Patents by Inventor Gottfried Klippel

Gottfried Klippel 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 production of a transformer oil
    Patent number: 4303499
    Abstract: A process is provided for the production of a stable, age-resisting mineral oil composition which comprises subjecting a paraffin base mineral crude oil to distillation to produce a distillate fraction boiling in the range of 270.degree. to 400.degree. C., solvent dewaxing said distillate fraction, solvent extracting said dewaxed distillate portion to produce a solvate fraction and an extract fraction, refining said solvate fraction, concentrating and refining said extract fraction and adding said refined, concentrated extract portion with said refined solvate fraction.
    Type: Grant
    Filed: February 9, 1979
    Date of Patent: December 1, 1981
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Walter Geistert, Ulrich Kramer, Gottfried Klippel