Patents by Inventor Cornelis E.P.V. VAN DEN Berg

Cornelis E.P.V. VAN DEN Berg 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 polymerization of alkenes
    Patent number: 4319010
    Abstract: A process for solution polymerizing .alpha.-alkenes is disclosed, wherein the .alpha.-alkenes are polymerized at a temperature above 110.degree. C. in the presence of a catalyst which is dissolved in the reaction solvent. The catalyst is obtained by admixing a titanium compound, a magnesium compound which is not magnesiummono- or dihydrocarbyl, and an aluminum compound having the general formula AlR.sub.3-m X.sub.m, wherein R is the hydrocarbyl group, X is a halogen atom, and m is between 1 and 3.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: March 9, 1982
    Assignee: Stamicarbon, B.V.
    Inventor: Cornelis E. P. V. van den Berg
  • Solutions of organic magnesium compounds containing oxygen in hydrocarbons
    Patent number: 4178300
    Abstract: A novel process is described for the preparation of novel organic solutions of organooxy magnesium compounds of low viscosity, which solutions are formed in the presence of at least 5 mol % based on the magnesium compound of an organooxy compound of a transition metal of Groups IV through VI of the Periodic Table.
    Type: Grant
    Filed: October 31, 1978
    Date of Patent: December 11, 1979
    Assignee: Stamicarbon, B.V.
    Inventor: Cornelis E. P. V. van den Berg
  • Process for the preparation of polymer fibers
    Patent number: 4048429
    Abstract: Polymeric fibers are produced from a polymer-solvent solution without mechanical agitation means by supplying a polymer solution in a solvent to a radial-symmetrical mixing chamber and causing a rotary flow therein which subjects the polymer to shearing forces while, at the same time, adjusting the temperature of the polymer-solvent mix to just below the precipitation temperature of the polymer. Under these conditions a polymeric fiber precipitates which, after separation from the solvent, is useful in the preparation of paper and textile products.
    Type: Grant
    Filed: April 18, 1973
    Date of Patent: September 13, 1977
    Assignee: Stamicarbon B.V.
    Inventors: Cornelis E.P.V. VAN DEN Berg, Hubertus J. Vroomans
  • Process for preparing polymer fibers
    Patent number: 3995001
    Abstract: Polymer fibers are made from a solution of polymer in solvent by subjecting the solution to shear forces in a confining space by introducing a gas stream into the space in a manner to create a rotary gas flow therein and to cool the solution to a temperature at which polymer precipitates from the solution in the form of fibers.
    Type: Grant
    Filed: January 21, 1974
    Date of Patent: November 30, 1976
    Assignee: Stamicarbon B.V.
    Inventors: Hubertus J. Vroomans, Cornelis E.P.V. Van Den Berg
  • Alkene polymers modified with halogenated polyalkene
    Patent number: 3957910
    Abstract: Polymers of ethylene characterized by wide molecular weight distribution are produced by reacting the product at temperatures of at least 100.degree.C a mixture obtained by adding a alkene copolymer, containing reactive halogen to the polymerization product of ethylene optionally with a minor amount of another alpha-alkene in the presence of an active Ziegler-type polymerization catalyst.
    Type: Grant
    Filed: November 1, 1974
    Date of Patent: May 18, 1976
    Assignee: Stamicarbon B.V.
    Inventor: Cornelis E.P.V. VAN DEN Berg