Patents by Inventor Ralf Emmert

Ralf Emmert 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).

  • Skin-coloring powder mixture
    Patent number: 6399044
    Abstract: The invention related to powder mixtures containing formaldehyde- and/or formic acid-releasing compounds which have skin-tanning properties, which powder mixtures contain an agent which forms sulphite ions and, if appropriate, a stabilizer, and to the preparation and use of these powder mixtures for manufacturing cosmetic or pharmaceutical preparations.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: June 4, 2002
    Assignee: Merck Patent Gesellschaft Mit
    Inventors: Thekla Kurz, Sabine Hitzel, Roland Martin, Ralf Emmert
  • Non-lustrous pigments
    Patent number: 6019831
    Abstract: The present invention relates to non-lustrous iron oxide-containing color pigments based on dry-milled inorganic plateletlike substrates having a particle size of <60 .mu.m, characterized in that the iron oxide compound is yellow FeO(OH) and/or Fe.sub.2 O.sub.3.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: February 1, 2000
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Christoph Schmidt, Claudia Seibel, Margarete Herbski, Ralf Emmert, Klaus Ambrosius
  • Light-stable cosmetic composition
    Patent number: 5718906
    Abstract: A light-stable cosmetic composition for protection from UV rays having a wavelength of between 280 and 400 nm, which contains at least one tetraalkylquercetin in a cosmetically acceptable oil-based medium, and new tetraalkylquercetins.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: February 17, 1998
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Roland Martin, Ralf Emmert, Thekla Kurz, Gerd Bauer, Ulrich Heywang
  • Skin-coloring powder mixture
    Patent number: 5656262
    Abstract: The invention relates to powder mixtures containing formaldehyde- and/or formic acid-releasing compounds which have skin-tanning properties, which powder mixtures contain an agent which forms sulphite ions and, if appropriate, a stabilizer, and to the preparation and use of these powder mixtures for manufacturing cosmetic or pharmaceutical preparations.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: August 12, 1997
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Thekla Kurz, Sabine Hitzel, Roland Martin, Ralf Emmert
  • Golden color luster pigments
    Patent number: 5009711
    Abstract: The application relates to a preferably golden color luster pigment based on lamellar substrates, in particular mica, which have been coated with metal oxides, the metal oxide layer containing both titanium and iron and the pigment containing mainly a pseudobrookite layer formed by simultaneous precipitation of the metal oxides. This golden color luster pigment is suitable for cosmetic articles because of its physiological acceptability and is particularly suitable for silicate melts because of its resistance to heat and chemicals.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: April 23, 1991
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Ralf Emmert, Manfred Weigand
  • Platelet-shaped iron oxide pigments
    Patent number: 4780140
    Abstract: The invention relates to platelet-shaped pigments of the formula Al.sub.x Fe.sub.2-x O.sub.3-y, wherein x has a value from 0.02 to 0.5 and y has a value from 0.3 to 1.0, which are optionally coated with further oxides.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: October 25, 1988
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Klaus D. Franz, Reiner Esselborn, Ralf Emmert, Hans D. Bruckner