Patents by Inventor Dirk K. Kettenes

Dirk K. Kettenes 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).

  • Sulfur-containing flavoring agents
    Patent number: 4477678
    Abstract: Novel thioether compounds are disclosed which are useful as flavoring materials to enhance or impart meat-like flavors to foodstuffs. These compounds have the general formula ##STR1## where X can be, under specified conditions, --CH.sub.2 --, oxygen, or sulfur, Y can be oxygen or sulfur and R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are hydrogen or 1 to 3 carbon alkyl groups.
    Type: Grant
    Filed: January 4, 1983
    Date of Patent: October 16, 1984
    Assignee: P.F.W. Beheer B.V.
    Inventors: Steven van den Bosch, Dirk K. Kettenes, Kris B. de Ross, Gerben Sipma, Jan Stoffelsma
  • Novel sulfur-containing flavoring agents
    Patent number: 4380655
    Abstract: Novel thioether compounds are disclosed which are useful as flavoring materials to enhance or impart meat-like flavors to foodstuffs. These compounds have the general formula ##STR1## where X can be, under specified conditions, --CH.sub.2 --, oxygen, or sulfur, Y can be oxygen or sulfur and R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are hydrogen or 1 to 3 carbon alkyl groups.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: April 19, 1983
    Assignee: P.F.W. Beheer B.V.
    Inventors: Steven van den Bosch, Dirk K. Kettenes, Kris Bart de Roos, Gerben Sipma, Jan Stoffelsma
  • Perfume compositions containing dialkyl delta-lactones
    Patent number: 4288350
    Abstract: Certain dialkyl delta-lactones are disclosed to be useful as perfumery ingredients.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: September 8, 1981
    Assignee: Polak's Frutal Works B.V.
    Inventors: Kees N. Nieuwland, Dirk K. Kettenes
  • 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
  • 1-Crotonyl-2,2,6-trimethylcyclohexane
    Patent number: 4136066
    Abstract: 1-Crotonoyl-2,2,6-trimethylcyclohexane occurs in four stereoisomeric forms. In particular the trans, E and cis, E isomers having interesting organoleptic properties and are useful in the preparation of perfume compositions. Processes for preparing the stereoisomers, in a pure form or as mixtures, are described.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: January 23, 1979
    Assignee: P.F.W. Beheer B.V.
    Inventors: Douwe R. De Haan, Dirk K. Kettenes