Patents by Inventor Werner P. Fliege

Werner P. Fliege 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).

  • Process for deactivating soluble metal cations in iron oxide pigments
    Patent number: 4348240
    Abstract: The subject matter of this invention relates to a process for deactivating the soluble metal cations contained in iron oxide pigments comprising:A. adding, while oxidizing, an alkalizing compound to an iron oxide pigment, a slurry until the pH of the pigment slurry is greater than 9; andB. separating the iron oxide pigment from the liquid phase of the slurry.The pigments can be used as colorants for substances ingested by man and animals, and they can also be used to stabilize plastics against ultraviolet degradation.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: September 7, 1982
    Assignee: BASF Wyandotte Corporation
    Inventors: Arvind S. Patil, Siegfried P. Kersten, Werner P. Fliege