Patents by Inventor Hans-G unter Fr ohlen

Hans-G unter Fr ohlen 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 recovery of tributyl phosphate from spent hydraulic oils
    Patent number: 5608099
    Abstract: A process for the recovery by distillation of tributyl phosphate (TBPO) from spent hydraulic oils, which are employed particularly in aircraft used for civilian air traffic.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: March 4, 1997
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-G unter Fr ohlen, Hans-Dieter Block, Wolfgang Ohlendorf, Hans-Heinrich Moretto, Peter Schmidt