Patents by Inventor Walter Zepf

Walter Zepf 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).

  • Coating solution for metals and metal alloys
    Patent number: 7105472
    Abstract: The present invention relates to a coating solution to be applied on the surface of metals or metal alloys, a process for cold forming of metals and metal alloys using said coating solution, and a coated blank made of a metal or a metal alloy.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: September 12, 2006
    Inventor: Walter Zepf
  • Coating solution for metals and metal alloys
    Publication number: 20030216265
    Abstract: The present invention relates to a coating solution to be applied on the surface of metals or metal alloys, a process for cold forming of metals and metal alloys using said coating solution, and a coated blank made of a metal or a metal alloy.
    Type: Application
    Filed: April 4, 2003
    Publication date: November 20, 2003
    Inventor: Walter Zepf