Patents by Inventor Karel Johannes Kriel

Karel Johannes Kriel 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 producing exo-tetrahydrodicyclopentadiene
    Patent number: 9567270
    Abstract: A process for isomerizing endo-hydrogenated dicyclopentadiene to form the corresponding exo-isomer using a stable, pumpable liquid aluminum halide catalyst which includes steps of providing a first solution containing a hydrogenated dicyclopentadiene compound that is dissolved in a hydrocarbon solvent, adding a cosolvent to the first solution to form a second solution, adding an aluminum halide to the second solution, and isomerizing the hydrogenated dicyclopentadiene compound in the presence of dissolved aluminum halide which acts as a catalyst to produce the corresponding exo-isomer.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: February 14, 2017
    Assignee: Johann Haltermann Limited
    Inventors: Indresh Mathur, Karel Johannes Kriel, Edward Hirohito Yonemoto