Patents by Inventor Heinrich Hahn

Heinrich Hahn 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: 6942356
    Abstract: A rod-shaped light fitting (8) for a showcase, whose length corresponds to the distance between two opposite side surfaces (4, 6) of the showcase which are plane-parallel to one another, comprises a plurality of light-emitting diodes (12) and can be positioned between the said side surfaces (4, 6) in such manner that the contacts (16) fixed in each end (9) of the rod-shaped light fitting (8) and electrically connected to the light-emitting diodes (12) press against the side surfaces (4, 6) under spring loading and at the same time establish electrical connection with the electrically conductive layer provided on the side of the side surfaces (4, 6) facing the inside of the showcase, the said layers being connected to a current source. Such a light fitting can be positioned in any desired position in a showcase to illuminate the objects displayed therein.
    Type: Grant
    Filed: May 8, 2001
    Date of Patent: September 13, 2005
    Assignee: Glasbau Hahn GmbH & Co. KG
    Inventor: Till Heinrich Hahn
  • Patent number: 4331465
    Abstract: The invention relates to a method of preventing smoldering decomposition of multiple-nutrient fertilizers containing ammonium nitrate at elevated temperatures by treatment of the granulated, dried and screened fertilizer with ammonia.
    Type: Grant
    Filed: December 6, 1979
    Date of Patent: May 25, 1982
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Heinrich Hahn, Hans-Friedrich Kurandt
  • Patent number: 4142885
    Abstract: An improved process in the preparation of sustained release fertilizer compositions which comprises subjecting a preponderantly water-soluble granular fertilizer composition first to accretive granulation under accretive granulation conditions with a melt, solution or slurry of one or several fertilizers and in a second stage coating these treated grains with a suitable almost impermeable envelopment.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: March 6, 1979
    Assignee: Veba-Chemie Aktiengesellschaft
    Inventors: Hans Heumann, Heinrich Hahn, Walter Hilt, Heinz Liebing, Manfred Schweppe
  • Patent number: 4104362
    Abstract: Ammonium polyphosphate is manufactured on a continuous basis by reacting gaseous ammonia and aqueous phosphoric acid at elevated temperatures in a one or multiple stage falling film reaction zone in the presence of a diluting gas if desired, using wet phosphoric acid, preferably containing 28-32%, by weight P.sub.2 O.sub.5 and an excess of ammonia. The phosphoric acid and the gaseous ammonia are preferably carried in counterflow and the temperature in the falling film reaction zone is adjusted using heat transfer fluids to within the range of 120.degree. - 260.degree. C.
    Type: Grant
    Filed: March 22, 1976
    Date of Patent: August 1, 1978
    Assignee: Veba-Chemie Aktiengesellschaft
    Inventors: Heinrich Hahn, Hans Heumann, Heinz Liebing, Manfred Schweppe, Walter Hilt
  • Patent number: 4001377
    Abstract: Stabilized ammonium nitrate is prepared from ammonium nitrate melts by removing substantially all of the water from said ammonium nitrate melt, then adding polyphosphates in an amount of 0.1 to 1.0% by weight and finally converting the melt to a solid state.
    Type: Grant
    Filed: October 17, 1974
    Date of Patent: January 4, 1977
    Assignee: Veba-Chemie AG
    Inventors: Heinrich Hahn, Hans Heumann, Manfred Schweppe