Patents by Inventor August Gerl

August Gerl 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).

  • Water-repellent gypsum mortar
    Patent number: 4371399
    Abstract: A water-repellent gypsum mortar contains an agent conferring hydrophobic properties, which is composed of (a) a fatty amine of the formula ##STR1## in which R.sub.1 is C.sub.8 -C.sub.22 -alkyl, C.sub.8 -C.sub.22 -alkenyl or C.sub.8 -C.sub.22 -alkylphenyl, R.sub.2 and R.sub.3 are hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -alkenyl, C.sub.1 -C.sub.4 -alkoxy-C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -hydroxyalkyl, phenyl, benzyl or a group of the formula --(CH.sub.2 CH.sub.2 O).sub.n H and n is a number from 0 to 4,(b) a low-molecular acid and(c) an alkali metal siliconate.
    Type: Grant
    Filed: February 9, 1982
    Date of Patent: February 1, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Adolf May, Franz J. Voetz, August Gerl