Patents by Inventor Marina Surakka

Marina Surakka 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).

  • Polymerization process
    Patent number: 7666957
    Abstract: A process for the polymerisation of ethylene and optionally at least one C3-20 alpha olefin comonomer in the slurry or solution phase in a reactor having a polymer outlet stream, a procatalyst or catalyst feed stream and a hydrogen feed stream, said polymerisation being effected in the presence of a metallocene catalyst, a diluent and hydrogen, wherein said diluent is recycled from said outlet stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said procatalyst or catalyst feed stream does not comprise recycled diluent.
    Type: Grant
    Filed: December 27, 2004
    Date of Patent: February 23, 2010
    Assignee: Borealis Technology Oy
    Inventors: Kalle Kallio, Janne Maaranen, Eija Lappi, Marina Surakka
  • Polymerization Process
    Publication number: 20080269435
    Abstract: A process for the polymerisation of ethylene and optionally at least one C3-20 alpha olefin comonomer in the slurry or solution phase in a reactor having a polymer outlet stream, a procatalyst or catalyst feed stream and a hydrogen feed stream, said polymerisation being effected in the presence of a metallocene catalyst, a diluent and hydrogen, wherein said diluent is recycled from said outlet stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said procatalyst or catalyst feed stream does not comprise recycled diluent.
    Type: Application
    Filed: December 27, 2004
    Publication date: October 30, 2008
    Inventors: Kalle Kallio, Janne Maaranen, Eija Lappi, Marina Surakka