Patents by Inventor Seiichi FURUKAWA

Seiichi FURUKAWA 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).

  • Organic material and photoelectric conversion element
    Patent number: 11950503
    Abstract: An organic material represented by General Formula (1): where, in General Formula (1), R1 is an alkyl group having 6 carbon atoms or more but 20 carbon atoms or less; n is an integer of from 1 through 3; X1 to X4 are each a hydrogen atom or a fluorine atom; and Z is a compound represented by General Formula (2), (3), or (4) below: where, in General Formulae (2) to (4), R2, R3, and R4 are each an alkyl group having 6 carbon atoms or more but 20 carbon atoms or less; and Y is an oxygen atom or a sulfur atom.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: April 2, 2024
    Assignees: Ricoh Company, Ltd., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Ryota Arai, Takuma Yasuda, Seiichi Furukawa, Narumi Sato
  • ORGANIC MATERIAL AND PHOTOELECTRIC CONVERSION ELEMENT
    Publication number: 20210043846
    Abstract: An organic material represented by General Formula (1): where, in General Formula (1), R1 is an alkyl group having 6 carbon atoms or more but 20 carbon atoms or less; n is an integer of from 1 through 3; X1 to X4 are each a hydrogen atom or a fluorine atom; and Z is a compound represented by General Formula (2), (3), or (4) below: where, in General Formulae (2) to (4), R2, R3, and R4 are each an alkyl group having 6 carbon atoms or more but 20 carbon atoms or less; and Y is an oxygen atom or a sulfur atom.
    Type: Application
    Filed: February 20, 2019
    Publication date: February 11, 2021
    Inventors: Ryota ARAI, Takuma YASUDA, Seiichi FURUKAWA, Narumi SATO
  • Organic material and photoelectric conversion element
    Patent number: 10062854
    Abstract: To provide an organic material represented by General Formula (1) below: where, in General Formula (1), R1 and R2 are each independently an alkyl group having from 2 through 8 carbon atoms, R3 and R4 are each independently a straight-chain alkyl group having 1, 2, 4, 6, or 12 carbon atoms, or a hydrogen atom, and n is an integer of 1 or 2.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: August 28, 2018
    Assignees: RICOH COMPANY, LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Ryota Arai, Takuma Yasuda, Woong Shin, Hideaki Komiyama, Yu Hidaka, Takahiro To, Seiichi Furukawa
  • ORGANIC MATERIAL AND PHOTOELECTRIC CONVERSION ELEMENT
    Publication number: 20170338424
    Abstract: To provide an organic material represented by General Formula (1) below: where, in General Formula (1), R1 and R2 are each independently an alkyl group having from 2 through 8 carbon atoms, R3 and R4 are each independently a straight-chain alkyl group having 1, 2, 4, 6, or 12 carbon atoms, or a hydrogen atom, and n is an integer of 1 or 2.
    Type: Application
    Filed: May 16, 2017
    Publication date: November 23, 2017
    Applicants: RICOH COMPANY, LTD., KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Ryota ARAI, Takuma YASUDA, Woong SHIN, Hideaki KOMIYAMA, Yu HIDAKA, Takahiro TO, Seiichi FURUKAWA