Patents by Inventor Steven David Hartman

Steven David Hartman 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).

  • Patent number: 8621811
    Abstract: The present invention discloses an extruder for producing a thermoplastic material having a first and second portion comprising an axially extending barrel and a screw conveyer axially disposed within said barrel so as to define a passage for conveying thermoplastic material from an input through a melt zone to an output. Furthermore the present invention discloses an insulation member comprising an elongated insulation member formed of a thermoplastic insulating material, said insulating member having a top edge, a bottom edge, and first and second side edges; the top edge comprising a protrusion, said top edge extending beyond a corresponding top edge of a corresponding panel of siding; and the bottom edge comprising a ledge, said ledge operable to overlap the protrusion.
    Type: Grant
    Filed: November 4, 2008
    Date of Patent: January 7, 2014
    Inventor: Steven David Hartman
  • Publication number: 20090145065
    Abstract: The present invention discloses an extruder for producing a thermoplastic material having a first and second portion comprising an axially extending barrel and a screw conveyer axially disposed within said barrel so as to define a passage for conveying thermoplastic material from an input through a melt zone to an output. Furthermore the present invention discloses an insulation member comprising an elongated insulation member formed of a thermoplastic insulating material, said insulating member having a top edge, a bottom edge, and first and second side edges; the top edge comprising a protrusion, said top edge extending beyond a corresponding top edge of a corresponding panel of siding; and the bottom edge comprising a ledge, said ledge operable to overlap the protrusion.
    Type: Application
    Filed: November 4, 2008
    Publication date: June 11, 2009
    Applicant: Industrial Thermo Polymers Limited
    Inventor: Steven David Hartman
  • Patent number: 6576174
    Abstract: A method and apparatus for reducing residual gases from a foamed polymer material by subjecting the foamed polymer material to a vacuum.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: June 10, 2003
    Assignee: Industrial Thermo Polymers Limited
    Inventors: Hermann David Hartman, Steven David Hartman
  • Patent number: 6085394
    Abstract: A coupler and a method for securing foam tube insulation elements to one another for pipes, comprising of a strip having a top surface and a bottom surface. The top surface may have a series of tab-like projections that define openings between the top surface and the bottom surface. The top surface may also have a series of teeth.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: July 11, 2000
    Assignee: Industrial Thermo Polymers Limited
    Inventor: Steven David Hartman
  • Patent number: 5897409
    Abstract: A floatable lounger includes a first buoyancy means; second buoyancy means spaced from said first buoyancy means; first and second extending means; and headrest rotatable about said first extending means between a first stored position and a second operable position. The floatable lounger provides for a simpler construction for a floating lounger with excellent buoyancy.
    Type: Grant
    Filed: February 26, 1998
    Date of Patent: April 27, 1999
    Assignee: Industrial Thermo Polymers Limited
    Inventors: Hermann David Hartman, Steven David Hartman