Patents by Inventor Andre Troesch

Andre Troesch 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 cleaning used oils
    Patent number: 3954602
    Abstract: A process for cleaning a used oil, in particular engine oil and industrial lubricating oil. The process comprises heat treating the used oil in a heat treatment zone at a temperature of 325.degree.-400.degree.C at a pressure of 1-6 bars for a period of at least 15 minutes, continuously withdrawing a first part of the treated oil from the heat treatment zone, re-heating said first part of the oil and recycling the re-heated first part of the oil through the heat treatment zone, subjecting the remainder of the heat treated oil from the heat treatment zone to a treatment for separating out the sedimentary residues from the heat treated oil. The sedimentary residues are incinerated in the re-heating furnace for re-heating said first part. A system is described for carrying out the process.
    Type: Grant
    Filed: February 20, 1974
    Date of Patent: May 4, 1976
    Assignee: Societe Parisienne des Lubrifiants Nationaux et des Entrepots d'Hydrocarbures
    Inventors: Andre Troesch, Fernand Cleron