Patents by Inventor Gerhard Rohrbach

Gerhard Rohrbach 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 carbonization of oil shale and other carbonizable materials
    Patent number: 4326471
    Abstract: A process for the carbonization of oil shale and/or other carbonizable materials, including a process line serving for carbonization, with a closed cycle and without condensate recovery, wherein the materials flowing through the process line are heated to the carbonization temperature through heat exchange. Coming into consideration as further carbonizable materials are fuels which are high in inerts such as, for example, bituminous rock, oil-containing fuller's earth, high-ash coal, oil sands, refuse and the like.
    Type: Grant
    Filed: July 11, 1980
    Date of Patent: April 27, 1982
    Assignee: Portlandzementwerk Dotternhausen Rudolf Rohrbach Kommanditgellschaft
    Inventors: Gerhard Rohrbach, Bernd Hollman
  • Process for producing cement clinker
    Patent number: 4110121
    Abstract: To produce cement clinker, particulate material such as limestone, clay, iron oxide and sand is fed to a heat exchanger in which it is heated by heat supplied from a furnace. The heated material is conveyed to the furnace and sintered therein to form the cement clinker. Fuel formed from organic waste, for example motor vehicle tires, is used as the fuel.
    Type: Grant
    Filed: June 8, 1977
    Date of Patent: August 29, 1978
    Assignee: Portlandzementwerk Dotternhausen Rudolf Rohbach Kommanditgesellschaft
    Inventors: Helmuth Rechmeier, Gerhard Rohrbach
  • Process for the heat treatment of material in dust form
    Patent number: 3973980
    Abstract: A process for the heat treatment of material in dust form in a rotary kiln installation having a condenser connected on the output side of the rotary kiln. One or more heat exchangers are connected on the input side of the kiln.
    Type: Grant
    Filed: December 18, 1973
    Date of Patent: August 10, 1976
    Assignee: Rudolf Rohrbach
    Inventors: Rudolf Rohrbach, Gerhard Rohrbach, Helmuth Y. Rechmeier