Patents by Inventor Henricus J. Arts

Henricus J. Arts 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
  • Indenyl compounds and catalyst components for the polymerization of olefins
    Patent number: 5990253
    Abstract: The invention relates to an indenyl compound of the general formulaR'Ind--M--(Cp)Q.sub.kin which the symbols have the following meanings:Ind: an indenyl groupR': a substituent, other than hydrogen, to the Ind group,Cp: a cyclopentadienyl groupM: a transition metal from group 3, 4, 5 or 6 of the Periodic System of ElementsQ: a ligand to Mand k is an integer linked to the valence of M.The invention is characterized in that the R' group is bound to the Ind group at the 2-position. The indenyl compound is a catalyst component for the polymerization of olefins. The invention also relates to polymers obtainable with such indenyl compounds.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: November 23, 1999
    Assignee: DSM N.V.
    Inventors: Johannus A. M. van Beek, Johannes G. de Vries, Henricus J. Arts, Radjindrakumar Persad, Gerardus H. J. van Doremaele
  • Catalyst composition and process for the polymerization of an olefin
    Patent number: 5986029
    Abstract: The invention relates to a new catalyst composition which is suitable for the polymerization of an olefin and which comprises a reduced transition metal complex and a co-catalyst. The invention is characterized in that the transition metal complex consists of a reduced transition metal, chosen from groups 4-6 of the Periodic Table of the Elements, with a multidentate monoanionic ligand and with two monoanionic ligands. In particular the reduced transition metal is titanium (Ti).
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: November 16, 1999
    Assignee: DSM N.V.
    Inventors: Johannes A. M. van Beek, Gerardus H. J. van Doremaele, Gerardus J. M. Gruter, Henricus J. Arts, Guillaume H. M. R. Eggels
  • Indenyl compounds and catalyst components for the polymerization of olefins
    Patent number: 5646322
    Abstract: The invention relates to an indenyl compound of the general formulaR'Ind--M--(Cp)Q.sub.kin which the symbols have the following meanings:Ind: an indenyl groupR': a substituent, other than hydrogen, to the Ind group,Cp: a cyclopentadienyl groupM: a transition metal from group 3, 4, 5 or 6 of the Periodic System of ElementsQ: a ligand to Mand k is an integer linked to the valence of M.The invention is characterized in that the R' group is bound to the Ind group at the 2-position. The indenyl compound is a catalyst component for the polymerization of olefins.The invention also relates to polymers obtainable with such indenyl compounds.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: July 8, 1997
    Assignee: DSM N.V.
    Inventors: Johannus A. M. van Beek, Johannes G. de Vries, Henricus J. Arts, Radjindrakumar Persad, Gerardus H. J. van Doremaele
  • Process for the preparation of substituted pyridines via 1-aza-1,3-butadienes and the 1-aza-1,3-butadiene intermediates
    Patent number: 5438143
    Abstract: Process for the preparation of substituted pyridines by allowing 1-aza-1,3-butadienes to react, in the presence of a catalytic amount of secondary amine and acid, with an aldehyde or ketone, and new 1-aza-1,3-butadienes which are used in this process. Said pyridines can be obtained in high yield in a simple process with a short reaction time. The 1-aza-1,3-butadiene can, if so desired, be prepared in situ from an imine and an aldehyde.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: August 1, 1995
    Assignee: DSM N.V.
    Inventors: Anna M. C. F. Castelijns, Henricus J. Arts
  • 2,4-dimethyl-5-oxohexane and a method of use therefor
    Patent number: 5334721
    Abstract: The invention relates to a process for the preparation of high yields of 5-oxohexane nitriles with minimum formation of 1 undesired isomer. Such nitriles may be utilized as starting materials for the preparation of pharmaceutical and agrochemical intermediates and as well as final products. The process comprises reacting a methyl ketone and an .alpha.,.beta.-unsaturated nitrile in the presence of a catalytically effective amount of a strong base. One of the products which may be created by the process is 2,4-dimethyl-5-oxohexane nitrile.
    Type: Grant
    Filed: July 29, 1993
    Date of Patent: August 2, 1994
    Assignee: Stamicarbon B.V.
    Inventors: Anna M. C. F. Castelijns, Henricus J. Arts, Richard Green
  • Process for the preparation of 5-oxohexane nitriles and the compound 2,4-dimethyl-5-oxohexane nitrile
    Patent number: 5254712
    Abstract: The invention relates to a process for the preparation of high yields of 5-oxohexane nitriles with minimum formation of 1 undesired isomer. Such nitriles may be utilized as starting materials for the preparation of pharmaceutical and agrochemical intermediates and as well as final products. The process comprises reacting a methyl ketone and an .alpha.,.beta.-unsaturated nitrile in the presence of a catalytically effective amount of a strong base. One of the products which may be created by the process is 2,4-dimethyl-5-oxohexane nitrile.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: October 19, 1993
    Assignee: Stamicarbon B.V.
    Inventors: Anna M. C. F. Castelijns, Henricus J. Arts, Richard Green