Patents by Inventor Edwin G. Ijpeij

Edwin G. Ijpeij 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).

  • Indenyl compounds for the polymerization of olefins
    Patent number: 6342622
    Abstract: Indenyl compound of formula (1) wherein: M is a transition metal from the lanthanides or from group 3, 4, 5 or 6 of the Periodic System of Elements, Q is an anionic ligand to M, k is the number of Q groups, R is a bridging group and Z and X are substituents, wherein R contains at least one sp2-hybridized carbon atom that is bonded to the indenyl group at the 2-position with the exclusion of Ti(deshydronorbiphenacene) dichloride.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: January 29, 2002
    Assignee: DSM B.V.
    Inventors: Henricus J. Arts, Mirko Kranenburg, Ramon H. A. M. Meijers, Edwin G. Ijpeij, Gerardus J. M. Gruter, Felix H. Beijer
  • Cyclopentadiene compound substituted with branched alkyl groups
    Patent number: 6124488
    Abstract: Polysubstituted cyclopentadiene compound, in which at least one substituent is of the form -RDR'.sub.n, in which R is a bonding group, D is a hetero atom selected from group 15 or 16 of the Periodic System of the Elements, R' is a substituent and n is the number of R' groups bonded to D, and in that at least one further substituent is a branched alkyl group.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: September 26, 2000
    Assignee: DSM N.V.
    Inventors: Gerardus J. M. Gruter, Johannes A. M. van Beek, Richard Green, Edwin G. IJpeij
  • Cyclopentadiene compound substituted with linear groups
    Patent number: 6117811
    Abstract: Polysubstituted cyclopentadiene compound, wherein at least one substituent is of the form --RDR'.sub.n, where R is a bonding group between the cyclopentadiene and the DR'.sub.n group, D is a hetero atom chosen from group 15 or 16 of the Periodic Table of the Elements, R' is a substituent and n is the number of R' groups bonded to D, and in which at least one further substituent is a linear alkyl group comprising at least 2 carbon atoms.
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: September 12, 2000
    Assignee: DSM N.V.
    Inventors: Gerardus J. M. Gruter, Johannes A. M. van Beek, Richard Green, Edwin G. Ijpeij