Patents by Inventor Hans-Athanas Bruhn

Hans-Athanas Bruhn 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 for production of 2-cyanoacrylates from 2,4-dicyanoglutarates
    Patent number: 4587059
    Abstract: A process for preparing monomeric 2-cyanoacrylates by reacting a dicyanoglutarate with formaldehyde in the presence of water and under acid pH conditions, then removing the water and thermolyzing the intermediate reaction product.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: May 6, 1986
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Hubert Harth, Willi Wuest, Hans-Athanas Bruhn, Miklos Danielisz, Erbo Heinrich
  • Cyanacrylic acid ester based glues with a content of a diester of a polyoxyalkylene glycol
    Patent number: 4421909
    Abstract: Cyanacrylic acid ester based glues with a reduced setting time comprising a cyanacrylic acid ester and from 0.005% to 3% by weight, based on the cyanacrylic acid ester of a polyoxyalkylene glycol diester having the formula ##STR1## wherein x is an integer from 5 to 80, Alk is an alkylene having from 2 to 4 carbon atoms, and R.sub.1 and R.sub.2 represent members selected from the group consisting of hydroxyl, halogen, lower alkoxy, alkoxyalkyl having from 3 to 12 carbon atoms, alkyl having from 1 to 12 carbon atoms, cyanoalkyl having from 1 to 12 carbon atoms, haloalkyl having from 1 to 12 carbon atoms, nitroalkyl having from 1 to 12 carbon atoms, alkenyl having from 2 to 12 carbon atoms, alkynyl having from 2 to 12 carbon atoms, cycloalkyl having from 3 to 12 carbon atoms, phenyl, nitrophenyl, halophenyl, phenylalkyl having from 1 to 6 carbon atoms in the alkyl and alkylphenyl having from 1 to 6 carbon atoms in the alkyl.
    Type: Grant
    Filed: December 27, 1982
    Date of Patent: December 20, 1983
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Werner Gruber, Hans-Athanas Bruhn
  • Cyanacrylic acid ester based glues with a content of a diester of a polyoxyalkylene glycol
    Patent number: 4378457
    Abstract: Cyanacrylic acid ester based glues with a reduced setting time comprising a cyanacrylic acid ester and from 0.005% to 3% by weight, based on the cyanacrylic acid ester of a polyoxyalkylene glycol diester having the formula ##STR1## wherein x is an integer from 5 to 80, Alk is an alkylene having from 2 to 4 carbon atoms, and R.sub.1 and R.sub.2 represent members selected from the group consisting of hydroxyl, halogen, lower alkoxy, alkoxyalkyl having from 3 to 12 carbon atoms, alkyl having from 1 to 12 carbon atoms, cyanoalkyl having from 1 to 12 carbon atoms, haloalkyl having from 1 to 12 carbon atoms, nitroalkyl having from 1 to 12 carbon atoms, alkenyl having from 2 to 12 carbon atoms, alkynyl having from 2 to 12 carbon atoms, cycloalkyl having from 3 to 12 carbon atoms, phenyl, nitrophenyl, halophenyl, phenylalkyl having from 1 to 6 carbon atoms in the alkyl and alkylphenyl having from 1 to 6 carbon atoms in the alkyl.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: March 29, 1983
    Assignee: Henkel Kommanditgesellschaft Auf Aktien
    Inventors: Werner Gruber, Hans-Athanas Bruhn