Patents by Inventor Holger Ohst

Holger Ohst 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: 5439964
    Abstract: A molding compound is disclosed which is useful in producing inorganic sintered moldings, which contains, in addition to an inorganic powder, a binder system containing a thermoplastically processable, partially crystalline polyester and an additional low molecular weight compound which may react with the polyester. A process is disclosed for preparing a sintered molding by injection molding of the molding compound, removal of the binder system, and sintering.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: August 8, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Holger Ohst, Lothar Schonfelder, Stefan Roth
  • Patent number: 5403463
    Abstract: An electrochemical sensor having at least two electrodes that communicate with a liquid measurement cell electrolyte and a housing that encloses the electrodes and the electrolyte. The surfaces of the electrodes facing the electrolyte bridge web connecting the electrodes are covered with a semipermeable membrane.
    Type: Grant
    Filed: April 14, 1994
    Date of Patent: April 4, 1995
    Assignee: Mannesmann Aktiengesellschaft
    Inventors: Christoph Braden, Jacques Deprez, Holger Ohst, Dirk Pfenning, Karlheinz Hildenbrand
  • Patent number: 5372924
    Abstract: Antistatically treated plastic moldings which contain two layers on the surface to be antistatically treated, the layer situated nearer the plastic surface being an antistatic layer and the more remote layer being a protective layer of a radiation-curing coating composition which is cured by exposure to ionizing radiation, are distinguished by excellent antistatic properties and very good surface properties.
    Type: Grant
    Filed: May 16, 1994
    Date of Patent: December 13, 1994
    Assignee: Agfa Gevaert Aktiengesellschaft
    Inventors: Dirk Quintens, Wolfgang Fischer, Friedrich Jonas, Holger Ohst, Hans Rehbein, deceased
  • Patent number: 5308489
    Abstract: The invention relates to blends of polyether copolycarbonates and other thermoplastics, to their production and to their use for the production of membranes, more particularly for dialysis.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: May 3, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Dhein, Wolfgang Ebert, Herbert Hugl, Holger Ohst
  • Patent number: 5283213
    Abstract: A moulding compound is described which contains an inorganic powder together with a binder system. The binder system contains a thermoplast having a melting temperature greater than 180.degree. C. A process is also described for making a sintered molding from the molding compound, which process includes the steps of injection moulding, removal of the binder by heating, and sintering.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: February 1, 1994
    Assignee: Bayer Aktiengesellschaft
    Inventors: Holger Ohst, Rolf Dhein, Lothar Schonfelder
  • Patent number: 5194393
    Abstract: The present invention relates to a sensor with a novel construction for a detection method of molecules labelled with fluorescent dye for detecting these dissolved substances or analytes by energy transfer with a simple fluorescence technique and increased sensitivity in the detection as well as versatile use for different tasks and the possibility of reproducible preparation of films bound to solid surfaces.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: March 16, 1993
    Assignee: Bayar Aktiengesellschaft
    Inventors: Herbert Hugl, Eberhard Kuckert, Dietmar Mobius, Holger Ohst, Meinhard Rolf, Hans J. Rosenkranz, Heinrich C. Schopper, Hans-Ulrich Siegmund, Klaus Sommer, Rolf Wehrmann
  • Patent number: 5036151
    Abstract: The invention relates to trimerized aliphatic isocyanates produced by special processes, to their use as mold release agents in thermoplastic aromatic polycarbonates and/or thermoplastic aromatic polyestercarbonates and/or thermoplastic aromatic polyesters, optionally using standard additives, to the readily demoldable molding compounds thus obtained on the basis of the thermoplastic polycarbonates, polyestercarbonates and/or polyesters and to processes for the production of these readily demoldable molding compounds.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: July 30, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Holger Ohst, Helmut-Martin Meier, Klaus Kircher
  • Patent number: 4894312
    Abstract: Dye diffusion images can be produced by a rapid process in which a first sheet material which contains at least one light sensitive silver halide emulsion on a layer support and at least one color producing compound capable of releasing a diffusible dye on development and/or a second, light insensitive sheet material containing a layer of binder in which is incorporated a salt of a weakly acidic organic compound and a strong organic base is or are moistened with an aqueous liquid and the two sheet materials are then heated to 40.degree.-120.degree. C. with their coated surfaces in contact and subsequently separated.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: January 16, 1990
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Holger Ohst, Carlhans Suling, Gunther Schenk, Kaspar Wingender, Manfred Peters, Immo Boie
  • Patent number: 4840989
    Abstract: The invention relates to copolymers containing 0.01 to 35 mole-% relative to the total monomer composition, of one or more polymerized perfluoroalkyl group-containing monomer units, 55 to 99.99 mole-% of one or more polymerized N-vinylamide monomer units, and 0 to 10 mole-% of one or more further comonomers, a process for the preparation of the copolymers, and their use as emulsifiers and dispersants in aqueous systems.
    Type: Grant
    Filed: September 26, 1988
    Date of Patent: June 20, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Holger Ohst, Wolfgang Podszun, Carlhans Suling, John Goossens, Gunther Penners