Patents by Inventor Henry Duffin

Henry Duffin 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).

  • Production of hexanitrostilbene (HNS)
    Patent number: 5023386
    Abstract: A relatively fast process for producing HNS from trinitrotoluene (TNT) in high yield consists of oxidizing TNT with an oxidizing transition metal compound within a polar aprotic solvent having a weak base, such as an alkali metal carboxylate, dissolved therein. The amount of transition metal compound used is typically at least one mole per mole of TNT. An especially preferred transition metal compound for use in the present process is cupric chloride.
    Type: Grant
    Filed: January 4, 1990
    Date of Patent: June 11, 1991
    Assignee: The Secretary of State for Defence in her Britannic Majesty's Goverment of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Peter Golding, Asoka M. Jayaweera-Bandara, Henry Duffin