Patents by Inventor Willi Fischer

Willi Fischer 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: 4517057
    Abstract: In a method and apparatus for short-path, high-vacuum distillation from a liquid on plate-like evaporating surfaces from which distillable fractions evaporate and precipitate onto condensation surfaces a short distance away, the liquid is placed upon the evaporating surfaces at a temperature such that the energy required for its evaporation is taken, at least in part, from the still-unevaporated fraction of the liquid.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: May 14, 1985
    Assignee: Leybold-Heraeus GmbH
    Inventors: Friedrich Fauser, Willi Fischer
  • Patent number: 4366049
    Abstract: The object of the invention is a process for recycling used lubricating oils. After drying and gasoline removal, the oil is distilled and then treated with sodium or sodium hydride in a finely-divided state at elevated temperature. This is followed by a further distillation. Both distillations are at temperatures below 300.degree. C., the oil fractions of low volatility being respectively distilled in a molecular distillation apparatus at below 2 mbar.
    Type: Grant
    Filed: September 30, 1980
    Date of Patent: December 28, 1982
    Assignees: Leybold-Heraeus GmbH, Degussa Aktiengesellschaft
    Inventors: Helmut Knorre, Manfred Langer, Friedrich Fauser, Willi Fischer