Patents by Inventor Alfred Huwiler

Alfred Huwiler 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).

  • Production of 2-(2-aminothiazole-4-yl)-2-(syn)-methoxyimino acetic esters
    Patent number: 4503234
    Abstract: Process for the production of 2-(2-aminothiazole-4-yl)-2-(syn)-methoxyimino acetic ester. First 4-chloroacetoacetic ester is oximized and then the resultant chlorohydroxyimino ester, in solution form, reacted with thiourea to produce 2-(2-aminothiazole-4-yl)-2-(syn)-hydroxyimino acetic ester. The latter is methylated with dimethyl sulfate using phase transfer catalysis.
    Type: Grant
    Filed: July 24, 1981
    Date of Patent: March 5, 1985
    Assignee: Lonza Ltd.
    Inventors: Alfred Huwiler, Leander Tenud
  • Process for the preparation of (2-amino-thiazol-4yl)-acetic acid hydrochloride
    Patent number: 4391979
    Abstract: Process for the simplified preparation of (2-aminothiazol-4-yl)-acetic acid hydrochloride in light-stable form, in high purity and in good yields, by the reaction of thiourea with 4-chloroacetoacetyl chloride.
    Type: Grant
    Filed: January 22, 1981
    Date of Patent: July 5, 1983
    Assignee: Lonza Ltd.
    Inventors: Alfred Huwiler, Leander Tenud