Patents by Inventor Henry Cohrt

Henry Cohrt 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).

  • Method for producing a component by means of powdery starting material and extractor suitable therefore
    Patent number: 7018583
    Abstract: According to a known method for producing a component by means of a powdery starting material, powder is mixed with auxiliaries comprising binding agents, whereby a free-flowing mass is produced. A green body is produced from the mass by means of powder injection moulding. A portion of the auxiliaries is extracted by heating the green body in a container and exposing said body to a stream of solvents. The green body is sintered, whereby the component is produced. The aim of the invention is to enable fast and gentle extraction for releasing green bodies which are produced by means of powder injection moulding. According to the invention, the extraction comprises a heating-up phase during which the temperature of the green body is permanently or gradually increased and the green body is overflown by solvent in the form of a compressed, supercritical treatment gas.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: March 28, 2006
    Assignee: Messer Griesheim GmbH
    Inventors: Thomas Berger, Henry Cohrt, Heribert Dierkes
  • Method for producing a component by means of powdery starting material and extractor suitable therefore
    Publication number: 20030218277
    Abstract: According to a known method for producing a component by means of a powdery starting material, powder is mixed with auxiliaries comprising binding agents, whereby a free-flowing mass is produced. A green body is produced from the mass by means of powder injection moulding. A portion of the auxiliaries is extracted by heating the green body in a container and exposing said body to a stream of solvents. The green body is sintered, whereby the component is produced. The aim of the invention is to enable fast and gentle extraction for releasing green bodies which are produced by means of powder injection moulding. According to the invention, the extraction comprises a heating-up phase during which the temperature of the green body is permanently or gradually increased and the green body is overflown by solvent in the form of a compressed, supercritical treatment gas.
    Type: Application
    Filed: March 24, 2003
    Publication date: November 27, 2003
    Inventors: Thomas Berger, Henry Cohrt, Heribert Dierkes