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).

  • Publication number: 20250051179
    Abstract: 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: Application
    Filed: October 28, 2024
    Publication date: February 13, 2025
    Applicant: Oregon State University
    Inventors: Munirpallam A. Subramanian, Jun Li, Yi-Chia Lin
  • Patent number: 9758385
    Abstract: 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: Grant
    Filed: August 16, 2016
    Date of Patent: September 12, 2017
    Assignee: Oregon State University
    Inventors: Munirpallam A. Subramanian, Arthur W. Sleight, Jun Li
  • Publication number: 20160355407
    Abstract: 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: Application
    Filed: August 16, 2016
    Publication date: December 8, 2016
    Applicant: OREGON STATE UNIVERSITY
    Inventors: MUNIRPALLAM A. SUBRAMANIAN, ARTHUR W. SLEIGHT, JUN LI
  • Patent number: 8282728
    Abstract: 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: Grant
    Filed: June 10, 2010
    Date of Patent: October 9, 2012
    Assignee: State of Oregon Acting by and through the State Board of Higher Education on behalf of Oregon State University
    Inventors: Munirpallam A. Subramanian, Arthur W. Sleight, Andrew E. Smith
  • Publication number: 20100317503
    Abstract: 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: Application
    Filed: June 10, 2010
    Publication date: December 16, 2010
    Inventors: Munirpallam A. Subramanian, Arthur W. Sleight, Andrew E. Smith
  • Patent number: 7129383
    Abstract: 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: Grant
    Filed: August 21, 2003
    Date of Patent: October 31, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mario J. Nappa, Velliyur Nott Mallikarjuna Rao, H. David Rosenfeld, Sekhar Subramoney, Munirpallam A. Subramanian, Allen C. Sievert
  • Patent number: 7074973
    Abstract: 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: Grant
    Filed: August 21, 2003
    Date of Patent: July 11, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Mario J. Nappa, Velliyur Nott Mallikarjuna Rao, H. David Rosenfeld, Shekhar Subramoney, Munirpallam A. Subramanian, Allen C. Sievert
  • Patent number: 6765783
    Abstract: 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: Grant
    Filed: December 6, 2002
    Date of Patent: July 20, 2004
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Munirpallam A. Subramanian
  • Patent number: 6759439
    Abstract: 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: Grant
    Filed: December 3, 2002
    Date of Patent: July 6, 2004
    Assignee: ConocoPhillips Company
    Inventors: Wenchun Chao, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
  • Publication number: 20040110852
    Abstract: 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: Application
    Filed: December 4, 2002
    Publication date: June 10, 2004
    Applicant: ConocoPhillips Company
    Inventors: Nithya Srinivasan, Sergej A. Maslov, Norman Herron, Stephan Schwarz, Munirpallam A. Subramanian
  • Patent number: 6727289
    Abstract: 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: Grant
    Filed: January 14, 2002
    Date of Patent: April 27, 2004
    Assignee: ConocoPhillips Company
    Inventors: Olga Ionkina, Wenchun Chao, Munirpallam A. Subramanian, Leo E. Manzer, Kamel M. Makar, Ajoy P. Raje
  • Patent number: 6727199
    Abstract: 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: Grant
    Filed: October 2, 2002
    Date of Patent: April 27, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Munirpallam A. Subramanian
  • Publication number: 20030151882
    Abstract: 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: Application
    Filed: December 6, 2002
    Publication date: August 14, 2003
    Inventor: Munirpallam A. Subramanian
  • Publication number: 20030119922
    Abstract: 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: Application
    Filed: December 3, 2002
    Publication date: June 26, 2003
    Inventors: Wenchun Chao, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
  • Publication number: 20030105171
    Abstract: 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: Application
    Filed: November 8, 2002
    Publication date: June 5, 2003
    Applicant: Conoco Inc.
    Inventors: Munirpallam A. Subramanian, Norman Herron, Stephan Schwarz, Sergej A. Maslov, Nithya Srinivasan
  • Publication number: 20030104924
    Abstract: 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: Application
    Filed: October 2, 2002
    Publication date: June 5, 2003
    Inventor: Munirpallam A. Subramanian
  • Publication number: 20030065043
    Abstract: 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: Application
    Filed: August 29, 2002
    Publication date: April 3, 2003
    Applicant: Conoco Inc.
    Inventors: Olga P. Ionkina, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
  • Publication number: 20030027874
    Abstract: 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: Application
    Filed: June 27, 2002
    Publication date: February 6, 2003
    Applicant: Conoco Inc.
    Inventors: Norman Herron, Kostantinos Kourtakis, Munirpallam A. Subramanian, Olga Ionkina, Nithya Srinivasan
  • Patent number: 6489371
    Abstract: 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: Grant
    Filed: August 24, 2001
    Date of Patent: December 3, 2002
    Assignee: Conoco Inc.
    Inventors: Wenchun Chao, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
  • Publication number: 20020173555
    Abstract: 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: Application
    Filed: January 14, 2002
    Publication date: November 21, 2002
    Applicant: Conoco Inc.
    Inventors: Olga Ionkina, Wenchun Chao, Munirpallam A. Subramanian, Leo E. Manzer, Kamel M. Makar, Ajoy P. Raje