Patents by Inventor Sury Iyer

Sury Iyer 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).

  • Substituted cyclotetraphophazene compound and method of producing the same
    Patent number: 6232479
    Abstract: A novel cyclotetraphosphazene compound, 1,1-diamino-3,3,5,5,7,7-hexaazidocyclotetraphosphazene, is disclosed which has application as an energetic compound and percussion primer. Also disclosed is a method of preparing the compound.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: May 15, 2001
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Farhad Forohar, Paritosh R. Dave, Sury Iyer
  • Substituted cyclotetraphosphazene compound and method of producing the same
    Patent number: 6218554
    Abstract: A novel cyclotetraphosphazene compound, 1,5-diamino-1,3,3,5,7,7-hexaazidocyclotetraphosphazene, is disclosed which has application as an energetic compound. Also disclosed is a method of preparing the compound.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: April 17, 2001
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Farhad Forohar, Paritosh R. Dave, Sury Iyer
  • Conversion of trinitrotoluene into high value compounds
    Patent number: 5969155
    Abstract: The present invention is directed to the synthesis of useful products from the explosive trinitrotoluene. This substance has a limited shelf life as a reliable explosive and large quantities of it have and will become surplus. Ecologically safe, and preferably commercially useful ways of disposing of it are therefore much to be desired. In the present invention the end products are nitroindoles of the general formula 4-Z.sup.1,6-Z.sup.2 indole wherein Z.sup.1 and Z.sup.2 are the same or different and are halo or nitro provided at least one of said groups is nitro.
    Type: Grant
    Filed: April 9, 1998
    Date of Patent: October 19, 1999
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Sreenivasa R. Eturi, Abdollah Bashir-Hashemi, Sury Iyer
  • 2,4-dinitroimidazole- a less sensitive explosive and propellant made by thermal rearrangement of molten 1,4 dinitroimidazole
    Patent number: 5387297
    Abstract: The compound 2,4-dinitroimidazole is highly insensitive towards impact and its thermal stability is excellent. The calculated detonation properties results indicate that its performance is about 30% better than TATB. It can be prepared easily with good yield starting from inexpensive starting materials. Results from impact sensitivity, friction sensitivity time-to-explosion temperature and vacuum stability tests indicate that 2,4-dinitroimidazole is less sensitive than both RDX and HMX. Its good oxygen balance and measured heat of formation data of this material indicate that its propellant performance is good.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: February 7, 1995
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Reddy Damavarapu, Keerti Jayasuriya, Theodore Vladimiroff, Sury Iyer
  • Production of polymer bonded nitramine explosive and propellant compositions
    Patent number: 4343664
    Abstract: Polymer bonded nitramine based explosives and propellants are prepared by diation polymerization of a polymer precurser, such as methyl methacrylate, in mixture with a particulate nitramine, e.g. RDX, wherein the nitramine particles are coated with an effective amount of a liquid polyhydric alcohol for overcoming the action of the nitramine to inhibit or retard such radiation polymerization.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: August 10, 1982
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Sury Iyer