Patents by Inventor John Fronabarger

John Fronabarger 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).

  • Single reaction vessel process for synthesis of salts of DNP
    Patent number: 8927734
    Abstract: A batch reactor process for the synthesis of potassium 5,7-dinitro-[2,1,3]-benzoxadiazol-4-olate-3-oxide (KDNP) from 3-bromo-2,4,6-trinitroanisole (ETNA) includes adding BTNA to a reaction vessel containing potassium azide (KN3) and water (H2O). The resulting mixture is heated to 90° C. followed by cooling to room temperature and agitating the final solution. The precipitate KDNP product is recovered by filtration.
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: January 6, 2015
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Patrick Caruana, Bradley Sleadd, John Fronabarger, Michael D. Williams
  • 3-azido-2,4,6-trinitrophenol, method of making, and method of transforming
    Patent number: 8748639
    Abstract: The present disclosure sets forth the compound 3-azidopicric acid and a method of making the same. The method of producing 3-azidopicric acid is a two step reaction process of first reacting 3-aminopicric acid with sulfuric acid and sodium nitrite, and then reacting the result of the first step with phosphoric acid and sodium azide. Additionally described is a method of producing KDNP (4,6-dinitro-7-hydroxybenzofuroxan, potassium salt), by reacting 3-AzPA with potassium bicarbonate.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: June 10, 2014
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Bradley A. Sleadd, John Fronabarger
  • PROCESS FOR PREPARING SUBSTITUTED TETRAZOLES FROM AMINOTETRAZOLE
    Publication number: 20070161801
    Abstract: The present invention is directed to the field of substituted tetrazole synthesis and manufacture. More particularly, the present invention is directed to processes for preparing substituted tetrazoles and tetrazolate salts, such as sodium nitrotetrazolate and sodium cyanotetrazolate, using small scale and/or microreactor techniques. The use of the present techniques result in less hazardous and more efficient manufacturing processes.
    Type: Application
    Filed: September 8, 2005
    Publication date: July 12, 2007
    Inventors: Robert Renz, Michael Williams, John Fronabarger