Patents by Inventor Greg R. Bradtke

Greg R. Bradtke 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).

  • Dispersive reactive extrusion of polymer gels
    Patent number: 5770652
    Abstract: There is provided a process for making a gel-containing additive concentrate by mixing a reactive polymer such as SAN and a substantially immiscible carrier polymer such as polycarbonate or polystyrene and reactively extruding the reactive polymer and carrier polymer in the presence of a multi-functional crosslinking agent and catalyst
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: June 23, 1998
    Inventors: William David Richards, Greg R. Bradtke, Robert Howard Wildi, Linda McAdam Gemmell, Jack Alvon Hill, Vinod Kumar Berry, Catherine Marie Monique Pottier-Metz, John Robert Campbell, Jack Lew Little, Kenneth Gordon Powell
  • Production of low gloss additives for thermoplastic resins
    Patent number: 5530062
    Abstract: Gels useful as low gloss additives for blends of addition polymers, such as ABS resins, with polycarbonates are prepared by a melt blending operation in which a polyepoxide such as 3,4-epoxycyclohexyl 3,4-epoxycyclohexanecarboxylate is blended with at least one addition polymer such as a styrene-acrylonitrile copolymer, and concurrently with at least one aromatic polycarbonate in at least two increments. The first increment comprises about 20-60% of total polycarbonate and the second increment is subsequently introduced.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: June 25, 1996
    Assignee: General Electric Company
    Inventors: Greg R. Bradtke, Robert H. Wildi, Jack A. Hill, Kenneth G. Powell