Patents by Inventor Enno Todt, deceased

Enno Todt, deceased 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).

  • Method for the preparation of additives in organo-aluminum electrolyte media
    Patent number: 4144140
    Abstract: The invention concerns a method for the preparation of additives for influencing the electrocrystalline growth in aprotic oxygen- and water-free organo-aluminum electrolyte media. A compound which contains a sulfonimide or sulfonamide group as the reactable group, preferably, N-benzoylbenzenesulfonimide, optionally in the presence of an inert organic solvent, is reacted with at least one organoaluminum compound of the general formula AlR.sub.3, where R is an alkyl radical, in the ratio of 1:1 to 1:6.The additives obtained furnish a bright aluminum coating on metals and conductive materials in direct electrodeposition.
    Type: Grant
    Filed: January 27, 1978
    Date of Patent: March 13, 1979
    Assignee: Siemens Aktiengesellschaft
    Inventors: Richard Dotzer, Hans-George Hauschildt, Enno Todt, deceased
  • Method for the preparation of additives in organo-aluminum electrolyte media
    Patent number: 4071526
    Abstract: The invention concerns a method for the preparation of additives for influencing the electrocrystalline growth in aprotic oxygen- and water-free organo-aluminum electrolyte media. A compound which contains a sulfonimide or sulfonamide group as the reactable group, preferably, N-benzoylbenzenesulfonimide, optionally in the presence of an inert organic solvent, is reacted with at least one organoaluminum compound of the general formula AlR.sub.3, where R is an alkyl radical, in the ratio of 1:1 to 1:6.The additives obtained furnish a bright aluminum coating on metals and conductive materials in direct electrodeposition.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: January 31, 1978
    Assignee: Siemens Aktiengesellschaft
    Inventors: Richard Dotzer, Hans-Georg Hauschildt, Enno Todt, deceased, by Susanne Todt, heir, by Ruth Katharina Todt, heir, Ernst Josef Todt, heir
  • Electroplating bath and method for the electrodeposition of bright aluminum coatings
    Patent number: 4032413
    Abstract: The invention provides an electroplating bath and a method for the electrodeposition of bright aluminum coatings on metals and conductive materials with aprotic oxygen- and water-free, organo-aluminum electrolytes which contain as a brightener at least one additive with at least one sulfonamide, sulfonimide and/or carbimide group. Particularly suitable brighteners are o-benzoic acid sulfonimide, N-benzoylbenzenesulfonamide and the reaction products of o-benzoic acid sulfonimide or N-benzoylbenzenesulfonamide with aluminum triethyl.Using the method, a fast-adhering and corrosion-resistant bright aluminum coating is obtained which finds use for decorative purposes and, generally, for corrosion protection in surface finishing, e.g., also as mirrors and reflectors for light and heat radiators.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: June 28, 1977
    Assignee: Siemens Aktiengesellschaft
    Inventors: Richard Dotzer, Hans-Georg Hauschildt, Enno Todt, deceased, by Susanne Todt, legal heir, by Ruth Katharina Todt, legal heir