Patents by Inventor Hans J. Wild

Hans J. Wild 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).

  • Acetoacetic acid ester derivatives for the manufacture of .alpha.-hydroxycarbonyl compounds
    Patent number: 4892966
    Abstract: The invention is concerned with a novel process for the manufacture of compounds of the formula ##STR1## wherein R.sup.1 signifies C.sub.1-5 -alkyl, especially methyl, ethyl, propyl or isopropyl, and the radicals R.sup.2 each independently represent hydrogen or C.sub.1-5 -alkyl, especially hydrogen or methyl, ethyl, propyl or isopropyl.The process is characterized in that a compound of the formula ##STR2## wherein R stands for C.sub.1-4 -alkoxy, chlorine, bromine or C.sub.1-4 -alkanoyloxy, R.sup.1 and R.sup.2 have the above significance and R.sup.3 represents C.sub.1-4 -alkyl.is hydrolyzed and subjected to an aldol condensation and, where R=C.sub.1-4 -alkoxy, the reaction product is subsequently subjected to an acid treatment.The compounds I are for the most part known flavoring substances.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: January 9, 1990
    Assignee: Givaudan Corporation
    Inventor: Hans J. Wild
  • Cyano dihydro furanones
    Patent number: 4208338
    Abstract: This deals with a process for making furanones having the formula: ##STR1## wherein R represents a hydrogen atom or the methyl or ethyl group. These furanones are known flavoring substances.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: June 17, 1980
    Assignee: Givaudan Corporation
    Inventors: Ulrich Huber, Hans J. Wild
  • Process for making furanones
    Patent number: 4181666
    Abstract: This deals with a process for making furanones having the formula: ##STR1## wherein R represents a hydrogen atom or the methyl or ethyl group.
    Type: Grant
    Filed: July 26, 1978
    Date of Patent: January 1, 1980
    Assignee: Givaudan Corporation
    Inventors: Ulrich Huber, Hans J. Wild