Patents by Inventor Walter Kleinert

Walter Kleinert 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 the production of a free flowing filled elastomer powder
    Patent number: 4835196
    Abstract: A process for the production of a free flowing filled elastomer powder by combining an elastomer latex with a filler suspension is disclosed wherein the combining of elastomer latex and filler suspension takes place in the presence of about 0.1-15 parts by weight--calculated per 100 parts by weight of elastomer solid in the elastomer latex--of a high-molecular-weight amine with quaternary nitrogen functions and with an average molecular weight of about 10.sup.4 to 10.sup.8.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: May 30, 1989
    Assignee: Huels Aktiengesellschaft
    Inventors: Michael Mueller, Walter Kleinert
  • Process for the production of free-flowing rubber powders with silicic acid as filler
    Patent number: 4771092
    Abstract: A process for the production of free-flowing rubber powders with silicic acid as filler comprises combining a rubber latex with silicic acid filler while stirring in the presence of specific auxiliary agents, adjusting the pH range of the mixture to cause coagulation, and separating and drying the resultant solids wherein the specific auxiliary agents comprise organic surfactants together with colloidal silicic acid.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: September 13, 1988
    Assignee: Huels Aktiengesellschaft
    Inventors: Reiner Ollenik, Walter Kleinert, Michael F. Mueller