Patents by Inventor Ingrid Ressler

Ingrid Ressler 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).

  • Temperature-stable pigment-colored plastic compositions, process for producing them and means for conducting the process
    Patent number: 5207828
    Abstract: Plastics are described which contain, in intimate contact with the pigments, boric acid in a quantity of 1 to 20% by weight, preferably 2 to 15% by weight, of the dry pigment. Also described is the process for producing said plastics, in which the usual plastic granules or powders are mixed with the above-mentioned quantities of boric acid before, during or after addition of the pigment, and the boric acid is brought into intimate contact with the pigment before further processing, of the particulate plastic is mixed with the pigment containing the above mentioned quantities of boric acid before being subjected to further processing under thermal stress.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: May 4, 1993
    Assignee: Dr. Hans Heubach GmbH & Co KG
    Inventors: Ingrid Ressler, Gerhard Adrian, Walter Horn, Donald Gray