Patents by Inventor Hans Erdmann

Hans Erdmann 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).

  • Complex basic zirconium salts and aluminum salts
    Patent number: 4049379
    Abstract: New complex salts with zirconium and aluminum as central atoms and oxo, hydroxy, organic acido and sulfato groups as ligands, and a process for tanning skins and hides with these complex salts as tanning materials.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: September 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Erdmann, Franz-Friedrich Miller
  • Brake system for automotive vehicle equipped with Otto engines
    Patent number: 4024709
    Abstract: This invention discloses a brake system for use in automotive vehicles having Otto engines which includes a vacuum operated brake booster and a vacuum pump for generating the necessary vacuum for effective operation of the brake booster. A vacuum pump is positioned between and connected to the vacuum brake booster and the inlet manifold or carburetor induction pipe of an Otto engine. Means are provided for automatically switching the vacuum pump on if there is an insufficient amount of vacuum in the brake booster and also at the same time there is a predetermined amount of vacuum in the intake manifold.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: May 24, 1977
    Assignee: ITT Industries, Inc.
    Inventor: Hans Erdmann