Patents by Inventor Josephus H. van Deursen

Josephus H. van Deursen 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).

  • Cycloolefin purification method
    Patent number: 5245108
    Abstract: A process for selectively reducing the 5-isopropenyl-2-norbornene content of a dicyclopentadiene composition by contacting a 5-isopropenyl-2-norbornene containing DCPD composition with an acid clay.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: September 14, 1993
    Assignee: Shell Research Limited
    Inventors: Josephus H. Van Deursen, Petrus A. J. M. Hendriks
  • Carbon monoxide/cyclopenten copolymer and preparation with aromatic dinitro compound
    Patent number: 5066778
    Abstract: When a linear alternating polymer of carbon monoxide and a cyclopentene compound is produced in the presence of a catalyst composition comprising a compound of palladium, and anion of a non-hydrohalogenic acid having a pKa below 2 and a bidentate ligand, an improved process results when an aromatic meta-dinitro compound is provided to the catalyst composition mixture.
    Type: Grant
    Filed: January 30, 1990
    Date of Patent: November 19, 1991
    Assignee: Shell Oil Company
    Inventors: Josephus H. Van Deursen, Johannes A. Van Doorn, Eit Drent, Pui K. Wong
  • Process for the preparation of thermoplastic fibers
    Patent number: 5045258
    Abstract: A process for the preparation of thermoplastic fibers which comprises:(a) spinning a solution of an alternating copolymer of an olefinically unsaturated compound and carbon monoxide, having a number average molecular weight of at least 5000, to fibers through a spinning aperture, said solution having a polymer content in the range of from 0.1-50% m(b) submitting the thus obtained fibers to a solvent-removal treatment to remove substantially all the solvent, and(c) stretching the thus obtained substantially solvent-free fibers in an environment having a temperature between the glass-transition temperature of said polymer and (T+20).degree. C., when T is the crystalline melting point of the polymer.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: September 3, 1991
    Assignee: Shell Oil Company
    Inventors: Adriaan W. van Breen, Josephus H. van Deursen, Franciscus I. M. Wetser