Patents by Inventor Masami Tsurumori

Masami Tsurumori 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).

  • Electrostatic image developing toner
    Patent number: 9740119
    Abstract: The invention is to provide a positively charging electrostatic image developing toner capable of providing a high quality and high gloss and excellent in stability in long term use and environmental stability, and especially not causing fog in the use at high temperature and high humidity condition. The present invention relates to an electrostatic image developing toner comprising toner mother particles containing a binder resin and a colorant, wherein the binder resin contains a repeating unit having 4 to 20 ether bonds, containing a carbon atom, a hydrogen atom and an oxygen atom, and accounting for a specific amount.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: August 22, 2017
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Usei Jo, Tetsuharu Yuge, Maki Saito, Masami Tsurumori
  • ELECTROSTATIC IMAGE DEVELOPING TONER
    Publication number: 20160139519
    Abstract: The invention is to provide a positively charging electrostatic image developing toner capable of providing a high quality and high gloss and excellent in stability in long term use and environmental stability, and especially not causing fog in the use at high temperature and high humidity condition. The present invention relates to an electrostatic image developing toner comprising toner mother particles containing a binder resin and a colorant, wherein the binder resin contains a repeating unit having 4 to 20 ether bonds, containing a carbon atom, a hydrogen atom and an oxygen atom, and accounting for a specific amount.
    Type: Application
    Filed: January 21, 2016
    Publication date: May 19, 2016
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Usei Jo, Tetsuharu Yuge, Maki Saito, Masami Tsurumori
  • ELECTROSTATIC IMAGE DEVELOPING TONER
    Publication number: 20140141367
    Abstract: The invention is to provide a positively charging electrostatic image developing toner capable of providing a high quality and high gloss and excellent in stability in long term use and environmental stability, and especially not causing fog in the use at high temperature and high humidity condition. The present invention relates to an electrostatic image developing toner comprising toner mother particles containing a binder resin and a colorant, wherein the binder resin contains a repeating unit having 4 to 20 ether bonds, containing a carbon atom, a hydrogen atom and an oxygen atom, and accounting for a specific amount.
    Type: Application
    Filed: January 28, 2014
    Publication date: May 22, 2014
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Usei JO, Tetsuharu YUGE, Maki SAITO, Masami TSURUMORI
  • Electrophotographic photoreceptor, and image forming device and electrophotographic photoreceptor cartridge using the same member cartridge
    Patent number: 8273509
    Abstract: To realize an electrophotographic photoreceptor excellent in abrasion resistance, the photosensitive layer of the photoreceptor comprises a polyester resin containing a repeating structural unit represented by the formula (1) and a hydrazone compound. (In the formula (1), Ar1 to Ar4 each represents, independently of each other, an arylene group which may have a substituent. X1 represents a bivalent group (including a single bond) and X2 represents a bivalent group (including a single bond) with 3 or less atoms.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: September 25, 2012
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yuka Nagao, Tadashi Mizushima, Masami Tsurumori, Tomoko Nakagawa, Hiroaki Takamura, Shunichirou Kurihara, Tooru Uenaka, Masayuki Hiroi
  • ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, IMAGE FORMING DEVICE USING SAME, AND ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER CARTRIDGE
    Publication number: 20090232551
    Abstract: To realize an electrophotographic photoreceptor excellent in abrasion resistance, the photosensitive layer of the photoreceptor comprises a polyester resin containing a repeating structural unit represented by the formula (1) and a hydrazone compound. (In the formula (1), Ar1 to Ar4 each represents, independently of each other, an arylene group which may have a substituent. X1 represents a bivalent group (including a single bond) and X2 represents a bivalent group (including a single bond) with 3 or less atoms.
    Type: Application
    Filed: January 9, 2007
    Publication date: September 17, 2009
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Yuka Nagao, Tadashi Mizushima, Masami Tsurumori, Tomoko Nakagawa, Hiroaki Takamura, Shunichirou Kurihara, Tooru Uenaka, Masayuki Hiroi
  • Electrostatic image-developing toner and developer
    Patent number: 5320924
    Abstract: Disclosed herein are an electrostatic image-developing toner comprising a binder resin, a quaternary ammonium salt and an acidic carbon black as colorant, and an electrostatic image developer containing the same.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: June 14, 1994
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Takashi Shintaku, Kazuhiro Hirama, Masami Tsurumori