Patents by Inventor Chifei Wu

Chifei Wu 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).

  • CARBON BLACK
    Publication number: 20110177338
    Abstract: Carbon black of the present invention has a number average particle size of Feret's diameter of 5 to 300 nm and contains primary particles of 5% or more on a number basis.
    Type: Application
    Filed: June 2, 2005
    Publication date: July 21, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Masafumi Uchida, Shingo Asai, Chifei Wu
  • Nanophase carbon black grafted with organic compound in situ
    Patent number: 7951310
    Abstract: The present invention discloses a nanophase carbon black grafted with organic compounds, comprising (a) a first component: 100 parts by weight of original carbon black particles, and (b) a second component: 5-300 parts by weight of grafting organic compounds having or producing free radicals which is grafted onto the surface of the carbon black, wherein the molecular weight of the grafting organic compounds is 100-10000, and the nanophase carbon black has a particle size of 1-100 nm. The invention also discloses the synthesis thereof and articles therefrom.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: May 31, 2011
    Assignee: East China University of Science and Technology
    Inventors: Chifei Wu, Xuanquan Zhou, Weihong Guo, Xiliang Zhang, Guozhang Wu, Haiyan Xu, Xianhui Li, Jianfeng Huang, Na Yu, Shengying Qian, Jing Chen, Liang Fang, Fei Shen, Li Lang, Qiuying Zhang, Jingjie Han
  • METHOD FOR PRODUCING CARBON BLACK
    Publication number: 20100119437
    Abstract: Carbon black, comprising particles having a number average particle size of Feret's diameter of 2 to 100 nm and an average roundness of 100 to 130.
    Type: Application
    Filed: January 21, 2010
    Publication date: May 13, 2010
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Masafumi Uchida, Shingo Asai, Chifei Wu
  • CARBON BLACK
    Publication number: 20090226722
    Abstract: Carbon black, comprising particles having a number average particle size of Feret's diameter of 2 to 100 nm and an average roundness of 100 to 130.
    Type: Application
    Filed: June 2, 2005
    Publication date: September 10, 2009
    Inventors: Masafumi Uhida, Shingo Asai, Chifei Wu
  • CARBON BLACK
    Publication number: 20090214865
    Abstract: Carbon black of the present invention has a number average particle size of Feret's diameter of 5 to 300 nm and a CV value of the number average particle size of Feret's diameter of 5 to 30.
    Type: Application
    Filed: June 2, 2005
    Publication date: August 27, 2009
    Applicant: KONICA MINOLTA BUSHINESS TECHNOLOGIES INC.
    Inventors: Masafumi Uchida, Shingo Asai, Chifei Wu
  • Nanophase carbon black grafted with organic compound in situ, synthesis thereof and articles therefrom
    Publication number: 20070235692
    Abstract: The present invention discloses a nanophase carbon black grafted with organic compounds, comprising (a) a first component: 100 parts by weight of original carbon black particles, and (b) a second component: 5-300 parts by weight of grafting organic compounds having or producing free radicals which is grafted onto the surface of the carbon black, wherein the molecular weight of the grafting organic compounds is 100-10000, and the nanophase carbon black has a particle size of 1-100 nm. The invention also discloses the synthesis thereof and articles therefrom.
    Type: Application
    Filed: March 28, 2006
    Publication date: October 11, 2007
    Inventors: Chifei Wu, Xuanquan Zhou, Weihong Guo, Xiliang Zhang, Guozhang Wu, Haiyan Xu, Xianhui Li, Jianfeng Huang, Na Yu, Shengying Qian, Jing Chen, Liang Fang, Fei Shen, Liang Zhang, Qiuying Li, Jingjie Han