Patents Assigned to PFW Aroma Chemicals B.V.
  • Chemical compounds and perfume compositions
    Patent number: 6645932
    Abstract: The invention relates to new chemical compounds useful as perfumes or as components of perfumes. More specifically it relates to alkyl-substituted 2-acylindenes and isomeric mixtures thereof, as well as to perfume compositions comprising said compounds. Furthermore, the invention relates to the use of said compounds and methods of making said compounds.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: November 11, 2003
    Assignee: PFW Aroma Chemical B.V.
    Inventors: Willem Lenselink, Anton Pieter J. van Manen
  • Chemical compounds and perfume composition
    Patent number: 6319889
    Abstract: The invention is directed to novel compounds selected from the class of compounds having the structural formulae wherein the cyclohexane moiety with the dotted circle represents either a cyclohexane ring or a benzene ring, n represents an integer with the value 1, 3, or 4, m represents an integer with the value 1 or 2, R1, R2, R3, R4 and R5, represent hydrogen or a lower alkyl group, and the total carbon number of R1, R2, R3, R4 and R5, combined is eight or less.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: November 20, 2001
    Assignee: PFW Aroma Chemicals B.V.
    Inventors: Willem Lenselink, Anton Pieter Johan van Manen
  • Mixtures of acetylpolyalkylindanes and acetylpolyalkyltetralines
    Patent number: 5362715
    Abstract: The invention is directed to a mixture of acetylpolyalkylindanes and acetylpolyalkyltetralines obtainable by cycloalkylation of p-cymene and/or p,.alpha.-dimethylstyrene and/or 8-p-cymenyl halides and/or 8-p-cymenyl alcohol with a mixture of alkenes consisting of one or more methylbutene isomers and one or more dimethylbutene isomers, followed by acetylation of the intermediate mixture of polyalkylindanes and polyalkyltetralines.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: November 8, 1994
    Assignee: PFW Aroma Chemicals B.V.
    Inventors: Amnon M. Cohen, Frank E. Conboy, Willem Lenselink, Everardus A. Oostveen