Patents by Inventor Johannes J. Janssen

Johannes J. Janssen 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 treatment of a wastewater
    Patent number: 5558778
    Abstract: A process for the treatment of a wastewater feed originating from a styrene/propylene oxide production plant and containing hydrocarbons, aldehydes, ketones, alcohols, phenols and salts, by freeze-concentration combined with salt crystals removal, thereby separating the wastewater feed into an at least two-fold concentrated waste product, salt crystals, and a substantially pure water product.
    Type: Grant
    Filed: September 14, 1995
    Date of Patent: September 24, 1996
    Assignee: Shell Oil Company
    Inventors: Johannes J. Janssen, Arie L. Mos, Theodoor J. L. W. Simons