Patents by Inventor Eric J. M. de Boer

Eric J. M. de Boer 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).

  • Process for the preparation of ethylene polymers
    Patent number: 7202315
    Abstract: A process for polymerizing ethylene comprising contacting under polymerization condition ethylene and optionally one or more olefins with a catalyst system obtainable by contacting: a bis amido compound of formula (I) wherein Y is Si, Ge and Sn; X is hydrogen, halogen or an hydrocarbon radical; R1, R2, R3, R4, R5 and R6, are hydrocarbon radical; Q is a neutral Lewis base; and m is 0–2; one or more boron activating cocatalysts and one or more aluminum alkyls or alumoxanes.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: April 10, 2007
    Assignee: Basell Polyolefine GmbH
    Inventors: Tiziano Dall'Occo, Andrew D. Horton, Bart J. Ruisch, Klaas L. von Hebel, Arie van Zon, Henri H. Deuling, Eric J. M. de Boer
  • Process for the preparation of ethylene polymers
    Publication number: 20040097668
    Abstract: A process for polymerizing ethylene comprising contacting under polymerization condition ethylene and optionally one or more olefins with a catalyst system obtainable by contacting: a bis amido compound of formula (I) wherein Y is Si, Ge and Sn; X is hydrogen, halogen or an hydrocarbon radical; R1, R2, R3, R4, R5 and R6, are hydrocarbon radical; Q is a neutral Lewis base; and m is 0-2; one or more boron activating cocatalysts and one or more aluminum alkyls or alumoxanes.
    Type: Application
    Filed: March 24, 2003
    Publication date: May 20, 2004
    Applicants: SANTAN PHARMACEUTICAL CO., LTD., ASAHI GLASS COMPANY., LTD.
    Inventors: Tiziano Dall'Occo, Andrew D. Horton, Bart J. Ruisch, Klaas L. Hebel, Arie van Zon, Henri H. Deuling, Eric J. M. de Boer
  • Production of alkali metallated olefin polymers
    Patent number: 5364911
    Abstract: Novel metallated polyolefins are produced by contacting a polyolefin having a vinylidene group in the terminal portion with organoalkali metal compound in the presence of alkali metal t-alkoxide or tertiary amine. The metallated polyolefin is used to initiate the polymerization of polymerizable monomers to produce block copolymers of at least two blocks, at least one of which is saturated polyolefin.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: November 15, 1994
    Assignee: Shell Oil Company
    Inventors: Eric J. M. De Boer, Fred F. Hage, Adriaan A. Van Der Huizen, Carl L. Willis