Patents by Inventor Willem Lenselink

Willem Lenselink 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).

  • 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
  • Novel chemical compounds and perfume compositions
    Publication number: 20020160931
    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: Application
    Filed: October 29, 2001
    Publication date: October 31, 2002
    Inventors: Willem Lenselink, Anton Pieter, J. van Manen
  • Fragrance composition of a cyclic ketone
    Publication number: 20020123437
    Abstract: The invention relates to a fragrance composition comprising a cyclic ketone. In particular such a composition provides a composition with improved substantivity, that can be used in various fragrance products. Furthermore the invention relates to employing such a composition in a range of processes, in which odor plays a role.
    Type: Application
    Filed: October 29, 2001
    Publication date: September 5, 2002
    Inventors: Frank Edward Conboy, 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
  • Tricyclo{6.2.1.0.sup.1,6 }undecanes useful as fragrance chemicals
    Patent number: 5015761
    Abstract: Novel tricycloundecanones are disclosed having the general formula ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are hydrogen or 1 to 3 carbon alkyl groups having a total carbon number of six or less. These compounds are useful perfumery ingredients characterized by odors of the woody type.Useful derivatives of the compounds are also disclosed as well as a novel procedure for preparation thereof.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: May 14, 1991
    Assignee: PFW(Nederland)B.V.
    Inventors: Willem Lenselink, Gerben Sipma
  • Nitriles useful in perfume
    Patent number: 5011970
    Abstract: Nitriles of the formula: ##STR1## wherein R is hydrogen or an alkyl radical of 1 to 6 carbon atoms and the dashed lines represent carbon-carbon single or double bonds.These compounds are useful in a variety of perfumery applications.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: April 30, 1991
    Assignee: PFW(Nederland)B.V.
    Inventor: Willem Lenselink
  • Nitriles and use as perfume chemicals
    Patent number: 4456561
    Abstract: Novel nitriles based on the carbon skeleton of menthane are disclosed, having the structural formula ##STR1## These compounds are useful in a variety of perfumery applications.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: June 26, 1984
    Assignee: Polak's Frutal Works, B.V.
    Inventor: Willem Lenselink
  • Menthene nitriles and use as perfume chemicals
    Patent number: 4336204
    Abstract: Novel nitriles based on the carbon skeleton of menthane are disclosed, having the structural formula ##STR1## These compounds are useful in a variety of perfumery applications.
    Type: Grant
    Filed: February 22, 1980
    Date of Patent: June 22, 1982
    Assignee: Polak's Frutal Works, B.V.
    Inventor: Willem Lenselink
  • Novel nitriles and use as perfume chemicals
    Patent number: 4235805
    Abstract: Novel nitriles based on the carbon skeleton of menthane are disclosed, having the structural formula These compounds are useful in a variety of perfumery applications.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: November 25, 1980
    Assignee: Polak's Frutal Works B.V.
    Inventor: Willem Lenselink
  • Carane nitriles
    Patent number: 4219449
    Abstract: Novel nitriles are disclosed based on the structure of 3,7,7-trimethylbicycloheptane. These compounds are disclosed and shown to be useful as ingredients in perfume compositions.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: August 26, 1980
    Assignee: Polak's Frutal Works B.V.
    Inventors: Willem Lenselink, Dirk K. Kettenes
  • Cyclic acetals and ketals and their use in perfume compositions
    Patent number: 4211674
    Abstract: Novel tricyclic 1,3-dioxanes based on the skeleton of 1,1-dimethyloctalin or 1,1-dimethyldecalin and their use as perfume components is disclosed.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: July 8, 1980
    Assignee: Polak's Frutal Works B.V.
    Inventor: Willem Lenselink