Patents by Inventor Wilhemus M. M. Roovers

Wilhemus M. M. Roovers 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 mixture which comprises an aromatic polycarbonate and a polyalkylene terephthalate, and articles formed therefrom
    Patent number: 5062984
    Abstract: The invention relates to polymer mixtures comprising A. an aromatic polycarbonate and B. a polyalkylene terephthalate. It has been found that the cosmetic properties of articles obtained by injection-moulding the polymer mixture can be improved by the addition of cross-linked polymer particles having an average particle size from 1 to 30 micrometers.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: November 5, 1991
    Assignee: General Electric Company
    Inventors: Wilhemus M. M. Roovers, Jan de Boer
  • Polymer mixture comprising aromatic polycarbonate and two agents to improve the impact strength; articles formed therefrom
    Patent number: 5025055
    Abstract: A polymer mixture having a lower ductile/brittle fracture transition temperature is obtained by adding a dialkyl silicone fluid polymer to a polymer mixture which comprises an aromatic polycarbonate and two agents to improve the impact strength.
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: June 18, 1991
    Assignee: General Electric Company
    Inventors: Wilhelmus J. L. A. Hamersma, Torben P. Kempers, Wilhemus M. M. Roovers