Patents by Inventor Harold H. Kuehn

Harold H. Kuehn 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: 4063641
    Abstract: A flexible packaging film formed of two layers of transparent film joined together along superimposed inner faces wherein the inner face of each layer includes printed indicia, to thereby enable indicia to be legible from either side of the film. A particularly useful method for the manufacture of the film is also disclosed.
    Type: Grant
    Filed: March 5, 1975
    Date of Patent: December 20, 1977
    Assignee: Philip Morris Industrial Incorporated
    Inventors: Harold H. Kuehn, Peter M. Mittmann
  • Patent number: 3937847
    Abstract: A method of preserving foodstuffs by placing them in a container of given volume in which air at atmospheric pressure is present and selectively removing the oxygen from the air in the container while maintaining substantially atmospheric pressure therein is disclosed. According to the invention, a flow of air is established through the container by means of an external conduit in which the oxygen in the air is catalytically reacted with hydrogen gas concurrently generated and added to the air flow for at least a predetermined length of time after which the generation and addition of hydrogen gas is terminated when the hydrogen/oxygen reaction falls below a given level. Various embodiments of the apparatus for practicing the method according to this invention are described.
    Type: Grant
    Filed: August 2, 1974
    Date of Patent: February 10, 1976
    Inventors: William Elkins, Harold H. Kuehn, Richard H. Chamberlin