Patents by Inventor Frank Koebert

Frank Koebert 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).

  • Patent number: 4009136
    Abstract: A process for preparing a multicolor coating composition where (a) a polymeric material is dissolved in an organic solvent to form a viscous solution, (b) the viscous solution is mixed with an oil-based pigment grind, (c) the viscosity of the mix is increased by addition of an aqueous polymer latex to the mix, (d) addition of the resulting mixture to an aqueous latex-based paint with agitation produces a coarse dispersion of the pigmented latex modified polymer solution in the latex-based paint. The composition created by this process is suitable for application to solid surfaces by brushing, rolling or spraying. A spotted color effect is created as the pigmented globules created by the process are not broken by the shearing action of brushing or rolling.
    Type: Grant
    Filed: June 5, 1974
    Date of Patent: February 22, 1977
    Assignee: Rohm and Haas Company
    Inventors: Edward W. Lewandowski, Frank Koebert