Patents by Inventor Franz-Josef Rottstegge

Franz-Josef Rottstegge 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).

  • Ascension pipe closure for coke oven batteries
    Patent number: 4168208
    Abstract: An elbow cover for a coke oven ascension pipe characterized in that the opening which is covered is oval in shape and is formed at the junction of the ascension pipe and a downwardly-extending supply pipe leading to a gas-collecting main. The oval-shaped cover is provided with an immersion cup seal and a spaced sealing plate. Because of the oval shape of the opening, cleaning tools can be readily inserted into the opening to clean both the ascension pipe as well as the supply pipe.
    Type: Grant
    Filed: September 29, 1977
    Date of Patent: September 18, 1979
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Ludger Althoff, Theo Koddenberg, Franz-Josef Rottstegge