Patents by Inventor Wilhelmus J. Wiegers

Wilhelmus J. Wiegers 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).

  • Patent number: 4265836
    Abstract: A process is described for the preparation of cis-pent-2-enyl-1-chloride according to the reaction: ##STR1##
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: May 5, 1981
    Assignee: International Flavors & Fragrances Inc.
    Inventors: Wilhelmus J. Wiegers, John B. Hall
  • Patent number: 4265818
    Abstract: Processes and compositions are described for the use in foodstuff flavor and aroma and perfume and perfumed article aroma augmenting, modifying, altering and enhancing compositions and as foodstuff, chewing gum, toothpaste, medicinal product, perfume and perfumed article aroma imparting materials of certain indane alklanols and tricyclic isochromans defined according to the generic structure: ##STR1## wherein one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is C.sub.2 H.sub.5 and the remaining R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents methyl; wherein X is--CH.sub.2 --or hydrogen and wherein the dashed line represents a carbon-carbon single bond or no bond with the proviso that when X is--CH.sub.2 --, then the dashed line is a carbon-carbon single bond and when X is hydrogen, the dashed line represents no bond.Addition of said indane alkanols or said tricyclic isochromans or mixtures thereof is indicated to produce:A.
    Type: Grant
    Filed: August 3, 1979
    Date of Patent: May 5, 1981
    Assignee: International Flavors & Fragrances Inc.
    Inventors: Wilhelmus J. Wiegers, Mark A. Sprecker, Hugh Watkins, Manfred H. Vock, Frederick L. Schmitt
  • Patent number: 4250200
    Abstract: Processes and compositions are described for the use in foodstuff flavor and aroma and perfume and perfumed article aroma augmenting, modifying, altering, and enhancing compositions and as foodstuff, chewing gum, toothpaste, medicinal product, perfume and perfumed article aroma imparting materials of indane alkanols and tricyclic isochromans defined according to the generic structure: ##STR1## wherein R.sub.1 is hydrogen or methyl; R.sub.2, R.sub.3, R.sub.4 and R.sub.5 represent hydrogen, methyl or isopropyl; the dashed line represents a carbon-carbon single bond or no bond; X represents --CH.sub.2 --, CH.sub.3 or hydrogen; with the proviso (i) that R.sub.2 and R.sub.3 represent methyl when R.sub.4 is hydrogen and R.sub.5 is isopropyl and R.sub.4 and R.sub.5 represent methyl when R.sub.2 is hydrogen and R.sub.3 is isopropyl; and the dashed line represents a carbon-carbon single bond when X is --CH.sub.2 -- and the dashed line represents no bond when X is hydrogen or CH.sub.3.
    Type: Grant
    Filed: August 3, 1979
    Date of Patent: February 10, 1981
    Assignee: International Flavors & Fragrances Inc.
    Inventors: Wilhelmus J. Wiegers, Mark A. Sprecker, Hugh Watkins, Manfred H. Vock, Frederick L. Schmitt
  • Patent number: 4199481
    Abstract: A process is described for providing clear extended compositions of essential oils which comprises a composition of an essential oil and an extender material miscible with said essential oil which does not appreciably alter the aroma of the essential oil insofar as its quality or strength is concerned, the proportion of essential oil in extender material being from about 70% up to about 99%, said extender material being an acylated dimerization product of an alpha methyl styrene or a methyl or other C.sub.2 -C.sub.4 lower alkyl homologue thereof or hydrogenated derivative thereof or mixture of same.
    Type: Grant
    Filed: June 7, 1979
    Date of Patent: April 22, 1980
    Assignee: International Flavors & Fragrances Inc.
    Inventors: John B. Hall, Wilhelmus J. Wiegers, Ira D. Hill, Robert M. Novak, Frederick L. Schmitt
  • Patent number: 4170576
    Abstract: A process is described for providing clear extended compositions of essential oils which comprises a composition of an essential oil and an extender material miscible with said essential oil which does not appreciably alter the aroma of the essential oil insofar as its quality or strength is concerned, the proportion of essential oil in extender material being from about 70% up to about 99%, said extender material being a mixture of (A) a dimerization product of an alpha methyl styrene or a methyl or other C.sub.2 -C.sub.4 lower alkyl homologue thereof or mixture of same, and (B) one or more "dimerization" (or "coupling") products of one or more terpenes which are monocyclic and have two carbon-carbon double bonds or which are bicyclic and have one carbon-carbon double bond or one or more hydrogenated derivatives thereof or mixtures of same.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: October 9, 1979
    Assignee: International Flavors & Fragrances Inc.
    Inventors: John B. Hall, Wilhelmus J. Wiegers, Ira D. Hill, Robert M. Novak, Frederick L. Schmitt
  • Patent number: 4165301
    Abstract: A process is described for providing clear extended compositions of synthetic and/or natural essential oils and/or perfumery chemicals which comprises admixing a composition of a synthetic and/or natural essential oil and/or perfumery chemical and an extender material miscible with said synthetic and/or natural essential oil and/or perfumery chemical which does not appreciably alter the aroma of the synthetic and/or natural essential oil and/or perfumery chemical insofar as its quality or strength is concerned, the proportion of synthetic and/or natural essential oil and/or perfumery chemical in extender material being from about 70% up to about 99%, said extender material being one or more "dimerization" (or "coupling") products of one or more terpenes which are monocyclic and have two carbon-carbon double bonds or which are bicyclic and have one carbon-carbon double bond or one or more hydrogenated derivatives thereof or mixtures of same.
    Type: Grant
    Filed: May 3, 1978
    Date of Patent: August 21, 1979
    Assignee: International Flavors & Fragrances Inc.
    Inventors: Wilhelmus J. Wiegers, John B. Hall, Ira D. Hill, Robert M. Novak, Frederick L. Schmitt, Braja D. Mookherjee, Chi-Kuen Shu, William L. Schreiber
  • Patent number: 4142998
    Abstract: A process is described for providing clear extended compositions of essential oils which comprises a composition of an essential oil and an extender material miscible with said essential oil which does not appreciably alter the aroma of the essential oil insofar as its quality or strength is concerned, the proportion of essential oil in extender material being from about 70% up to about 99%, said extender material being a dimerization product of an alpha methyl styrene or a methyl or other C.sub.2 -C.sub.4 lower alkyl homologue thereof or hydrogenated derivative thereof or mixture of same, having one of the generic structures: ##STR1## wherein R.sub.3 and R.sub.4 are the same or different and each represents hydrogen or methyl or other C.sub.2 -C.sub.
    Type: Grant
    Filed: May 3, 1978
    Date of Patent: March 6, 1979
    Assignee: International Flavors & Fragrances Inc.
    Inventors: John B. Hall, Wilhelmus J. Wiegers, Ira D. Hill, Robert M. Novak, Frederick L. Schmitt
  • Patent number: 4131557
    Abstract: Described is a soap composition containing as a key ingredient, a mixture of compounds having a sandalwood aroma produced according to a process which comprises:(1) Reacting catechol with camphene in the presence of a Friedel Crafts Catalyst to form a first alkylation product; and then(2) Treating said first alkylation product with hydrogen in the presence of a hydrogenation catalyst, thus forming, initially, diol intermediates and then, on continuing the hydrogenation, the mixture useful in the perfume compositions of our invention.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: December 26, 1978
    Assignee: International Flavors & Fragrances Inc.
    Inventors: John B. Hall, Wilhelmus J. Wiegers