Patents by Inventor Werner Gerhardt

Werner Gerhardt 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).

  • Patent number: 4652585
    Abstract: Compounds which are the reaction products of a C.sub.12-14 -alkyl N-substituted 1,3-diaminopropane and glutamic acid or its 5-methyl ester, optionally alkoxylated, and optionally their salts, are useful as antimicrobial agents.
    Type: Grant
    Filed: March 15, 1985
    Date of Patent: March 24, 1987
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Werner Gerhardt, Herbert Fischer, Rudolf Lehmann, Karlheinz Disch, Hans T. Leinen
  • Patent number: 4474807
    Abstract: This invention is directed to novel antimicrobial agents. More particularly, this invention is directed to 2-(3-iodo-2-propynyloxy)-ethyl carbamates of the formula ##STR1## wherein R is hydrogen, linear or branched alkyl of from 1 to 12 carbon atoms, cycloalkyl of from 4 to 8 carbon atoms, aryl, substituted aryl, aralkyl, or arylsulfonyl;R.sup.1 and R.sup.2, which may be the same or different, each are hydrogen, linear or branched alkyl or alkenyl of from 1 to 6 carbon atoms, or cycloalkyl of from 5 to 7 carbon atoms, or R.sup.1 and R.sup.2, taken together, represent --(CH.sub.2).sub.m --, in which m is an integer of from 4 to 6; andR.sup.3, R.sup.4, R.sup.5, and R.sup.6, which may be the same or different, each represent hydrogen, alkyl of from 1 to 4 carbon atoms, or aryl, or CCl.sub.3, or R.sup.3 and R.sup.5 or R.sup.4 and R.sup.6, taken together, represent --(CH.sub.2).sub.n --, in which n is an integer of from 3 to 5,as well as a process for their preparation and their use as antimicrobial agents.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: October 2, 1984
    Assignees: Henkel Kommandigesellschaft auf Aktien, Montedison S.p.A.
    Inventors: Werner Gerhardt, Rudolf Lehmann
  • Patent number: 4298568
    Abstract: A method for inhibiting corrosion of nonferrous metals in contact with circulating water comprising the steps of adding to circulating water in contact with non-ferrrous metals from 0.05 to 10 gm/m.sup.3 of at least one 3-amino-5-alkyl-1,2,4-triazole wherein said alkyl has from 2 to 8 carbon atoms and adjusting said water to a pH of from 6 to 10; as well as corrosion inhibiting compositions containing said 3-amino-5-alkyl-1,2,4-triazole.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: November 3, 1981
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Werner Gerhardt, Volker Wehle, Andreas Syldatk, Gabriele Rogall, Jurgen Reiffert, Jens Conrad
  • Patent number: D372791
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: August 20, 1996
    Assignee: H. von Gimborn GmbH
    Inventors: Paul Berendsen, Hans-Kervin Bruins, Werner Gerhardt