Patents by Inventor Yuka Imamoto

Yuka Imamoto 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).

  • Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same
    Patent number: 7732643
    Abstract: The present invention relates to a transition metal complex represented by the formula (I): wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R1)(R20)-A-, (b): —C(R1)(R20)-A1(R30)—, (c): —C(R1)=A1-, or (d): —C(R1)=A1-A2-R30; A represents a Group 16 element and A1 and A2 each represents a Group 15 element; R1 to R9, R20, and R30 are the same or different and each represents an optionally substituted hydrocarbon group, etc.; and X1 and X2 are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted C1-10 alkyl group, etc., and an intermediate product thereof, and a catalyst for olefin polymerization which comprises said transition metal complex as a component.
    Type: Grant
    Filed: November 2, 2009
    Date of Patent: June 8, 2010
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hidenori Hanaoka, Eiji Yoshikawa, Yuka Imamoto
  • Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same
    Patent number: 7671226
    Abstract: The present invention relates to a transition metal complex represented by the formula (I): wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R1)(R20)-A-, (b): —C(R1)(R20)-A1(R30)—, (c): —C(R1)=A1-, or (d): —C(R1)=A1-A2-R30; A represents a Group 16 element and A1 and A2 each represents a Group 15 element; R1 to R9, R20, and R30 are the same or different and each represents an optionally substituted hydrocarbon group, etc.; and X1 and X2 are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted C1-10 alkyl group, etc., and an intermediate product thereof, and a catalyst for olefin polymerization which comprises said transition metal complex as a component.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: March 2, 2010
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hidenori Hanaoka, Eiji Yoshikawa, Yuka Imamoto
  • TRANSITION METAL COMPLEX, CATALYST FOR OLEFIN POLYMERIZATION, AND PROCESS FOR PRODUCING OLEFIN POLYMER WITH THE SAME
    Publication number: 20100048933
    Abstract: The present invention relates to a transition metal complex represented by the formula (I): wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R1)(R20)-A-, (b): —C(R1)(R20)-A1(R30)—, (c): —C(R1)=A1-, or (d): —C(R1)=A1-A2-R30; A represents a Group 16 element and A1 and A2 each represents a Group 15 element; R1 to R9, R20, and R30 are the same or different and each represents an optionally substituted hydrocarbon group, etc.; and X1 and X2 are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted C1-10 alkyl group, etc., and an intermediate product thereof, and a catalyst for olefin polymerization which comprises said transition metal complex as a component.
    Type: Application
    Filed: November 2, 2009
    Publication date: February 25, 2010
    Inventors: Hidenori HANAOKA, Eiji Yoshikawa, Yuka Imamoto
  • Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same
    Publication number: 20090054607
    Abstract: The present invention relates to a transition metal complex represented by the formula (I): wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R1)(R20)-A-, (b): —C(R1)(R20)-A1(R30)—, (c): —C(R1)=A1-, or (d): —C(R1)=A1-A2-R30; A represents a Group 16 element and A1 and A2 each represents a Group 15 element; R1 to R9, R20, and R30 are the same or different and each represents an optionally substituted hydrocarbon group, etc.; and X1 and X2 are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted C1-10 alkyl group, etc., and an intermediate product thereof, and a catalyst for olefin polymerization which comprises said transition metal complex as a component.
    Type: Application
    Filed: September 12, 2008
    Publication date: February 26, 2009
    Inventors: Hidenori Hanaoka, Eiji Yoshikawa, Yuka Imamoto
  • Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same
    Patent number: 7439379
    Abstract: The present invention relates to a transition metal complex represented by the formula (I): wherein M represents a Group 4 transition metal; —Y— represents (a): —C(R1)(R20)-A-, (b): —C(R1)(R20)-A1(R30)-, (c): —C(R1)=A1-, or (d): —C(R1)=A1-A2-R30; A represents a Group 16 element and A1 and A2 each represents a Group 15 element; R1 to R9, R20, and R30 are the same or different and each represents an optionally substituted hydrocarbon group, etc.; and X1 and X2 are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted C1-10 alkyl group, etc., and an intermediate product thereof, and a catalyst for olefin polymerization which comprises said transition metal complex as a component.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: October 21, 2008
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Hidenori Hanaoka, Eiji Yoshikawa, Yuka Imamoto
  • Transition metal complex, catalyst for olefin polymerization, and process for producing olefin polymer with the same
    Publication number: 20040242410
    Abstract: The present invention relates to a transition metal complex represented by the formula (I): 1
    Type: Application
    Filed: March 12, 2004
    Publication date: December 2, 2004
    Inventors: Hidenori Hanaoka, Eiji Yoshikawa, Yuka Imamoto