Patents by Inventor Richard F. Freeman

Richard F. Freeman 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).

  • Microwave heating apparatus
    Patent number: 5180895
    Abstract: A microwave heating apparatus comprises a heating chamber with a hemispherical reflecting cover (24). Microwave energy is thereby focussed onto foodstuff (34) contained in the chamber from at least two magnetrons (10 and 12) which feed microwave energy through flared metal waveguides (14 and 16).
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: January 19, 1993
    Assignee: Unilever Patent Holdings B.V.
    Inventors: David H. Briggs, Richard F. Freeman
  • Microwave heating apparatus with a combined food scoop and door
    Patent number: 5144105
    Abstract: A microwave heating chamber (10) has a rectangular opening (12) into which a food support (14) is slidable, the support including a handle (20) and a wall (18) which serves to close and seal the chamber when inserted. The wall (18) may have thermal break (22) with the support to prevent heat being conducted to the wall and handle. The support (14) may have several superposed platforms each to support an item of food, and each may have a rotatable dish.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: September 1, 1992
    Inventors: David H. Briggs, Richard F. Freeman
  • Microwave chamber for heating foodstuffs
    Patent number: 5142114
    Abstract: A microwave chamber for heating pre-cooked foodstuff (10) including a magnetron (14) feeding radiation via a waveguide (16). The microwave is reflected off the inside of a domed lid (18) and focussed onto the foodstuff. A deflector element may be movable in the waveguide to thereby change the pattern of microwave radiation projected onto the foodstuff.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: August 25, 1992
    Inventors: David H. Briggs, Richard F. Freeman
  • Microwave heating apparatus
    Patent number: 5136133
    Abstract: A microwave-powered heating chamber has a ceramic support (12) for foodstuff (10), and a curved surface (20) of microwave absorbing material disposed opposite a waveguide (16) which is connected to a microwave energy source, such as a magnetron (14). A reflecting shield may be temporarily positioned over the curved surface (20) to enable the foodstuff to be microwave-heated, after which the shield is removable to allow browning to occur.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: August 4, 1992
    Inventors: David H. Briggs, Richard F. Freeman
  • Coated electrode
    Patent number: 4355224
    Abstract: A coated electrode having a flux formulation that is a function of the diameter of the electrode wire. The electrode wire is made from a nickel-chromium-cobalt-molybdenum-aluminum alloy. The flux coating contains differing amounts of manganese, iron and columbium depending on the diameter of the core wire.
    Type: Grant
    Filed: August 15, 1980
    Date of Patent: October 19, 1982
    Assignee: Huntington Alloys, Inc.
    Inventors: Jack H. Mesick, Lewis E. Shoemaker, Richard F. Freeman