photo conductor drum unit, end member, and photo conductor drum unit
    Patent number: 9092004
    Abstract: There is provided a process for producing an end member capable of improving adhesiveness without not always requiring grooves or rough surfaces at a fitting portion of the end member, at the time of joining a photo conductor drum having an aluminum-made or aluminum alloy-made substrate and a crystalline resin-made end member with an adhesive. A process for producing an end member to be mounted on an end portion of a photo conductor drum and formed of a material including a crystalline resin, wherein the end member has a fitting portion to be fitted to the end portion of the photo conductor drum and the process has a step of subjecting at least an outer surface of the fitting portion to an oxidation treatment.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: July 28, 2015
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Shuichi Ikeda, Takeshi Hiramatsu, Masakatsu Murayama
  • PROCESS FOR PRODUCING END MEMBER, PROCESS FOR PRODUCING PHOTO CONDUCTOR DRUM UNIT, END MEMBER, AND PHOTO CONDUCTOR DRUM UNIT
    Publication number: 20130287441
    Abstract: There is provided a process for producing an end member capable of improving adhesiveness without not always requiring grooves or rough surfaces at a fitting portion of the end member, at the time of joining a photo conductor drum having an aluminum-made or aluminum alloy-made substrate and a crystalline resin-made end member with an adhesive. A process for producing an end member to be mounted on an end portion of a photo conductor drum and formed of a material including a crystalline resin, wherein the end member has a fitting portion to be fitted to the end portion of the photo conductor drum and the process has a step of subjecting at least an outer surface of the fitting portion to an oxidation treatment.
    Type: Application
    Filed: April 18, 2013
    Publication date: October 31, 2013
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Shuichi Ikeda, Takeshi Hiramatsu, Masakatsu Murayama
  • Electrically-conductive substrate for electrophotographic photoreceptor, electrophotographic photoreceptor comprising same and process for the preparation thereof
    Patent number: 5834148
    Abstract: The present invention prevents the deterioration of electrophotographic photoreceptor properties due to non-uniform dissolution of the surface of an aluminum substrate or production of hydrates during rinsing or drying from hot pure water in an aqueous cleaning process, assuring the uniformity and stability on the surface of an electrically-conductive substrate for electrophotographic photoreceptor. The resulting electrically-conductive substrate for electrophotographic photoreceptor exhibits an excellent corrosion resistance that can be expected to provide a high environmental stability. Further, the resulting electrophotographic photoreceptor can exhibit improved electrical properties.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: November 10, 1998
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masakatsu Murayama, Susumu Taguchi, Toshiyuki Araki