Patents by Inventor Dieter Derdack

Dieter Derdack 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).

  • Sanitary mixing valve
    Patent number: 4685487
    Abstract: The present invention is directed to a sanitary mixing valve in which the valve housing is made of a ceramic material of unitary design and is interchangeable by being removably mounted to a connecting member having a cartridge valve assembly mounted thereto.
    Type: Grant
    Filed: March 18, 1986
    Date of Patent: August 11, 1987
    Assignee: American Standard Inc.
    Inventors: Dieter Derdack, Wilfried Delker