Patents by Inventor Farhad Forohar
Farhad Forohar 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).
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Patent number: 11440873Abstract: A method of substituting an azide for hydrogen bonded to a tertiary carbon atom is provided. A liquid mixture in an oxygen-free environment has spaced-apart carbon and platinum electrodes disposed therein. The liquid mixture includes a solvent, ammonium azide, and a base material having at least one tertiary carbon atom with hydrogen bonded thereto. An electric current is applied to the electrodes where the liquid mixture undergoes a reaction. The electrochemically-induced reaction yields a liquid product and a solid product. The liquid product includes the solvent and a constituent having at least one tertiary carbon atom with an azide bonded thereto.Type: GrantFiled: April 7, 2020Date of Patent: September 13, 2022Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Victor Bellitto
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Patent number: 10676445Abstract: A new azido compound, 5-amino-6-chloro-2,4-diazido-pyrimidine, and a process for synthesizing. The synthesis may include reacting 5-amino-2,4,6-trichloropyrimidine and sodium azide. There is an excess molar amount of sodium azide for each chloro fractional molar amount on the 5-amino-2,4,6-trichloropyrimidine. The synthesis is a two phase reaction that is a dispersion. The 5-amino-2,4,6-trichloropyrimidine dissolved in acetone is a liquid phase, and the sodium azide is insoluble in acetone and is a solid phase, that is present in excess of chemical equivalents. The reaction product is soluble in acetone, and the reaction by-product, sodium chloride is also insoluble in acetone, and the crude yield is about 92%. Unreacted sodium azide and formed sodium chloride are removed by filtration.Type: GrantFiled: June 6, 2019Date of Patent: June 9, 2020Assignee: The United States of America as represented by the Secretary of the NavyInventors: Christopher Wilhelm, Farhad Forohar, Denisse Soto
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Patent number: 9819016Abstract: A composite electrode includes a sheet of carbon nanotubes (CNTs) and an electrically conductive metal. The sheet of CNTs include a surface region where carbon atoms are available. The metal is chemically bonded to at least a portion of the carbon atoms whereby a metal carbide is defined.Type: GrantFiled: September 29, 2015Date of Patent: November 14, 2017Assignee: The United States of America as Represented by the Secretary of the NavyInventors: Farhad Forohar, Victor Bellitto, Vasant Shivran Joshi, Stanley Caulder
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Patent number: 8778105Abstract: The invention concerns copper azide containing carbon nanotubes. The invention also concerns methods of producing such nanotubes by placing CuO nanoparticles within carbon nanotubes to produce CuO-containing carbon nanotubes, contacting CuO-containing carbon nanotubes with hydrogen to produce reduced nanotubes; and contacting the reduced nanotubes with hydrazoic acid to produce copper azide containing carbon nanotubes.Type: GrantFiled: August 28, 2013Date of Patent: July 15, 2014Assignee: The United States of America as Represented by the Secretary of the NavyInventors: Yury Gogotsi, Valarie Pelletier, Farhad Forohar, Magdy Bichay
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Publication number: 20120060984Abstract: The invention concerns copper azide containing carbon nanotubes. The invention also concerns methods of producing such nanotubes by placing CuO nanoparticles within carbon nanotubes to produce CuO-containing carbon nanotubes, contacting CuO-containing carbon nanotubes with hydrogen to produce reduced nanotubes; and contacting the reduced nanotubes with hydrazoic acid to produce copper azide containing carbon nanotubes.Type: ApplicationFiled: July 14, 2011Publication date: March 15, 2012Applicant: DREXEL UNIVERSITYInventors: Yury Gogotsi, Valarie Pelletier, Sayan Bhattacharyya, Farhad Forohar, Magdy Bichay
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Patent number: 7879166Abstract: The present invention relates generally to carbon nanotubes, and more particularly to the interaction of single wall carbon nanotubes with hydrazoic acid to introduce energetic azide groups into the nanotubes to form activated carbon nanotubes.Type: GrantFiled: October 31, 2007Date of Patent: February 1, 2011Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Magdy Bichay
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Patent number: 7833366Abstract: The present invention relates generally to methods of making carbon nanotubes, and more particularly to the interaction of single wall carbon nanotubes with hydrazoic acid to introduce energetic azide groups into the nanotubes to form activated carbon nanotubes.Type: GrantFiled: October 31, 2007Date of Patent: November 16, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Magdy Bichay
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Patent number: 7807127Abstract: The present invention relates to a carbon nanotube that contains nitrogen based functional groups (such as nitro, nitroso, N-oxide, oxime, hydroxylamine, diazo, azo, and azide) that are covalently attached to lattice carbons of the carbon nanotube, directly or via a chemical linker. The present invention also relates to methods for the preparation of the carbon nanotube from an amino-functionalized carbon nanotube via an amino oxidation reaction. The synthetic methods of the present invention allow the nitrogen based functional groups to be attached selectively to one of two distinct regions of the carbon nanotube, the ends or the sidewall, and thus enable the synthesis of a carbon nanotube having nitrogen based functional groups substantially concentrated on either the ends or the sidewall of the carbon nanotube.Type: GrantFiled: April 14, 2006Date of Patent: October 5, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Craig Whitaker, William M. Koppes
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Patent number: 7794683Abstract: The present invention relates to methods for the preparation of a carbon nanotube from an amino-functionalized carbon nanotube via an amino oxidation reaction. The carbon nanotube includes nitrogen based functional groups that are covalently attached to lattice carbons of the carbon nanotube, directly or via a chemical linker. The synthetic methods of the present invention allow the nitrogen based functional groups to be attached selectively to one of two distinct regions of the carbon nanotube, and thus enable the synthesis of a carbon nanotube having nitrogen based functional groups substantially concentrated on the ends and/or the sidewall of the carbon nanotube.Type: GrantFiled: April 14, 2006Date of Patent: September 14, 2010Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Craig Whitaker, William M. Koppes
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Patent number: 6232479Abstract: 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: GrantFiled: August 15, 2000Date of Patent: May 15, 2001Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Paritosh R. Dave, Sury Iyer
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Patent number: 6218554Abstract: 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: GrantFiled: September 15, 2000Date of Patent: April 17, 2001Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Farhad Forohar, Paritosh R. Dave, Sury Iyer
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Patent number: 5831099Abstract: Overall, the invention provides the chemistry for the compounds and for the processes to prepare compounds derived from 1,5-diazacyclooctanes. This makes available high density, high melting point, thermally stable small and medium ring nitrogen heterocycles that may also contain N-nitro, C-nitro or other functional groups. The compounds include cyclooctanes, bicyclo octanes, propellanes and functionalized derivatives of the above compounds. The preparations can include transannular cyclizations. The materials have several applications; e.g., the polynitro compounds are energetic materials.Type: GrantFiled: March 31, 1998Date of Patent: November 3, 1998Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Paritosh R. Dave, Theodore Axenrod, Farhad Forohar
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Patent number: 5352829Abstract: Energetic nitramine containing cyclotriphosphazene which include 1,1,3,3,-tris-spiro(N,N'-dinitroethylenediamino)cyclotriphosphazene, 1,1-spiro(ethylenediamino)-3,3,5,5-bis-spiro(N,N'-dinitroethylenediamino)c yclotriphosphazene, 1,1,3,3-bis-spiro(N,N'-dinitroethylenediamino)-5,5-dichlorocyclotriphospha zene, 1,1,3,3-bis-spiro(N,N'-dinitroethylenediamino)-5,5-difluorocyclotriphospha zene, 1,1-spiro(N,N'-dinitroethylenediamino)-3,3,5,5-bis-spiro(ethylenediamino)c yclotriphosphazene, 1,1-spiro(ethylenediamino)-3,3-spiro(N,N'-dinitroethylenediamino)-5,5-dich lorocyclotriphosphazene, 1,1-spiro(ethylenediamino)-3,3-spiro(N,N'-dinitroethylenediamino)-5,5-difl uorocyclotriphosphazene, 1,1-spiro(N,N'-dinitroethylenediamino)-3,3,5,5-tetrachlorocyclotriphosphaz ene, and 1,1-spiro(N,N'-dinitroethylenediamino)-3,3,5,5-tetrafluorocyclotriphosphaz ene, which can be used in explosive compositions.Type: GrantFiled: April 2, 1993Date of Patent: October 4, 1994Assignee: The United States of America as represented by the Secretary of the NavyInventors: Paritosh R. Dave, Farhad Forohar, Michael Chaykovsky, Clifford D. Bedford