Patents by Inventor Lutz Schellenberg

Lutz Schellenberg 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).

  • Anticorrosive agents and use thereof
    Patent number: 4956016
    Abstract: Corrosion inhibitors containing a mixture of one or more water soluble tetraborate salts and one or more water soluble condensed phosphate salts are non-toxic and are more effective than either of the components alone. These compositions containing both tetraborates and condensed phosphates are also more effective than such prior art inhibitors as nitrites and ethanolamine-based inhibitors.
    Type: Grant
    Filed: February 28, 1989
    Date of Patent: September 11, 1990
    Assignee: Gerhard Collardin GmbH
    Inventors: Reinhard Opitz, Lutz Schellenberg
  • Electrolyte stabilization of latices
    Patent number: 4639319
    Abstract: A method for stabilizing the electrolyte content of latex composition baths in which, preferably, the bath is flowingly contacted with the outside of a tubular filtration membrane having pores smaller than the latex micelles, and partly deioized water flows through the center of the tubular membrane at a rate sufficient to cause a pressure differential and thus effect ultrafiltration removal of electrolytes.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: January 27, 1987
    Assignee: Gerhard Collardin GmbH
    Inventors: Lutz Schellenberg, Matthias Hamacher, Bashir M. Ahmed
  • Autodeposition post-bath rinse process
    Patent number: 4636264
    Abstract: A process for increasing the anticorrosive properties of an autodeposited coating wherein after the bath but before the curing, metallic chromate salts are formed in situ by first rinsing with metallic non-chromate water soluble salts and then rinsing with a chromium compound.
    Type: Grant
    Filed: November 26, 1985
    Date of Patent: January 13, 1987
    Assignee: Gerhard Collardin GmbH
    Inventors: Lutz Schellenberg, Matthias Hamacher, Ronald Broadbent