Patents by Inventor Fengjun Hua

Fengjun Hua 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).

  • Process of making modified metallocene catalyst, catalyst produced and use thereof
    Patent number: 9045569
    Abstract: Olefin polymerization catalysts or catalyst systems comprising a mixture, contact product, reaction product or complex comprising as elements or components: (A) at least one metallocene pre-catalyst compound or polymerization active metallocene compound; (B) at least one titanium containing metallocene compound; and when (A) is a metallocene pre-catalyst compound, (C) at least one activator; provided however: (I) the titanium-containing metallocene compound is inactive or substantially inactive for the polymerization of olefins prior to or concurrently with the use of the catalyst system for olefin polymerization.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: June 2, 2015
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Michael D. Jensen, Michael J. Elder, Andrew G. Singleton, Stephen R. Schmidt, Patrick J. Kerwin, John H. Hain, Jr., Fengjun Hua
  • PROCESS OF MAKING MODIFIED METALLOCENE CATALYST, CATALYST PRODUCED AND USE THEREOF
    Publication number: 20130289227
    Abstract: Olefin polymerization catalysts or catalyst systems comprising a mixture, contact product, reaction product or complex comprising as elements or components: (A) at least one metallocene pre-catalyst compound or polymerization active metallocene compound; (B) at least one titanium containing metallocene compound; and when (A) is a metallocene pre-catalyst compound, (C) at least one activator; provided however: (I) the titanium-containing metallocene compound is inactive or substantially inactive for the polymerization of olefins prior to or concurrently with the use of the catalyst system for olefin polymerization.
    Type: Application
    Filed: January 12, 2012
    Publication date: October 31, 2013
    Applicant: W.R. GRACE & CO.-CONN
    Inventors: Michael D. Jensen, Michael J. Elder, Andrew G. Singleton, Stephen R. Schmidt, Patrick J. Kerwin, John H. Hain, JR., Fengjun Hua
  • Production of photoluminescent silicon nanoparticles having surfaces that are essentially free of residual oxygen
    Patent number: 8029698
    Abstract: The present invention relates to a method for preparing photoluminescent silicon nanoparticles having uniformly hydrogen-terminated surfaces that are essentially free of residual oxygen. The present invention also relates to a method of preparing a blue-emitting photoluminescent silicon nanoparticle. The present invention further relates to a composition that includes a photoluminescent silicon nanoparticle having a surface that is uniformly hydrogen-terminated and essentially free of residual oxygen. The present invention also relates to a composition including a photoluminescent silicon nanoparticle having a surface that is uniformly coated with an organic layer and essentially free of residual oxygen. The present invention additionally relates to a composition including a photoluminescent silicon nanoparticle stably dispersed in an organic solvent and having a surface that is uniformly coated with an organic layer and essentially free of residual oxygen.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: October 4, 2011
    Assignee: The Research Foundation of State University of New York
    Inventors: Eli Ruckenstein, Mark T. Swihart, Fengjun Hua
  • Production of photoluminescent silicon nanoparticles having surfaces that are essentially free of residual oxygen
    Publication number: 20070196297
    Abstract: The present invention relates to a method for preparing photoluminescent silicon nanoparticles having uniformly hydrogen-terminated surfaces that are essentially free of residual oxygen. The present invention also relates to a method of preparing a blue-emitting photoluminescent silicon nanoparticle. The present invention further relates to a composition that includes a photoluminescent silicon nanoparticle having a surface that is uniformly hydrogen-terminated and essentially free of residual oxygen. The present invention also relates to a composition including a photoluminescent silicon nanoparticle having a surface that is uniformly coated with an organic layer and essentially free of residual oxygen. The present invention additionally relates to a composition including a photoluminescent silicon nanoparticle stably dispersed in an organic solvent and having a surface that is uniformly coated with an organic layer and essentially free of residual oxygen.
    Type: Application
    Filed: April 19, 2006
    Publication date: August 23, 2007
    Applicant: The Research Foundation of State University of New York
    Inventors: Eli Ruckenstein, Mark Swihart, Fengjun Hua