Patents by Inventor Barbara Christine Hall

Barbara Christine Hall 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).

  • Mixed phosphinimine catalyst
    Patent number: 6486273
    Abstract: A supported catalyst for the polymerization of olefins, especially ethylene, has at least two catalyst components having different propagation and/or termination constants. Each catalyst component must have at least one phosphinimine ligand. The polymer produced according to this invention has a broad molecular weight distribution. Catalysts according to this invention have a very surprising and desirable hydrogen response.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: November 26, 2002
    Assignee: Nova Chemicals (International) S.A
    Inventors: Ian McKay, Alison Ciupa, Barbara Christine Hall
  • Mixed phosphinimine catalyst
    Patent number: 6235672
    Abstract: A supported catalyst for the polymerization of olefins, especially ethylene, has at least two catalyst components having different propagation and/or termination constants. Each catalyst component must have at least one phosphinimine ligand. The polymer produced according to this invention has a broad molecular weight distribution. Catalysts according to this invention have a very surprising and desirable hydrogen response.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: May 22, 2001
    Assignee: Nova Chemicals (International) S.A.
    Inventors: Ian McKay, Alison Ciupa, Barbara Christine Hall