Patents by Inventor Erich-Klaus Martin

Erich-Klaus Martin 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).

  • Method of cleaning and regenerating used oils
    Patent number: 5141628
    Abstract: Used oils, especially used lube oils, after rough filtering are mixed with an aqueous solution of water glass and an aqueous solution of polyalkylene glycol while stirring at elevated temperature, the obtained mixture is allowed to settle, the settlings are separated, and water and light ends are removed from the oil phase by distillation. The thus obtained dry oil phase may be subjected to adsorptive filtering either direct or through a per se known treatment with dispersed sodium and may finally be fractionated by distillation.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: August 25, 1992
    Assignee: RWE-Entsorgung Aktiengesellschaft
    Inventors: Erich-Klaus Martin, Adekunle Onabajo