Patents by Inventor Klaus Jonas

Klaus Jonas 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).

  • Catalysts containing organochromium compounds and their use for polymerizing alkenes
    Patent number: 6255418
    Abstract: Novel donor ligand substituted &eegr;5-organyl chromium complexes which, in admixture with Lewis acids, such as methylaluminoxane, form highly active polymerization catalysts for &agr;-alkenes and mixtures thereof and for mixtures of &agr;-alkenes and unsaturated alkenes with a strained double bond.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: July 3, 2001
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Peter W. Jolly, Klaus Jonas, Glenn P. J. Verhovnik, Arno Döhring, Jan Göhre, Jan Christoph Weber
  • Mononuclear and polynuclear transition metal complexes with pentalene ligands bound to single metal atoms
    Patent number: 5959132
    Abstract: The invention relates to a complex compound having at least one transition metal atom, characterized in that said complex compound contains at least one pentalene or substituted pentalene ligand which is coordinated to only one single metal atom.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: September 28, 1999
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Klaus Jonas, Peter Kolb, Guido Kollbach
  • Method of preparing transition metal-olefin complex compounds and alkali metal-transition metal-olefin complex compounds
    Patent number: 4169845
    Abstract: The invention relates to the reaction of cyclopentadienyl-transition metal compounds, (C.sub.5 H.sub.5).sub.2 M or C.sub.5 H.sub.5 --M(L).sub.n (M=transition metal, L=olefin), with alkali metal in the presence of olefins, with detachment of the C.sub.5 H.sub.5 rings from the transition metal atom to form alkali metal cyclopentadienide, leads, to transition metal-olefin complex compounds free of alkali metal or also containing alkali metal, in yields of greater than 65%, the latter compounds being able to contain one or even several alkali metal atoms per transition metal atom.It is moreover possible, depending on the selection of the stoichiometry or of the reaction compounds, and depending on the nature of the transition metal, to detach only one or also both cyclopentadienyl rings from the transition metal atom, so that by this method the most various transition metal-olefin complex compounds can be prepared, namely transition metal-olefin complex compounds containing C.sub.5 H.sub.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: October 2, 1979
    Assignee: Studiengessellschaft Kohle mbH
    Inventor: Klaus Jonas