Patents by Inventor Friedrich Stoll

Friedrich Stoll 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).

  • Process and compositions for corrosion inhibition of metallic materials
    Patent number: 4859418
    Abstract: Use of the compounds of the formula ##STR1## in which R.sub.1 denotes C.sub.12 -C.sub.26 -alkyl or C.sub.12 -C.sub.26 alkenyl, n denotes a number from 0 to 5, K.sup.(+) denotes a group of the formulae ##STR2## or a group of the formula --(C.sub.2 H.sub.4 O).sub.x H, x denotes a number from 1 to 3, A.sup.(- denotes an anion, R.sub.9 denotes a group of the formula R.sub.1 '-(OCH.sub.2 CH.sub.2).sub.n --, C.sub.8 -C.sub.18 -alkylaryl or aryl-C.sub.8 -C.sub.18 -alkyl, R.sub.1 ' denotes C.sub.14 -C.sub.22 -alkyl or C.sub.14 -C.sub.22 -alkenyl, n denotes a number from 0 to 5 and the radicals R.sub.10 are identical and denote C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -hydroxyalkyl, as corrosion protection agents for metallic materials in aqueous media.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: August 22, 1989
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Dieter Ohlendorf, Werner Interthal, Friedrich Stoll