Patents Assigned to Grissman Chemicals Limited
  • Product and method for combating swine dysentery
    Patent number: 4292318
    Abstract: A substituted pyrazine having the formula ##STR1## is useful for treating and preventing swine dysentery. It may be administered to swine in an effective but non-toxic amount in the form of the drug per se, or a feed composition. Such feeds may be made with the aid of premixes containing the said compound.
    Type: Grant
    Filed: June 6, 1980
    Date of Patent: September 29, 1981
    Assignee: Grissman Chemicals Limited
    Inventor: Eugen Diethelm
  • Process for preparing pyrenzepine
    Patent number: 4277399
    Abstract: Pyrenzepine, as such or as an acid addition salt, is made by reacting a lower alkyl ester of o-aminobenzoic acid with 3-aminopyridine in the presence of a base and reacting the tricyclic product with a mixed anhydride of methyl-piperazine acetic acid.
    Type: Grant
    Filed: June 6, 1980
    Date of Patent: July 7, 1981
    Assignee: Grissman Chemicals Limited
    Inventor: Eugen Diethelm
  • (1-Alkyl-5-nitro-2-imidazolyl)-vinyl-glyoxal-diacetals, their preparation and their use
    Patent number: 4273783
    Abstract: (1-Alkyl-5-nitro-imidazolyl)-vinyl-glyoxal-diacetals of the formula: ##STR1## in which R and R' are each alkyl of 1 to 5 carbon atoms, are useful in the treatment of infections caused by protozoa, mycetes, and bacteria.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: June 16, 1981
    Assignee: Grissman Chemicals Limited
    Inventor: Eugen Diethelm