Patents by Inventor Kazuaki EZURE

Kazuaki EZURE 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).

  • Patent number: 10996575
    Abstract: A photosensitive layer included in an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound (1). The binder resin includes a polyarylate resin having at least one repeating unit (10) and at least one repeating unit (11). Alternatively, the binder resin includes a polycarbonate resin having a repeating unit (20) and a repeating unit (21).
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: May 4, 2021
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tomofumi Shimizu, Kazuaki Ezure, Hayase Yamamoto, Jun Azuma
  • Publication number: 20200356017
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer of a single layer. The photosensitive layer contains a charge generating material, a binder resin, a hole transport material, and an electron transport material. The binder resin includes a polyester resin. The polyester resin includes a first repeating unit represented by general formula (1) shown below and a second repeating unit represented by general formula (2) shown below. A content percentage of the polyester resin in the photosensitive layer is at least 0.3% by mass and no greater than 7.0% by mass.
    Type: Application
    Filed: May 4, 2020
    Publication date: November 12, 2020
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Kazuaki EZURE, Tomofumi SHIMIZU, Hayase YAMAMOTO
  • Publication number: 20200356018
    Abstract: An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer of a single layer. The photosensitive layer contains a charge generating material, a binder resin, a hole transport material, and an electron transport material. The binder resin includes a polyester resin and a polycarbonate resin. The polyester resin includes a first repeating unit represented by general formula (1) shown below and a second repeating unit represented by general formula (2) shown below. The polycarbonate resin includes a third repeating unit represented by general formula (3) shown below and a fourth repeating unit represented by general formula (24) shown below. A content percentage of the polyester resin in the photosensitive layer is at least 0.3% by mass and no greater than 7.0% by mass.
    Type: Application
    Filed: May 5, 2020
    Publication date: November 12, 2020
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Tomofumi SHIMIZU, Kazuaki EZURE, Hayase YAMAMOTO
  • Publication number: 20200233324
    Abstract: A photosensitive layer included in an electrophotographic photosensitive member contains at least a charge generating material, a hole transport material, and a binder resin. The hole transport material includes a compound (1). The binder resin includes a polyarylate resin having at least one repeating unit (10) and at least one repeating unit (11). Alternatively, the binder resin includes a polycarbonate resin having a repeating unit (20) and a repeating unit (21).
    Type: Application
    Filed: January 10, 2020
    Publication date: July 23, 2020
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Tomofumi SHIMIZU, Kazuaki EZURE, Hayase YAMAMOTO, Jun AZUMA
  • Patent number: 9213229
    Abstract: A positively chargeable electrophotographic photosensitive member has a photosensitive layer. The photosensitive layer at least includes the following layers layered in the stated order: (I) a charge transport layer at least containing a hole transport material and a binder resin; and (II) a charge generating-and-transporting layer at least containing a charge generating material, an electron transport material, a hole transport material, and a binder resin all within this layer. The binder resin contained in the charge transport layer is different from the binder resin contained in the charge generating-and-transporting layer, and either of the binder resins contains a polyvinyl acetal resin.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: December 15, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yuko Iwashita, Yukimasa Watanabe, Junichiro Otsubo, Kazuaki Ezure, Kazutaka Sugimoto
  • Publication number: 20140212803
    Abstract: A positively chargeable electrophotographic photosensitive member has a photosensitive layer. The photosensitive layer at least includes the following layers layered in the stated order: (I) a charge transport layer at least containing a hole transport material and a binder resin; and (II) a charge generating-and-transporting layer at least containing a charge generating material, an electron transport material, a hole transport material, and a binder resin all within this layer. The binder resin contained in the charge transport layer is different from the binder resin contained in the charge generating-and-transporting layer, and either of the binder resins contains a polyvinyl acetal resin.
    Type: Application
    Filed: January 30, 2014
    Publication date: July 31, 2014
    Applicant: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventors: Yuko IWASHITA, Yukimasa WATANABE, Junichiro OTSUBO, Kazuaki EZURE, Kazutaka SUGIMOTO