Patents by Inventor Donald R. Long

Donald R. Long 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).

  • Methods of making manganese sulfide
    Patent number: 6793906
    Abstract: The present invention provides methods for making manganese sulfide without the need for recycling a significant amount of manganese sulfide back to the reaction chamber. The methods are performed by admixing substantially pure manganese, substantially pure sulfur, and iron pyrite. The manganese and sulfur are then reacted to form manganese sulfide. Iron pyrite regulates the reaction and enables the use of conventional equipment in the methods of the present invention. After the reaction ends, the manganese sulfide product is separated from the unreacted manganese, sulfur, and iron.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: September 21, 2004
    Inventors: Robert W. Shelton, Donald R. Long
  • Methods of making manganese sulfide
    Publication number: 20030190280
    Abstract: The present invention provides methods for making manganese sulfide without the need for recycling a significant amount of manganese sulfide back to the reaction chamber. The methods are performed by admixing substantially pure manganese, substantially pure sulfur, and iron pyrite. The manganese and sulfur are then reacted to form manganese sulfide. Iron pyrite regulates the reaction and enables the use of conventional equipment in the methods of the present invention. After the reaction ends, the manganese sulfide product is separated from the unreacted manganese, sulfur, and iron.
    Type: Application
    Filed: April 4, 2002
    Publication date: October 9, 2003
    Inventors: Robert W. Shelton, Donald R. Long