Patents by Inventor Munirpallam A. Subramanian
Munirpallam A. Subramanian 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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Publication number: 20250051179Abstract: Novel compounds having a thortveitite-related structure are disclosed. The compounds may be colored and may be useful as pigments. The compounds are durable with respect to an acid stability test that indicates that the pigments will not substantially change color when exposed to weak acids, such as rain. The compounds disclosed herein typically inexpensive to synthesize from earth-abundant, environmentally-friendly elements or minerals, and therefore are advantageous over existing pigments in the art.Type: ApplicationFiled: October 28, 2024Publication date: February 13, 2025Applicant: Oregon State UniversityInventors: Munirpallam A. Subramanian, Jun Li, Yi-Chia Lin
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Patent number: 9758385Abstract: Novel colored compounds with a hibonite structure and a method for making the same are disclosed. The compounds may have a formula AAl12?x?yMaxMbyO19 where A is typically an alkali metal, an alkaline earth metal, a rare earth metal, Pb, Bi or any combination thereof, and Ma is Ni, Fe, Cu, Cr, V, Mn, or Co or any combination thereof, and Mb is Ti, Sn, Ge, Si, Zr, Hf, Ga, In, Zn, Mg, Nb, Ta, Sb, Mo, W or Te or any combination thereof. Compounds with varying colors, such as blue, can be made by varying A, Ma and Mb and their relative amounts. Compositions comprising the compounds and methods for making and using the same are also disclosed.Type: GrantFiled: August 16, 2016Date of Patent: September 12, 2017Assignee: Oregon State UniversityInventors: Munirpallam A. Subramanian, Arthur W. Sleight, Jun Li
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Publication number: 20160355407Abstract: Novel colored compounds with a hibonite structure and a method for making the same are disclosed. The compounds may have a formula AAl12-x-yMaxMbyO19 where A is typically an alkali metal, an alkaline earth metal, a rare earth metal, Pb, Bi or any combination thereof, and Ma is Ni, Fe, Cu, Cr, V, Mn, or Co or any combination thereof, and Mb is Ti, Sn, Ge, Si, Zr, Hf, Ga, In, Zn, Mg, Nb, Ta, Sb, Mo, W or Te or any combination thereof. Compounds with varying colors, such as blue, can be made by varying A, Ma and Mb and their relative amounts. Compositions comprising the compounds and methods for making and using the same are also disclosed.Type: ApplicationFiled: August 16, 2016Publication date: December 8, 2016Applicant: OREGON STATE UNIVERSITYInventors: MUNIRPALLAM A. SUBRAMANIAN, ARTHUR W. SLEIGHT, JUN LI
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Patent number: 8282728Abstract: Embodiments of compositions comprising materials satisfying the general formula AM1?xM?xM?yO3+y are disclosed, along with methods of making the materials and compositions. In some embodiments, M and M? are +3 cations, at least a portion of the M cations and the M? cations are bound to oxygen in trigonal bipyramidal coordination, and the material is chromophoric. In some embodiments, the material forms a crystal structure having a hexagonal unit cell wherein edge a has a length of 3.50-3.70 ? and edge c has a length of 10-13 ?. In other embodiments, edge a has a length of 5.5-7.0 ?. In particular embodiments, M? is Mn, and Mn is bonded to oxygen with an apical Mn—O bond length of 1.80 ? to 1.95 ?. In some embodiments, the material is YIn1?xMnxO3, x is greater than 0.0 and less than 0.75, and the material exhibits a surprisingly intense blue color.Type: GrantFiled: June 10, 2010Date of Patent: October 9, 2012Assignee: State of Oregon Acting by and through the State Board of Higher Education on behalf of Oregon State UniversityInventors: Munirpallam A. Subramanian, Arthur W. Sleight, Andrew E. Smith
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Publication number: 20100317503Abstract: Embodiments of compositions comprising materials satisfying the general formula AM1?xM?xM?yO3+y are disclosed, along with methods of making the materials and compositions. In some embodiments, M and M? are +3 cations, at least a portion of the M cations and the M? cations are bound to oxygen in trigonal bipyramidal coordination, and the material is chromophoric. In some embodiments, the material forms a crystal structure having a hexagonal unit cell wherein edge a has a length of 3.50-3.70 ? and edge c has a length of 10-13 ?. In other embodiments, edge a has a length of 5.5-7.0 ?. In particular embodiments, M? is Mn, and Mn is bonded to oxygen with an apical Mn—O bond length of 1.80 ? to 1.95 ?. In some embodiments, the material is YIn1?xMnxO3, x is greater than 0.0 and less than 0.75, and the material exhibits a surprisingly intense blue color.Type: ApplicationFiled: June 10, 2010Publication date: December 16, 2010Inventors: Munirpallam A. Subramanian, Arthur W. Sleight, Andrew E. Smith
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Patent number: 7129383Abstract: A process for the preparation of 2-chloro-1,1,1,3,3,3-heptafluoropropane is disclosed which involves (a) contacting a mixture comprising hydrogen fluoride, chlorine, and at least one starting material selected from the group consisting of halopropenes of the formula CX3CCI?CX2 and halopropanes of the formula the CX3CCIYCX3, wherein each X is independently F or Cl, and Y is H, Cl or F (provided that the number of X and Y which are F totals no more than six) with a chlorofluorination catalyst in a reaction zone to produce a product mixture comprising CF3CCIFCF3, HCI, HF. and underfluorinated halogenated hydrocarbon intermediates. The process is characterized by said chlorofluorination catalyst comprising at least one chromium-containing component selected from (i) a crystalline alpha-chromium oxide where at least 0.Type: GrantFiled: August 21, 2003Date of Patent: October 31, 2006Assignee: E. I. du Pont de Nemours and CompanyInventors: Mario J. Nappa, Velliyur Nott Mallikarjuna Rao, H. David Rosenfeld, Sekhar Subramoney, Munirpallam A. Subramanian, Allen C. Sievert
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Patent number: 7074973Abstract: A process for the preparation of pentafluoroethane is disclosed which involves contacting a mixture comprising hydrogen fluoride and at least one starting material selected from haloethanes of the formula CX3CHX2 and haloethanes of the formula CX2?CX2, where each X is independently selected from the group consisting of F and Cl (provided that no more than four of X are F), with a fluorination catalyst in a reaction zone to produce a product mixture comprising HF, HCl, pentafluoroethane, underfluorinated halogenated hydrocarbon intermediates and less than 0.2 mole percent chloropentafluoroethane based on the total moles of halogenated hydrocarbons in the product mixture. The process is characterized by the fluorination catalyst comprising (i) a crystalline cobalt-substituted alpha-chromium oxide where from about 0.05 atom % to about 6 atom % of the chromium atoms in the alpha-chromium oxide lattice are replaced by trivalent cobalt (Co+3) and/or (ii) a fluorinated crystalline oxide of (i).Type: GrantFiled: August 21, 2003Date of Patent: July 11, 2006Assignee: E. I. du Pont de Nemours and CompanyInventors: Mario J. Nappa, Velliyur Nott Mallikarjuna Rao, H. David Rosenfeld, Shekhar Subramoney, Munirpallam A. Subramanian, Allen C. Sievert
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Patent number: 6765783Abstract: This invention provides compositions of the formula Cu3Ta3MO12 wherein M is Al, Ga, Fe, Cr, Sc or mixtures thereof. These compositions have high dielectric constant and low loss over a frequency range of from 1 kHz to 1 MHz.Type: GrantFiled: December 6, 2002Date of Patent: July 20, 2004Assignee: E.I. du Pont de Nemours and CompanyInventor: Munirpallam A. Subramanian
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Patent number: 6759439Abstract: A process is disclosed for producing hydrocarbons. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention, the catalyst used in the process preferably includes at least cobalt, rhenium, and a promoter selected from the group including boron, phosphorus, potassium, manganese, and vanadium. The catalyst may also comprise a support material selected from the group including silica, titania, titania/alumina, zirconia, alumina, aluminum fluoride, and fluorided aluminas.Type: GrantFiled: December 3, 2002Date of Patent: July 6, 2004Assignee: ConocoPhillips CompanyInventors: Wenchun Chao, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
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Publication number: 20040110852Abstract: A process is disclosed for producing hydrocarbons. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention, the catalyst used in the process includes at least a Fischer-Tropsch metal selected from Groups 8, 9, and 10 of the periodic table and combinations thereof. The catalyst also includes a fluorided clay support material. The fluorided clay is preferably a fluorided bentonite.Type: ApplicationFiled: December 4, 2002Publication date: June 10, 2004Applicant: ConocoPhillips CompanyInventors: Nithya Srinivasan, Sergej A. Maslov, Norman Herron, Stephan Schwarz, Munirpallam A. Subramanian
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Patent number: 6727289Abstract: A process is disclosed for producing hydrocarbons. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention, the catalyst used in the process includes at least a Fischer-Tropsch metal and boron. The Fischer-Tropsch metal preferably includes cobalt and optionally ruthenium or platinum. The catalyst may also comprise a support material selected from the group including silica, titania, titania/alumina, zirconia, alumina, aluminum fluoride, and fluorided aluminas.Type: GrantFiled: January 14, 2002Date of Patent: April 27, 2004Assignee: ConocoPhillips CompanyInventors: Olga Ionkina, Wenchun Chao, Munirpallam A. Subramanian, Leo E. Manzer, Kamel M. Makar, Ajoy P. Raje
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Patent number: 6727199Abstract: This invention provides compositions of the formula Na0.5M0.5Cu3Ti4O12 wherein M=La—Lu, Y, Bi or mixtures thereof. These compositions have high dielectric constant and low loss over a frequency range of from about 1 kHz to about 1 MHz.Type: GrantFiled: October 2, 2002Date of Patent: April 27, 2004Assignee: E. I. du Pont de Nemours and CompanyInventor: Munirpallam A. Subramanian
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Publication number: 20030151882Abstract: This invention provides compositions of the formula Cu3Ta3MO12 wherein M is Al, Ga, Fe, Cr, Sc or mixtures thereof. These compositions have high dielectric constant and low loss over a frequency range of from 1 kHz to 1 MHz.Type: ApplicationFiled: December 6, 2002Publication date: August 14, 2003Inventor: Munirpallam A. Subramanian
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Publication number: 20030119922Abstract: A process is disclosed for producing hydrocarbons. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention, the catalyst used in the process preferably includes at least cobalt, rhenium, and a promoter selected from the group including boron, phosphorus, potassium, manganese, and vanadium. The catalyst may also comprise a support material selected from the group including silica, titania, titania/alumina, zirconia, alumina, aluminum fluoride, and fluorided aluminas.Type: ApplicationFiled: December 3, 2002Publication date: June 26, 2003Inventors: Wenchun Chao, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
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Publication number: 20030105171Abstract: A process for producing hydrocarbons by the Fischer-Tropsch process is provided in which a cobalt-containing catalyst is supported on a modified zirconia support selected from among silica-zirconia, tungstated zirconia, and sulfated zirconia. The catalyst shows improved performance of up to 70% in the Fischer-Tropsch reaction as compared to a corresponding catalyst supported on unmodified zirconia.Type: ApplicationFiled: November 8, 2002Publication date: June 5, 2003Applicant: Conoco Inc.Inventors: Munirpallam A. Subramanian, Norman Herron, Stephan Schwarz, Sergej A. Maslov, Nithya Srinivasan
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Publication number: 20030104924Abstract: This invention provides compositions of the formula Na0.5M0.5Cu3Ti4O12 wherein M=La—Lu, Y, Bi or mixtures thereof. These compositions have high dielectric constant and low loss over a frequency range of from about 1 kHz to about 1 MHz.Type: ApplicationFiled: October 2, 2002Publication date: June 5, 2003Inventor: Munirpallam A. Subramanian
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Publication number: 20030065043Abstract: A process is disclosed for producing hydrocarbons. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention, the catalyst used in the process includes at least a Fischer-Tropsch metal and a promoter selected from the group consisting of molybdenum, tin, gallium, and zinc. The Fischer-Tropsch metal preferably includes cobalt. The catalyst may also include a support material selected from the group including silica, titania, titania/alumina, zirconia, alumina, silica-alumina, aluminum fluoride, and fluorided aluminas.Type: ApplicationFiled: August 29, 2002Publication date: April 3, 2003Applicant: Conoco Inc.Inventors: Olga P. Ionkina, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
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Publication number: 20030027874Abstract: A catalyst and process for producing hydrocarbons using the catalyst is provided. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with the catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention the catalyst used in the process includes at least one catalytic metal for Fischer-Tropsch reactions, preferably cobalt. The catalyst further includes a structural component, preferably a support, that includes a metal selected from the group consisting of oxides of Group 2 metals, Group 3 metals, Group 6 metals, Group 8 metals, Group 12 metals, Group 15 metals, and combinations thereof, preferably as the oxide.Type: ApplicationFiled: June 27, 2002Publication date: February 6, 2003Applicant: Conoco Inc.Inventors: Norman Herron, Kostantinos Kourtakis, Munirpallam A. Subramanian, Olga Ionkina, Nithya Srinivasan
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Patent number: 6489371Abstract: A process is disclosed for producing hydrocarbons. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention, the catalyst used in the process preferably includes at least cobalt, rhenium, and a promoter selected from the group including boron, phosphorus, potassium, manganese, and vanadium. The catalyst may also comprise a support material selected from the group including silica, titania, titania/alumina, zirconia, alumina, aluminum fluoride, and fluorided aluminas.Type: GrantFiled: August 24, 2001Date of Patent: December 3, 2002Assignee: Conoco Inc.Inventors: Wenchun Chao, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
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Publication number: 20020173555Abstract: A process is disclosed for producing hydrocarbons. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention, the catalyst used in the process includes at least a Fischer-Tropsch metal and boron. The Fischer-Tropsch metal preferably includes cobalt and optionally ruthenium or platinum. The catalyst may also comprise a support material selected from the group including silica, titania, titania/alumina, zirconia, alumina, aluminum fluoride, and fluorided aluminas.Type: ApplicationFiled: January 14, 2002Publication date: November 21, 2002Applicant: Conoco Inc.Inventors: Olga Ionkina, Wenchun Chao, Munirpallam A. Subramanian, Leo E. Manzer, Kamel M. Makar, Ajoy P. Raje