Patents by Inventor Johann Waas

Johann Waas 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).

  • Patent number: 4072580
    Abstract: A water-miscible organic solvent is recovered from a mixture containing the solvent and water by adding an inert compound which is immiscible with the water and has a vapor pressure of no more than 5 mm Hg (abs.) at 100.degree. C. to the mixture and thereafter distilling off the organic solvent.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: February 7, 1978
    Assignee: Wacker-Chemie GmbH
    Inventors: Helmut Spork, Rudolf Strasser, Johann Waas
  • Patent number: 4032557
    Abstract: An improved process for preparing organosiloxanes and alkyl halides by passing organohalosilanes and alkanols having 1 and/or 2 carbon atoms through at least one layer of packing material which is maintained at a temperature of from 60.degree. to 150.degree. C, the improvement which comprises (1) recycling from 1 to 6 liters of an aqueous phase separated from the organosiloxanes emerging from the layer or layers of packing material for each mol of organohalosilane introduced into the layer or layers of packing material and (2) reacting the organosiloxane separated from the aqueous phase with from 2 to 10 percent by weight based on the weight of the organosiloxane with the same organohalosilane which is passed through the layer or layers of packing material.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: June 28, 1977
    Assignee: Wacker-Chemie GmbH
    Inventors: Helmut Spork, Rudolf Strasser, Rudolf Riedle, Wolfgang Jacques, Johann Waas