Patents by Inventor Sjoerd Harder

Sjoerd Harder 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).

  • Heteroleptic alkaline-earth metal compounds and methods for carrying out stereoselective anionic polymerization
    Patent number: 6399727
    Abstract: Polymerization initiator comprising an alkaline earth metal compound chosen from the group a) of heteroleptic alkaline earth metal compounds of the formula I L—M—R  (I)  or b) of cationic alkaline earth metal complexes of the formula II [D→M—R]+X−  (II),  where M: is Ca, Sr or Ba, L: is a polymerization-inactive ligand, R: is a polymerization-active ligand, D: is a donor ligand, and X: is a non-coordinating anion, and processes for the preparation of the polymerization initiators and processes for anionic polymerization in the presence of the polymerization initiators.
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: June 4, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Konrad Knoll, Hans-Herbert Brintzinger, Sjoerd Harder, Armin Weeber, Florian Feil