Patents by Inventor Alonzo H. Searl

Alonzo H. Searl 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).

  • Foamed polymer tubing
    Patent number: 4713271
    Abstract: Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to as much as 50% of an elastomer.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: December 15, 1987
    Assignee: Cosden Technology, Inc.
    Inventors: Alonzo H. Searl, Granville J. Hahn, Raleigh N. Rutledge
  • Heat exchanger apparatus for extruding thermoplastic compositions
    Patent number: 4621678
    Abstract: Disclosed is heat exchange apparatus for controlling the temperature of a resin after leaving an extruder and prior to extrusion through a die in an extrusion process, comprising a heat exchanger having an inlet and outlet for an extruded heat-plastified resin and an inlet and an outlet for a heat exchange medium to be circulated in heat exchanging relationship with the extruded resin; a selective heater for receiving the heat exchange medium from the heat exchanger, the heater heating the heat exchange medium to a predetermined temperature during a start-up phase of the heat exchange device; a cooler adapted for receiving a portion of the heat exchange medium from the heater, the cooler including an inlet and an outlet for the heat exchange medium and an inlet and an outlet for a cooling medium to be circulated in heat exchanging relationship with the heat exchange medium; control means interposed between the heater and the cooler for selectively directing a portion of the heat exchange medium to said cooler
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: November 11, 1986
    Assignee: Cosden Technology, Inc.
    Inventors: Granville J. Hahn, Raleigh N. Rutledge, Alonzo H. Searl, Walter E. Sommerman
  • Process and apparatus for manufacturing flexible foamed articles
    Patent number: 4526736
    Abstract: Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to about 25% of an elastomer.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: July 2, 1985
    Assignee: Cosden Technology, Inc.
    Inventors: Alonzo H. Searl, Granville J. Hahn, Raleigh N. Rutledge
  • Process and apparatus for manufacturing flame retardant flexible foamed articles
    Patent number: 4451586
    Abstract: Process and apparatus are disclosed for manufacturing foamed articles such as tubes used as pipe insulation, which tubes are of a high impermeability and flexibility and are formed of a polymer, such as polyethylene or polypropylene, containing up to about 25% of an elastomer.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: May 29, 1984
    Assignee: Cosden Technology, Inc.
    Inventors: Alonzo H. Searl, Granville J. Hahn, Raleigh N. Rutledge