Patents by Inventor Hermann David Hartman

Hermann 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).

  • Residual gas extraction process
    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
  • Floatable lounger with rotating headrest
    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