Patents by Inventor Martina Claus

Martina Claus 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 preparation of alkali metal cyanide granulates
    Patent number: 5914075
    Abstract: New alkali metal cyanide granulates based on sodium cyanide or potassium cyanide and a method for their preparation are disclosed. Commercially available alkali metal cyanide granulates consist of irregular particles; disadvantages are in particular the tendencies to form dust and to cake. The disclosed alkali metal cyanide granulates demonstrate a reduced tendency to cake and virtually no abrasion. The granulates are characterized by essentially spherical particles with particle diameters in the range 0.1 to 20 mm, a bulk density of more than 600 g/dm.sup.3, an abrasion of less than 1%, and a caking index of at most 4. The granulates can be prepared by fluidized bed spray granulation involving spraying an aqueous solution containing alkali metal cyanide onto alkali metal cyanide nuclei in a fluidized bed and evaporating the water.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: June 22, 1999
    Assignee: Degussa Aktiengesellschaft
    Inventors: Herbert Riemenschneider, Christian Alt, Martina Claus, Juergen Loroesch, Josef Leutner, Heinz Moench, Ruediger Schuette, Stefan Schulze
  • Granulated alkali metal cyanide
    Patent number: 5674617
    Abstract: New alkali metal cyanide granulates based on sodium cyanide or potassium cyanide and a method for their preparation are disclosed. Commercially available alkali metal cyanide granulates consist of irregular particles; disadvantages are in particular the tendencies to form dust and to cake. The disclosed alkali metal cyanide granulates demonstrate a reduced tendency to cake and virtually no abrasion. The granulates are characterized by essentially spherical particles with particle diameters in the range 0.1 to 20 mm, a bulk density of more than 600 g/dm.sup.3, an abrasion of less than 1%, and a caking index of at most 4. The granulates can be prepared by fluidized bed spray granulation involving spraying an aqueous solution containing alkali metal cyanide onto alkali metal cyanide nuclei in a fluidized bed and evaporating the water.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: October 7, 1997
    Assignee: Degussa Aktiengesellschaft
    Inventors: Herbert Riemenschneider, Christian Alt, Martina Claus, Jurgen Lorosch, Josef Leutner, Heinz Monch