Patents by Inventor Hermann Raveling

Hermann Raveling 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).

  • Nitrification-inhibiting agent and process for the production thereof
    Patent number: 4626270
    Abstract: The present invention provides an agent for inhibiting the nitrification of nitrogen-containing fertilizers based on dicyandiamide, which comprises 1 to 40% by weight of a fertilizer which is readily soluble in water and/or ammonia.The present invention also provides a process for the production of this agent, wherein finely particulate dicyandiamide is sprayed with an aqueous solution of a fertilizer which is readily soluble in water and/or ammonia and subsequently dried.
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: December 2, 1986
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Horst Michaud, Hermann Raveling, Joachim von Seyerl
  • Process for the modification of the crystal form of dicyandiamide
    Patent number: 4560796
    Abstract: The present invention provides a process for the modification of the crystal form of dicyandiamide, wherein dicyandiamide is crystallized from aqueous solution in the presence of 0.001 to 10% by weight of polyvinyl alcohol and/or of a water-soluble cellulose ether derivative, referred to the amount of dicyandiamide. The crystalline dicyandiamide obtained in this manner has outstanding flow and storage properties and its mechanical strength is substantially improved.
    Type: Grant
    Filed: November 1, 1983
    Date of Patent: December 24, 1985
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Gerhard Smutek, Hermann Raveling
  • Stabilized fertilizer solutions
    Patent number: 4475939
    Abstract: The present invention provides a stabilized fertilizer solution, especially a nitrogen fertilizer solution, with a content of dicyandiamide as nitrification inhibitor, wherein, for retarding dicyandiamide crystallization, the solution contains at least one water-soluble organic polymeric compound as stabilizer.
    Type: Grant
    Filed: September 21, 1982
    Date of Patent: October 9, 1984
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Horst Michaud, Hermann Raveling, Josef Seeholzer