Patents by Inventor Donald F. Wiley

Donald F. Wiley 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).

  • Co-extrusion of ABS/polystyrene multiple-layered sheeting
    Patent number: 4100237
    Abstract: A process is disclosed for producing composite sheeting of polystyrene having a thin protective layer of ABS polymer. The process comprises joining a molten stream of each polymeric material in a single extruder discharge conduit such that there is produced a single molten stream having a reasonably well defined interface between the two types of polymeric material, and thereafter, passing the resulting single stream of material through a sheet-form extrusion die having its die lips generally aligned with the foregoing interface.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: July 11, 1978
    Assignee: Cosden Technology, Inc.
    Inventor: Donald F. Wiley
  • Co-extrusion of polyvinylidene fluoride/polystyrene multiple-layered sheeting
    Patent number: 4051293
    Abstract: A process is disclosed for producing composite sheeting of polystyrene having a thin protective layer of vinylidene fluoride polymer. The process comprises joining a molten stream of each polymeric material in a single extruder discharge conduit such that there is produced a single molten stream having a reasonably well defined interface between the two types of polymeric material, and thereafter, passing the resulting single stream of material through a sheet-form extrusion die having its die lips generally aligned with the foregoing interface.
    Type: Grant
    Filed: March 2, 1976
    Date of Patent: September 27, 1977
    Assignee: Cosden Oil & Chemical Company
    Inventor: Donald F. Wiley
  • Method of co-extrusion of polyvinylidene fluoride/polystyrene multiple-layered sheeting
    Patent number: 3968196
    Abstract: A process is disclosed for producing composite sheeting of polystyrene having a thin protective layer of vinylidene fluoride polymer. The process comprises joining a molten stream of each polymeric material in a single extruder discharge conduit such that there is produced a single molten stream having a reasonably well defined interface between the two types of polymeric material, and thereafter, passing the resulting single stream of material through a sheet-form extrusion die having its die lips generally aligned with the foregoing interface.
    Type: Grant
    Filed: March 29, 1971
    Date of Patent: July 6, 1976
    Assignee: Cosden Oil & Chemical Company
    Inventor: Donald F. Wiley
  • Coextrusion process
    Patent number: 3959432
    Abstract: A process for the manufacture of composite sheeting having a layer of polystyrene and at least one layer of polycarbonate polymer firmly united thereto, comprising joining a molten stream of each of said polymeric materials in a conduit to form a single stratified stream of molten material conforming to the cross-section of said conduit and having a relatively sharply defined interface between said polymeric materials, and passing said stratified stream of molten material through a sheet-form extrusion die having its die lips generally aligned with said interface between the two polymeric materials.
    Type: Grant
    Filed: January 24, 1973
    Date of Patent: May 25, 1976
    Assignee: Cosden Oil & Chemical Company
    Inventor: Donald F. Wiley