Patents by Inventor Ivan Butula

Ivan Butula 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).

  • 4,5,6,7-Tetrahydrobenzimidazoles
    Patent number: 3987054
    Abstract: Corrosion inhibitors and preservatives of the following formula ##SPC1##WhereinR.sub.1 is hydrogen;R.sub.2 is selected from the group which consists of hydrogen, the diacetoxypropionic acid methyl ester and the diacetoxypropionic acid dialkylaminoethylamide with 1 to 4 carbon atoms in the alkyl group;R.sub.3 is hydrogen, unbranches or branched alkyl with 1 to 10 carbon atoms, carboxyl or alkoxycarbonyl wherein the alkoxy contains from 1 to 4 carbon atoms; andR.sub.4 is hydrogen, unbranched or branched alkyl with 1 to 4 carbon atoms; or acid addition or quaternary ammonium salts thereof.
    Type: Grant
    Filed: September 23, 1970
    Date of Patent: October 19, 1976
    Assignee: Pliva Pharmaceutical and Chemical Works
    Inventor: Ivan Butula