Patents by Inventor Thekla Kurz

Thekla Kurz 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).

  • Stable cosmetic formulation containing butylmethoxydibenzoylmethane
    Patent number: 6491930
    Abstract: The invention relates e.g. to the use of aldehydes and/or ketones for improving the stability of cosmetic formulations containing butylmethoxydibenzoylmethane as organic light protection filters in conjunction with inorganic light protection filters.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: December 10, 2002
    Assignee: Merck Patent Gesellschaft MIT
    Inventors: Thekla Kurz, HansJürgen Driller, Sabine Hitzel, Dorothee Wille
  • STABLE COSMETIC FORMULATION CONTAINING BUTYLMETHOXYDIBENZOYLMETHANE
    Publication number: 20020150599
    Abstract: The invention relates e.g. to the use of aldehydes and/or ketones for improving the stability of cosmetic formulations containing butylmethoxydibenzoylmethane as organic light protection filters in conjunction with inorganic light protection filters.
    Type: Application
    Filed: May 5, 2000
    Publication date: October 17, 2002
    Inventors: THEKLA KURZ, HANSJURGEN DRILLER, SABINE HITZEL, DOROTHEE WILLE
  • Light-stable cosmetic formulation containing butylmethoxydibenzoylmethane
    Patent number: 6436374
    Abstract: A cosmetic preparation having butylmethoxydibenzoyhmethane as a protection filter and insoluble inorganic particles which are titanium dioxide particles doped with cerium or iron ions which absorb in the UVA region and are added to improve the photostability of the cosmetic preparation.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: August 20, 2002
    Assignee: Merck Patent Gesellschaft mit beschraenkter Haftung
    Inventors: Thekla Kurz, Dorothee Wille, Sabine Hitzel
  • 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
  • Stable aqueous formulation of 3-(N-butylacetamino)-propionic acid ethyl ester
    Patent number: 6306905
    Abstract: The present invention relates to stable aqueous formulations of the insect repellent ethyl 3-(N-butyl-acetamino)propionate.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: October 23, 2001
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Thekla Kurz, Sabine Hitzel, Dorothee Wille, Mohammad Jalalian
  • Sunscreens having ultraspectral protection
    Patent number: 6187298
    Abstract: The invention relates to novel light protection filters for the VIS and IR region for the preparation of sunscreens and also to the use thereof in cosmetics. The invention further relates to sunscreens which have broad-band or ultraspectral protection.
    Type: Grant
    Filed: May 3, 2000
    Date of Patent: February 13, 2001
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Thekla Kurz, Sabine Hitzel, Dorothee Wille
  • Dispersion of inorganic UV filters
    Patent number: 6146617
    Abstract: The present invention relates to a dispersion of inorganic UV filters in liquid UV filters and their use in sunscreens.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: November 14, 2000
    Assignee: Merck Patent Gesellschaft mit
    Inventors: Thekla Kurz, Dorothee Wille, Sabine Hitzel
  • .alpha.-hydroxyketoalkyl derivatives as light protection filters
    Patent number: 5968482
    Abstract: The invention relates to the use of .alpha.-hydroxyketoalkyl derivatives as light protection filters for cosmetic or pharmaceutical products, the .alpha.-hydroxyketoalkyl group being linked, if appropriate via a spacer, to a chromophoric group which has an absorption maximum in a wavelength range of between 280 and 400 nm and has a conjugated .pi.-electron system of at least 8 .pi.-electrons, and to new .alpha.-hydroxyalkyl derivatives, processes for their preparation and pharmaceutical and cosmetic formulations comprising these derivatives as light protection substances.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: October 19, 1999
    Assignee: Merck Patent Gesellschaft MIT Beschrankter Haftung
    Inventors: Roland Martin, Ingeborg Stein, Ulrich Heywang, Michael Schwarz, Thekla Kurz
  • 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
  • Use of .alpha.-hydroxyketoalkyl derivatives as light protection filters
    Patent number: 5600007
    Abstract: The invention relates to the use of .alpha.-hydroxyketoalkyl derivatives as light protection filters for cosmetic or pharmaceutical products, the .alpha.-hydroxyketoalkyl group being linked, if appropriate via a spacer, to a chromophoric group which has an absorption maximum in a wavelength range of between 280 and 400 nm and has a conjugated .pi.-electron system of at least 8 .pi.-electrons, and to new .alpha.-hydroxyalkyl derivatives, processes for their preparation and pharmaceutical and cosmetic formulations comprising these derivatives as light protection substances.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: February 4, 1997
    Assignee: Merck Gmbh
    Inventors: Roland Martin, Ingeborg Stein, Ulrich Heywang, Michael Schwarz, Thekla Kurz
  • Skin-coloring preparation
    Patent number: 5569460
    Abstract: The invention relates to a skin-coloring preparation, containing a hydroxycarbonyl compound which has self-tanning properties, in a cosmetologically acceptable carrier, which preparation contains at least one colorant which adheres to the skin.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: October 29, 1996
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Thekla Kurz, Sieglinde Stossel, Andrea Spiller