Patents by Inventor Erna Kleiner

Erna Kleiner 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).

  • Coal suspension flowability improvers
    Patent number: 4652271
    Abstract: A composition for increasing the flowability of coal slurries having more than 60% coal solids content and a method for its use. The composition comprises at least one viscosity regulator, at least one maleic acid/acrylic acid copolymer of a specific viscosity range, and optionally, at least one polysaccharide.
    Type: Grant
    Filed: May 14, 1985
    Date of Patent: March 24, 1987
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Wolfgang von Rybinski, Erna Kleiner