Patents by Inventor Peter J. N. Meyer

Peter J. N. Meyer 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 a homogeneous thermoplastic polymer
    Patent number: 4921906
    Abstract: The invention relates to a process for the preparation of a thermoplastic polymer on the basis of an alkenyl aromatic monomer, an unsaturated dicarboxylic anhydride, and, optionally, a rubber, characterized in that the monomers and/or solution thereof are/is reacted in at least two reaction zones that are in open connection with each other at the top and at the bottom, the reaction mixture being circulated through the reaction zones by means of a mixing device and/or a conveying device.Using the process, a homogeneous product of constant composition is obtained.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: May 1, 1990
    Assignee: Stamicarbon B.V.
    Inventors: Peter J. N. Meyer, Reinard J. M. Steeman
  • Process for the preparation of a thermoplastic polymer
    Patent number: 4772671
    Abstract: A process for the preparation of a thermoplastic polymer on the basis of an alkenyl-aromatic monomer and an unsaturated dicarboxylic acid comprises the addition of 10 to 100 ppm relative to the polymer wt. % of an acid during polymerization. Suitable acids that can be applied are carboxylic acids, and sulphur- and /or phosphorus-containing acids or their mixtures.
    Type: Grant
    Filed: October 15, 1986
    Date of Patent: September 20, 1988
    Assignee: Stamicarbon B.V.
    Inventors: Reinard J. M. Steeman, Peter J. N. Meyer
  • Method for the preparation of N-methyl and -N-ethyl-1-pyrrolidones
    Patent number: 4404391
    Abstract: The invention relates to a process for the preparation of a N-alkyl-2-pyrrolidone by reducing the corresponding N-(.alpha.-hydroxyalkyl)-2-pyrrolidone in the liquid phase under an atmosphere of hydrogen gas and in the presence of a noble metal hydrogenation catalyst while in the absence of trifluoroacetic acid.
    Type: Grant
    Filed: April 1, 1981
    Date of Patent: September 13, 1983
    Assignee: Stamicarbon B.V.
    Inventors: Peter J. N. Meyer, Josef M. Penders
  • Process for the preparation of a 2-pyrrolidone
    Patent number: 4325872
    Abstract: An improved method for hydrogenating succinonitrile, optionally carrying substituents, to form 2-pyrrolidones, in the liquid phase in the presence of ammonia, using a fixed-bed catalyst wherein the catalyst may be regenerated by successively passing liquid ammonia at 75.degree.-130.degree. C., then hydrogen at 130.degree.-350.degree. C., and then liquid ammonia again at 75.degree.-130.degree. C. over the catalyst.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: April 20, 1982
    Assignee: Stamicarbon, B.V.
    Inventors: Peter J. N. Meyer, Johannes G. M. Nieuwkamp
  • Process for the preparation of delta keto-acids and derivatives thereof
    Patent number: 4267362
    Abstract: A process is described for the preparation of delta keto-acids wherein there is used as a catalyst the condensation adduct of a cyclic secondary amine with an .alpha.-.beta.-acrylic-type unsaturated compound, providing high selectivity and conversion results.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: May 12, 1981
    Assignee: Stamicarbon, B.V.
    Inventors: Peter J. N. Meyer, Josef M. Penders