Patents by Inventor Alexandre Segul

Alexandre Segul 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).

  • Catalyst systems of the Ziegler-Natta type
    Patent number: 6524995
    Abstract: Catalyst systems of the Ziegler-Natta type comprise as active constituents a) a solid component comprising a compound of titanium or vanadium, a compound of magnesium, a particulate inorganic oxide as support and an internal electron donor compound, and as cocatalyst b) an aluminum compound and c) if desired, a further, external electron donor compound, wherein the particulate, inorganic oxide used has a specific surface area of from 350 to 1000 m2/g and a mean particle diameter {overscore (D)} in the range from 5 to 60 &mgr;m and comprises particles which are composed of primary particles having a mean particle diameter {overscore (d)} in the range from 1 to 10 &mgr;m and contain voids or channels between the primary particles, where the macroscopic proportion of voids or channels having a diameter of greater than 1 &mgr;m in the particles of the inorganic oxides is in the range from 5 to 30% by volume and the molar ratio of the compound of magnesium to the particulate, inorganic oxide is from 0.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: February 25, 2003
    Assignee: Basell Polypropylene GmbH
    Inventors: Wolf Spaether, Stephan Hüffer, John Lynch, Wolfgang Bidell, Joachim Rösch, Günther Schweier, Roland Hingmann, Alexandre Segul, Rainer Hemmerich, Ingo Treffkorn
  • Novel catalyst systems of the Ziegler-Natta type
    Publication number: 20010020073
    Abstract: Catalyst systems of the Ziegler-Natta type comprise as active constituents
    Type: Application
    Filed: January 2, 2001
    Publication date: September 6, 2001
    Inventors: Wolf Spaether, Stephan Huffer, John Lynch, Wolfgang Bidell, Joachim Rosch, Gunther Schweier, Roland Hingmann, Alexandre Segul, Rainer Hemmerich, Ingo Treffkorn