Patents by Inventor Yuhki Ohtsuka

Yuhki Ohtsuka 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).

  • Bis-terpyridine monomer
    Patent number: 8378062
    Abstract: A bis-terpyridine monomer includes a first terpyridyl substituent (A), a second terpyridyl substituent (B), and a spacer that contains at least one benzene ring and links the first terpyridyl substituent (A) and the second terpyridyl substituent (B). The bis-terpyridine monomer is represented by the following formula (10): where X1 is a halogen; and R1, R2, R3 and R4 are each independently a halogen atom, an aryl group or an alkyl group.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: February 19, 2013
    Assignee: National Institute for Materials Science
    Inventors: Masayoshi Higuchi, Yuhki Ohtsuka, Akari Hayashi, Dirk G. Kurth
  • Bis-terpyridine monomer
    Publication number: 20110213154
    Abstract: A bis-terpyridine monomer includes a first terpyridyl substituent (A), a second terpyridyl substituent (B), and a spacer that contains at least one benzene ring and links the first terpyridyl substituent (A) and the second terpyridyl substituent (B). The bis-terpyridine monomer is represented by the following formula (10): where X1 is a halogen; and R1, R2, R3 and R4 are each independently a halogen atom, an aryl group or an alkyl group.
    Type: Application
    Filed: February 18, 2011
    Publication date: September 1, 2011
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Masayoshi Higuchi, Yuhki Ohtsuka, Akari Hayashi, Dirk G. Kurth
  • Electrochromic polymer material
    Patent number: 7923530
    Abstract: Provided are (1) a terpyridine monomer that has a strong ability to coordinate with metal atoms, and (2) a polymer material that can be readily switched between a colored state and a colorless state by controlling the electrical potential applied to it and that can be processed. A bis-terpyridine monomer of a first invention comprises a first terpyridyl substituent (A), a second terpyridyl substituent (B), and a spacer that contains at least one benzene ring and links the substituents (A) and (B). A polymer material of a second invention comprises a bis-terpyridine derivative derived from the monomer according to the first invention, a metal ion and a counter anion, or comprise first to Nth bis-terpyridine derivatives (N is an integer of 2 or greater), first to Nth metal ions (N is an integer of 2 or greater) and first to Nth counter anions (N is an integer of 2 or greater).
    Type: Grant
    Filed: May 9, 2006
    Date of Patent: April 12, 2011
    Assignee: National Institute for Materials Science
    Inventors: Masayoshi Higuchi, Yuhki Ohtsuka, Akari Hayashi, Dirk G. Kurth
  • Bis-Terpyridine Monomer, Production Process Thereof, Polymer Material Derived from the Monomer, and Electrochromic Device
    Publication number: 20090270589
    Abstract: Provided are (1) a terpyridine monomer that has a strong ability to coordinate with metal atoms, and (2) a polymer material that can be readily switched between a colored state and a colorless state by controlling the electrical potential applied to it and that can be processed. A bis-terpyridine monomer of a first invention comprises a first terpyridyl substituent (A), a second terpyridyl substituent (B), and a spacer that contains at least one benzene ring and links the substituents (A) and (B). A polymer material of a second invention comprises a bis-terpyridine derivative derived from the monomer according to the first invention, a metal ion and a counter anion, or comprise first to Nth bis-terpyridine derivatives (N is an integer of 2 or greater), first to Nth metal ions (N is an integer of 2 or greater) and first to Nth counter anions (N is an integer of 2 or greater).
    Type: Application
    Filed: May 9, 2006
    Publication date: October 29, 2009
    Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE
    Inventors: Masayoshi Higuchi, Yuhki Ohtsuka, Akari Hayashi, Dirk G. Kurth