Patents by Inventor Max Kunert

Max Kunert 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).

  • Purification of aqueous urea solutions in a urea dewaxing process
    Patent number: 3954598
    Abstract: Dilute aqueous urea solutions, contaminated with oil-solvent solution and obtained as filtrate or centrifugate in a urea dewaxing process of the type where a concentrated aqueous solution of urea is employed to form the wax-urea adduct, are purified by admixing the contaminated dilute aqueous urea solution with 1-25, preferably 2-5 volumes of solvent per volume of oil-solvent solution contamination, filtering the mixture, settling the mixture into two liquid phases, a substantially uncontaminated aqueous urea solution and an oil-solvent solution, and separating the two phases.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: May 4, 1976
    Assignee: Edeleanu Gesellschaft m.b.H.
    Inventors: Hermann Franz, Max Kunert