Patents by Inventor John H. Hoare

John H. Hoare 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).

  • SYNTHESIS OF 3,4-BIS(4-NITRO-1,2,5-OXADIAZOL-3-YL)-1,2,5-OXADIAZOLE-N-OXIDE (DNTF) USING 3-CHLOROCARBOHYDROXYMOYL-4-NITRO-1,2,5-OXADIAZOLE
    Publication number: 20160264534
    Abstract: A novel method for preparing 3-chlorocarbohydroxymoyl-4-nitro-1,2,5-oxadiazole by reacting 4-amino-3-chlorocarbohydroxymoyl-1,2,5-oxadiazole with H2O2 and a tungsten based catalyst and use of the prepared 3-chlorocarbohydroxymoyl-4-nitro-1,2,5-oxadiazole for synthesizing 3,4-Bis(4-nitro-1,2,5-oxadizaol-3-yl)-1,2,5-oxadiazole-N-oxide (DNTF).
    Type: Application
    Filed: March 4, 2016
    Publication date: September 15, 2016
    Applicant: U.S. Government as Represented by the Secretary of the Army
    Inventors: Reddy S. Damavarapu, Raja G. Duddu, John H. Hoare
  • Synthesis of 3,4-Bis(4-nitro-1,2,5-oxadizaol-3-yl)-1,2,5-oxadizaole-N-oxide (DNTF) using 3-chlorocarbohydroxymoyl-4-nitro-1,2,5-oxadizaole
    Patent number: 9440936
    Abstract: A novel method for preparing 3-chlorocarbohydroxymoyl-4-nitro-1,2,5-oxadiazole by reacting 4-amino-3-chlorocarbohydroxymoyl-1,2,5-oxadiazole with H2O2 and a tungsten based catalyst and use of the prepared 3-chlorocarbohydroxymoyl-4-nitro-1,2,5-oxadiazole for synthesizing 3,4-Bis(4-nitro-1,2,5-oxadizaol-3-yl)-1,2,5-oxadiazole-N-oxide (DNTF).
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: September 13, 2016
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Reddy S. Damavarapu, Raja G. Duddu, John H. Hoare
  • Process for the selective chlorination of 4,5-dihydro-1-phenyl-1H-1,2,4-triazol-5-one
    Patent number: 5468868
    Abstract: This invention provides a process for optimizing the yield of a 1-(2,4-dichlorophenyl)-4,5-dihydro-1H-1,2,4-triazol-5-one by the chlorination in two steps of a 4,5-dihydro-1-phenyl-1H-1,2,4-triazol-5-one. The critical first step is the selective chlorination of the phenyl ring in the 4-position by addition of chlorine to a solution of the 4,5-dihydro-1-phenyl-1H-1,2,4-triazol-5-one in N,N-dimethylformamide. Chlorination of the product of the first step in acetic acid/water yields the 1-(2,4-dichlorophenyl)-4,5-dihydro-1H-1,2,4-triazol-5-one in high yield.
    Type: Grant
    Filed: December 16, 1993
    Date of Patent: November 21, 1995
    Assignee: FMC Corporation
    Inventors: Marc Halfon, Craig A. Polsz, John H. Hoare
  • Nitration of phenyl triazolinones
    Patent number: 5011933
    Abstract: Process for the nitration of a compound of formula I below with nitric acid in sulfuric acid, according to the following general equation: ##STR1## where X is a Cl or F and R is haloalkyl, for example CHF.sub.2 or CF.sub.2 CHF.sub.2, in which the improvement comprises carrying out said reaction in fuming sulfuric acid.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: April 30, 1991
    Assignee: FMC Corporation
    Inventors: John H. Hoare, Marc Halfon