Patents by Inventor John Wynstra

John Wynstra 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 producing particulate resoles from aqueous dispersion
    Patent number: 4206095
    Abstract: Particulate resoles are produced by reacting a phenol, formaldehyde, and an amine in an aqueous medium containing a protective colloid, to produce an aqueous suspension of a particulate resole, and recovering the particulate resole from said suspension.
    Type: Grant
    Filed: December 21, 1978
    Date of Patent: June 3, 1980
    Assignee: Union Carbide Corporation
    Inventors: John Wynstra, Sidney J. Schultz
  • Process for producing particulate filler-containing resole molding compositions from aqueous dispersion
    Patent number: 4182696
    Abstract: Particulate, solid, heat-reactive, filler-containing resole molding compositions are directly produced by reacting a phenol, formaldehyde, and an amine in an aqueous medium containing a water-insoluble filler material having reactive sites on the surface thereof which chemically bond with a phenolic resin and protective colloid to produce an aqueous suspension of a particulate filler-containing resole, and recovering the filler-containing resole from said suspension.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: January 8, 1980
    Assignee: Union Carbide Corporation
    Inventors: John Wynstra, Sidney J. Schultz