Patents by Inventor Pieter J. van Asperen

Pieter J. van Asperen 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).

  • Polymer composition based on a polycarbonate and a graft copolymer
    Patent number: 4560725
    Abstract: Disclosed is a polymer composition based on a polycarbonate and a graft copolymer of a vinyl aromatic compound and an unsaturated nitrile compound on a rubber-like polymer. Good flow properties are achieved by a composition consisting essentially of:A. at least one graft copolymer obtained by polymerizing 40-80 parts by weight of a monomer mixture, which mixture consists of:(1) 20-40 weight % of acrylonitrile, and(2) 60-80 weight % of styrene, in the presence of 10-25 parts by weight of a hydrocarbon rubber,B. at least one graft copolymer obtained by polymerizing 75-90 parts by weight of a monomer mixture, which mixture consists of:(1) 20-40 weight % of acrylonitrile, and(2) 60-80 weight % of styrene, in the presence of 10-25 parts by weight of a hydrocarbon rubber,C. a copolymer obtained by polymerizing 20-40 parts by weight of acrylonitrile with 60-80 parts by weight of styrene, andD.
    Type: Grant
    Filed: December 2, 1982
    Date of Patent: December 24, 1985
    Assignee: Stamicarbon B.V., Licensing Subsidiary of DSM
    Inventors: Petrus H. M. Van Bokhoven, Pieter J. Van Asperen
  • Highly stable nylon 4,6 objects
    Patent number: 4446304
    Abstract: Shaped articles are described molded from a nylon 4,6 polyamide, substantially consisting of [NH--(CH.sub.2).sub.4 --NH--CO(CH.sub.2).sub.4 --CO] units and having a relative viscosity, measured at 20.degree. C., on a solution in 96% sulfuric acid containing 1 g of polyamide in 100 ml of solution, of at least 2.0, and having highly stable high temperature, zinc-ion and chloride ion resistance characteristics.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: May 1, 1984
    Assignee: Stamicarbon B.V.
    Inventors: Reinoud J. Gaymans, Pieter J. van Asperen