Patents by Inventor Josef Hewing

Josef Hewing 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 of making iron powder
    Patent number: 3975186
    Abstract: Iron oxide particles are made by spray calcination and the oxide is reduced at least substantially in CO at temperatures between 800.degree. and 1000.degree. C. The oxide is heat-treated prior to calcination or CaO is added to enhance formation of iron fibers. The reducing atmosphere may in parts include hydrogen or the last phase of reduction is carried out in hydrogen. The iron cake is cooled and broken up in a grinder. The resulting powder has low bulk density due to a fiber-like, non-porous consistency of its particles. Grinding may continue to increase bulk density.
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: August 17, 1976
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Klaus Grebe, Hans DE Haas, Norbert Dautzenberg, Josef Hewing
  • Method of making dummy bullets
    Patent number: 3951035
    Abstract: An iron powder is compressed into a disintegrating bullet used for practice ammunition. The powder having a predetermined particle dimension is obtained by atomizing a molten mass of steel with pressurized water. The powder is annealed subsequently, then crushed, scrubbed and sieved to obtain particles at a size preferably between 0.4 to 1 mm.
    Type: Grant
    Filed: November 27, 1972
    Date of Patent: April 20, 1976
    Assignees: Nederlandsche Wapen-en Munitiefabriek De Kruithoorn N.V., Mannesmann Aktiengesellschaft
    Inventors: Norbert Dautzenberg, Josef Hewing, Max Michalke, Henri Weber