Patents by Inventor Kenji KIHIRA

Kenji KIHIRA 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).

  • Electrophotographic toner using bioplastic and production method thereof
    Patent number: 9785072
    Abstract: An electrophotographic toner which is excellent in grindability, fixing property and durability by being obtained via a step of melt-kneading a mixture containing an amorphous bioplastic having a weight-average molecular weight (Mw) of 55000 to 120000, a terpene phenol resin, and a styrene acrylic resin having a weight-average molecular weight (Mw) of 85500 to 118000 so as to obtain a kneaded mixture, and a step of grinding the kneaded mixture after hardening.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: October 10, 2017
    Assignee: CASIO COMPUTER CO., LTD.
    Inventors: Kenji Kihira, Hideki Ikeda, Yuichiro Iegaki, Yuta Kan, Hideki Hasegawa
  • Electrophotographic toner using bioplastic and method of producing the same
    Patent number: 9448499
    Abstract: An electrophotographic toner having good grindability, and excellent fixability and durability, and a method of producing the same are provided. The electrophotographic toner includes an amorphous bioplastic having a weight average molecular weight (Mw) of 30,000 to 100,000, and at least one of a phenol resin and a terpene phenol resin as a grinding aid.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: September 20, 2016
    Assignee: CASIO COMPUTER CO., LTD.
    Inventors: Kenji Kihira, Hideki Ikeda, Yuichiro Iegaki, Yuta Kan
  • ELECTROPHOTOGRAPHIC TONER USING BIOPLASTIC AND PRODUCTION METHOD THEREOF
    Publication number: 20150362851
    Abstract: An electrophotographic toner which is excellent in grindability, fixing property and durability by being obtained via a step of melt-kneading a mixture containing an amorphous bioplastic having a weight-average molecular weight (Mw) of 55000 to 120000, a terpene phenol resin, and a styrene acrylic resin having a weight-average molecular weight (Mw) of 85500 to 118000 so as to obtain a kneaded mixture, and a step of grinding the kneaded mixture after hardening.
    Type: Application
    Filed: March 20, 2015
    Publication date: December 17, 2015
    Applicant: CASIO COMPUTER CO., LTD.
    Inventors: Kenji KIHIRA, Hideki IKEDA, Yuichiro IEGAKI, Yuta KAN, Hideki HASEGAWA
  • ELECTROPHOTOGRAPHIC TONER USING BIOPLASTIC AND METHOD OF PRODUCING THE SAME
    Publication number: 20150268575
    Abstract: An electrophotographic toner having good grindability, a wide fixing temperature range and excellent durability, and a method of producing the same are provided. The electrophotographic toner includes, as a binder resin, an amorphous bioplastic having a number average molecular weight (Mn) of 5,000 to 40,000, a weight average molecular weight (Mw) of 20,000 to 60,000, and a ratio of Mw/Mn of 1.4 or more.
    Type: Application
    Filed: March 17, 2015
    Publication date: September 24, 2015
    Applicant: CASIO COMPUTER CO., LTD.
    Inventors: Yuta KAN, Hideki IKEDA, Yuichiro IEGAKI, Kenji KIHIRA
  • ELECTROPHOTOGRAPHIC TONER USING BIOPLASTIC AND METHOD OF PRODUCING THE SAME
    Publication number: 20150261109
    Abstract: An electrophotographic toner having good grindability, and excellent fixability and durability, and a method of producing the same are provided. The electrophotographic toner includes an amorphous bioplastic having a weight average molecular weight (Mw) of 30,000 to 100,000, and at least one of a phenol resin and a terpene phenol resin as a grinding aid.
    Type: Application
    Filed: February 2, 2015
    Publication date: September 17, 2015
    Applicant: CASIO COMPUTER CO., LTD.
    Inventors: Kenji KIHIRA, Hideki IKEDA, Yuichiro IEGAKI, Yuta KAN