Patents by Inventor Ralf Schmidt

Ralf Schmidt 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).

  • Wavelength-converting casting composition and its use
    Patent number: 6066861
    Abstract: The wavelength-converting casting composition is based on a transparent epoxy casting resin with a luminous substance admixed. The composition is used in an electroluminescent component having a body that emits ultraviolet, blue or green light. An inorganic luminous substance pigment powder with luminous substance pigments is dispersed in the transparent epoxy casting resin. The luminous substance is a phosphorous group of the general formula A.sub.3 B.sub.5 X.sub.12 :M, and the luminous substance pigments have particle sizes<20 .mu.m and a mean grain diameter d.sub.50 <5 .mu.m.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: May 23, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventors: Klaus Hohn, Alexandra Debray, Peter Schlotter, Ralf Schmidt, Jurgen Schneider
  • Process for producing anhydrous MgCl.sub.2
    Patent number: 6042794
    Abstract: A process for producing anhydrous magnesium chloride comprising steps of selective calcination of Mg-containing minerals, selective leaching of magnesium, separation of insoluble impurities, precipitation of magnesium chloride hexammoniate and thermal decomposition of the magnesium chloride hexammoniate crystals into magnesium chloride and ammonia.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: March 28, 2000
    Assignee: Norsk Hydro ASA
    Inventors: Ketil Amundsen, Hans Ragnar Eklund, Ralf Schmidt
  • Opioid peptide analogs
    Patent number: 5786447
    Abstract: Compounds of the formula I as well as methods for their preparation, their pharmaceutical preparations and their use as analgesics.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: July 28, 1998
    Assignee: Astra AB
    Inventors: Peter Schiller, Ralf Schmidt
  • Control panels for elevators
    Patent number: 5679933
    Abstract: An elevator control panel is provided with a means for selecting a destination among a plurality of destinations for the passenger using a minimum number of input devices.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: October 21, 1997
    Assignee: Weber Steuerungstechnik GmbH
    Inventors: Robert Weber, Ralf Schmidt