Patents by Inventor Yasutaka Akahashi

Yasutaka Akahashi 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).

  • Developer carrying member, method for its production, and developing assembly
    Patent number: 8538303
    Abstract: A developer carrying member having less environmental dependence is provided. The developer carrying member has a substrate and a resin layer, which resin layer contains an acrylic resin; the acrylic resin having a unit (1) represented by the following formula (1) and a unit (2) represented by the following formula (2). In the formula (1), R1 represents a hydrogen atom or a methyl group, R2 represents an alkylene group having 1 to 4 carbon atoms, and an asterisk * represents the part of linkage to the part shown by a double asterisk ** in the formula (2). In the formula (2), R3 represents a hydrogen atom or a methyl group; R4 represents an alkylene group having 1 to 4 carbon atom(s); R5, R6 and R7 each represent an alkyl group having 1 to 18 carbon atoms; A? represents an anion.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: September 17, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuma Matsuda, Masayoshi Shimamura, Yasutaka Akahashi, Satoshi Otake, Minoru Ito, Kazuhito Wakabayashi, Atsushi Noguchi, Hironori Mori