Patents by Inventor Dale R. Hoff

Dale R. Hoff 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).

  • Substituted benzoylacrylanilides
    Patent number: 4130661
    Abstract: Novel substituted benzoylacrylanilides are prepared by reacting a substituted benzoylacrylic acid with a substituted aniline in the presence of a coupling agent. These acrylanilides have significant anticoccidial activity.
    Type: Grant
    Filed: June 30, 1977
    Date of Patent: December 19, 1978
    Assignee: Merck & Co., Inc.
    Inventors: Peter Kulsa, Dale R. Hoff, Helmut H. Mrozik
  • Stabilized oxadiazole anthelmintic compositions
    Patent number: 4067987
    Abstract: Anthelmintically active 3-loweralkyl-1,2,4-oxadiazoles are stabilized by the formation of homogeneous mixtures thereof with water and with certain alcohols, the molar ratio of stabilizer to oxadiazole being adjusted to within 0.1:1 to 2:1 to achieve required stability.
    Type: Grant
    Filed: January 9, 1976
    Date of Patent: January 10, 1978
    Assignee: Merck & Co., Inc.
    Inventors: Michael H. Fisher, George B. Smith, Dale R. Hoff
  • 4-Nitro-5-cyanoimidazoles as coccidiostats
    Patent number: 3968228
    Abstract: 4-Nitro-5-cyanoimidazoles substituted with a 1-loweralkyl group and variously substituted at the 2-position are useful as antiparasitic agents particularly as coccidiostats. The 4-nitro-5-cyanoimidazole coccidiostats are included in compositions useful for administration to poultry as treatment for coccidiosis.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: July 6, 1976
    Assignee: Merck & Co., Inc.
    Inventors: Dale R. Hoff, Peter Kulsa, Helmut H. Mrozik, Edward F. Rogers