Patents by Inventor Inge Bast

Inge Bast 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).

  • Deinking waste paper using a polyglycol and a phosphoric ester mixture
    Patent number: 5228953
    Abstract: A process for the recovery of fibers by means of flotation de-inking of waste paper which bears ink applied by flexographic printing or xerography, by reducing the paper to fibers in an aqueous medium with the addition of bleaching chemicals and auxiliaries containing peroxide, fatty acids, complexing agent, sodium hydroxide, and an additive based on polyglycol and a phosphoric ester mixture, produces fibers which are free from ink, which are useful as a recyclable material.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: July 20, 1993
    Assignee: BK Ladenburg GmbH Gesellschaft fur Chemische Erzeugnisse
    Inventors: Inge Bast, Margarete Scholl