Patents by Inventor Walter Geistert

Walter Geistert 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
  • Process for optimal pressure control in a multi-stage evaporation unit
    Patent number: 4032412
    Abstract: A system for optimal pressure control in a multistage evaporation unit comprising two or more series connected evaporation stages with at least one of the stages preceded by a heat source, where the fresh or feed solution is passed through heat exchangers in which it is heated by means of the vapors from the subsequent evaporation stages, and where a heat exchanger adapted to permit free flow of the vapor condensate through the heat exchanger inner portion or tube portion is arranged in the line through which the vapor leaves the higher-pressure evaporation stage.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: June 28, 1977
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Alfred Hoppe, Walter Geistert