Patents by Inventor Bernhard Scherhag

Bernhard Scherhag 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 isolation of diaryl guanidines
    Patent number: 4739117
    Abstract: Diaryl guanidines can be obtained in a high degree of purity and in high yields from the crude melt obtained from the reaction of arylamines and cyanogen chloride by dissolving the hot melt in water, extracting this solution with a mixture of at least one water insoluble, apolar hydrocarbon and at least one polar organic compound and precipitating the diaryl guanidine from the purified, aqueous solution by the addition of alkali metal hydroxide.
    Type: Grant
    Filed: December 16, 1986
    Date of Patent: April 19, 1988
    Assignee: Bayer Aktiengesellschaft
    Inventors: Alfred Nierth, Bernhard Scherhag, Reinhard Preuss, Heinz Klose, Salvatore Sabia
  • Desulfurization of waste gases containing hydrogen sulfide
    Patent number: 4056606
    Abstract: Hydrogen sulfide in a gas is converted to sulfur by treatment with sulfur dioxide in the presence of a buffered organic polybasic acid with conversion of excess sulfur compounds in the gas to sulfur dioxide for recycle to the conversion.
    Type: Grant
    Filed: May 25, 1976
    Date of Patent: November 1, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rolf Germerdonk, Adam Jonas, Dieter Hullstrung, Bernhard Scherhag