Patents Assigned to Quest International B.V.
  • Silicone based skin care products
    Patent number: 5650146
    Abstract: The invention is concerned with silicone-based skin care products which are applied to the skin as aerosols and form a clear gel on the skin. The skin care products comprise 20-70% w/w of a silicone based water-in-oil microemulsion and 30-80% w/w of a volatile diluent. Preferably the microemulsion has a viscosity of between 1000 and 10,000 mPas.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: July 22, 1997
    Assignee: Quest International B.V.
    Inventor: Phillip David Shaw
  • Air treating gel
    Patent number: 5643866
    Abstract: An air treating gel composition comprising fragrance component, one or more glycols and dibenzylidene sorbitol acetal, the composition being free from alkaline salts and volatile organic solvents having a vapor pressure of 0.1.times..sup.mm or greater at 20.degree. C.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 1, 1997
    Assignee: Quest International B.V.
    Inventors: H. Rahman Ansari, Barbara Potts
  • Solubilizing agents
    Patent number: 5635190
    Abstract: The invention related to the use of monoalkyl citrates having an alkyl group of 7-10 carbon atoms as solubilizing agents in perfumery, cosmetics, personal care and household products consisting of oil-in-water emulsions as well as to hydrophobic cosmetic, personal care and household product ingredients containing such monoalkyl citrates. The emulsions preferably contain at least 0.01% w/w of monoalkyl citrate. Especially prefereed in monooctyl citrate.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: June 3, 1997
    Assignee: Quest International B.V.
    Inventors: Peter S. J. Cheetham, Thalie P. de Graaf, Angela Janousek, Erich Klein, Stephen D. Watkins
  • Preparation of phytosphingosine derivative
    Patent number: 5618706
    Abstract: The invention concerns a process for preparing tetraacetylphytospingosine (TAPS) using F-60-10 mating type strain of Pichia ciferrii. Such strain is subjected to mutagenesis and the high TAPS producing strains are selected by a special procedure. These strains are grown in a fed batch mode on a non-fermentative carbon source at a temperature above 26.degree. C and the TAPS collected from the fermentation medium. Glycerol is a preferred carbon source and preferably L-serine is added to the culture medium.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: April 8, 1997
    Assignee: Quest International B.V.
    Inventors: John Casey, Katherine A. Maume, Alfons L. J. Peters, Rudolf M. Veloo
  • Methylbutoxy-propionitriles and their use as perfumes
    Patent number: 5618784
    Abstract: Novel compounds, 3-(2-methylbut-1-oxy)- and 3-(3-methylbut-1-oxy)-2-methylpropionitrile, use of these compounds as fragrance materials, and perfumes containing these compounds.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: April 8, 1997
    Assignee: Quest International B.V.
    Inventor: Paul N. Davey
  • Production of (-)dodecahydro-3a,6,6,9a-tetramethyl-naphtho[2,1-b] furan
    Patent number: 5473085
    Abstract: Preparation of a methyl ketone intermediate useful in the synthesis of (-)-dodecahydro-3a,6,6, 9a-tetramethyl-naphtho(2,1-b) furan by subjecting (-)-sclareol to ozonolysis in the presence of iodine or iodine-containing compound. The intermediate can be converted to (-)-dodecahydro-3a,6,6,9a-tetramethyl-naphtho(2,1-b) furan by Baeyer-Villiger oxidation followed by reduction of the resulting product in the presence of a Lewis acid.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: December 5, 1995
    Assignee: Quest International B.V.
    Inventors: Derek H. R. Barton, Dennis K. Taylor, Chi-Lam Tse
  • Preparation of ambrox
    Patent number: 5463089
    Abstract: Synthesis of (-)-dodecahydro-3a,6,6,9a-tetramethyl-naphtho(2,1-b)furan from sclareol in a three-stage process.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: October 31, 1995
    Assignee: Quest International B.V.
    Inventors: Derek H. R. Barton, Shyamal I. Parekh, Dennis K. Taylor, Chi-lam Tse