Patents by Inventor Manfred Barthels

Manfred Barthels 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).

  • Regeneration of caffeine-loaded activated carbon with hot water
    Patent number: 4506072
    Abstract: The invention relates to a process for recovering caffeine adsorbed to activated carbon with simultaneous regeneration of the activated carbon in which the caffeine-loaded activated carbon is treated with water at a pressure of at least 86 bar and at a temperature of at least 300.degree. C.
    Type: Grant
    Filed: April 18, 1983
    Date of Patent: March 19, 1985
    Assignee: Hag GF Aktiengesellschaft
    Inventors: Manfred Gehrig, Manfred Barthels, Hans Wienges
  • Pressure relief valve for packing containers
    Patent number: 4134535
    Abstract: A pressure relief valve for packages in which the valve element comprises a liquid impregnated porous element covering outlet openings in the package, with the liquid layer in the porous element being torn open by package contents pressures in excess of a predetermined value to permit gas outflow from the package.
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: January 16, 1979
    Assignee: HAG Aktiengesellschaft
    Inventors: Manfred Barthels, Peter Werkhoff, Otto Vitzthum