Patents by Inventor Padmanabhan Srinivasan
Padmanabhan Srinivasan 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: 20240155186Abstract: Example apparatus disclosed herein are to determine a location of a portable device based on location data collected by the portable device, determine whether a person is within a threshold distance of the portable device based on proximity data collected by the portable device, and, when the person is determined to be within the threshold distance of the portable device: (i) infer at least one of a presence or an absence of the person in a media exposure environment based on the location of the portable device, (ii) determine a confidence level that the person corresponds to a member of the panelist household, and (iii) determine an accuracy of presence information collected by a people meter based on the confidence level and the inference of the at least one of the presence or the absence of the person, the people meter different than the portable device.Type: ApplicationFiled: January 12, 2024Publication date: May 9, 2024Inventors: Padmanabhan Soundararajan, Venugopal Srinivasan, Alexander Topchy
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Publication number: 20240155187Abstract: Example apparatus disclosed herein are to determine a location of a portable device based on location data collected by the portable device, determine whether a person is within a threshold distance of the portable device based on proximity data collected by the portable device, and, when the person is determined to be within the threshold distance of the portable device: (i) infer at least one of a presence or an absence of the person in a media exposure environment based on the location of the portable device, (ii) determine a confidence level that the person corresponds to a member of the panelist household, and (iii) determine an accuracy of presence information collected by a people meter based on the confidence level and the inference of the at least one of the presence or the absence of the person, the people meter different than the portable device.Type: ApplicationFiled: January 16, 2024Publication date: May 9, 2024Inventors: Padmanabhan Soundararajan, Venugopal Srinivasan, Alexander Topchy
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Patent number: 11942099Abstract: Disclosed example people monitoring methods include detecting a first watermark in a first audio signal obtained from an acoustic sensor, the first watermark identifying media presented by a monitored media device, determining whether a second watermark, different from the first watermark, is embedded in the first audio signal obtained from the acoustic sensor, the second watermark identifying at least one of a mobile device or a user of the mobile device, classifying the second watermark as a media watermark or a people monitoring watermark based on a characteristic of the second watermark, and when the second watermark is determined to be embedded in the first audio signal, reporting at least one of the second watermark or information decoded from the second watermark to identify at least one of the mobile device or the user of the mobile device as being exposed to the media presented by the monitored media device.Type: GrantFiled: December 29, 2021Date of Patent: March 26, 2024Assignee: The Nielsen Company (US), LLCInventors: Alexander Topchy, Padmanabhan Soundararajan, Venugopal Srinivasan
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Patent number: 11189840Abstract: A method for manufacturing a composite electrode for a metal-air electrochemical cell with a liquid electrolyte of basic pH. A liquid solution comprising a fluoropolymer suspended in a solvent is synthesized, then deposited on the outer surface of a porous structure forming an air electrode. The fluoropolymer comprises SO2N groups suitable for conducting hydroxyl ions and is capable of forming a membrane impermeable to at least the liquid electrolyte of basic pH. When the liquid solution is applied to the porous structure, the solvent flows through the porous structure and the fluoropolymer is deposited by aggregating into a layer on the outer surface of the porous structure.Type: GrantFiled: February 13, 2020Date of Patent: November 30, 2021Assignees: ELECTRICITE DE FRANCE, SOLVAY SAInventors: Philippe Stevens, Gwenaelle Toussaint, Sophie Deshayes, Silvia Rita Petricci, Padmanabhan Srinivasan
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Publication number: 20200185727Abstract: A method for manufacturing a composite electrode for a metal-air electrochemical cell with a liquid electrolyte of basic pH. A liquid solution comprising a fluoropolymer suspended in a solvent is synthesized, then deposited on the outer surface of a porous structure forming an air electrode. The fluoropolymer comprises SO2N groups suitable for conducting hydroxyl ions and is capable of forming a membrane impermeable to at least the liquid electrolyte of basic pH. When the liquid solution is applied to the porous structure, the solvent flows through the porous structure and the fluoropolymer is deposited by aggregating into a layer on the outer surface of the porous structure.Type: ApplicationFiled: February 13, 2020Publication date: June 11, 2020Inventors: Philippe Stevens, Gwenaelle Toussaint, Sophie Deshayes, Silvia Rita Petricci, Padmanabhan Srinivasan
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Publication number: 20180366737Abstract: A method for manufacturing a composite electrode for a metal-air electrochemical cell with a liquid electrolyte of basic pH. A liquid solution comprising a fluoropolymer suspended in a solvent is synthesized, then deposited on the outer surface of a porous structure forming an air electrode. The fluoropolymer comprises SO2N groups suitable for conducting hydroxyl ions and is capable of forming a membrane impermeable to at least the liquid electrolyte of basic pH. When the liquid solution is applied to the porous structure, the solvent flows through the porous structure and the fluoropolymer is deposited by aggregating into a layer on the outer surface of the porous structure.Type: ApplicationFiled: December 9, 2016Publication date: December 20, 2018Inventors: Philippe Stevens, Gwenaelle Toussaint, Sophie Deshayes, Silvia Rita Petricci, Padmanabhan Srinivasan
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Patent number: 8999192Abstract: A process for transferring heat from a heat source to a heat sink, comprising using as heat transfer medium a composition comprising: at least one fluorinated fluid free from functional groups (fluid (H)); at least one functional (per)fluoropolyether (functional PFPE(1)) comprising recurring units (R1), said recurring units comprising at least one ether linkage in the main chain and at least one fluorine atom (fluoropolyoxyalkylene chain), and at least one functional end group chosen between —COOH and —CONH2; at least one functional (per)fluoropolyether (functional PFPE(2)) comprising recurring units (R1) as defined above and at least one functional end group chosen between —COCF3 and its hydroxylated derivative —C(OH)2CF3.Type: GrantFiled: September 22, 2009Date of Patent: April 7, 2015Assignee: Solvay Specialty Polymers Italy S.p.A.Inventors: Pier Antonio Guarda, Gianfranco Spataro, Padmanabhan Srinivasan, Giuseppe Marchionni
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Patent number: 8461448Abstract: The present invention pertains to a solar cell module comprising at least one photovoltaic element encapsulated between a front layer on its light receiving surface side and a back layer, said front layer comprising at least one layer comprising a tetrafluoroethylene (TFE) polymer [polymer (F)], said polymer (F) comprising: recurring units derived from TFE; and from 15 to 25% wt of recurring units derived from at least one perfluoromonomer [monomer (CM)] chosen among: (i) perfluoroalkylvinylethers complying with formula CF2?CFORf1, in which Rf1 is a C1-C6 perfluoroalkyl, e.g. —CF3, —C2F5, —C3F7; and/or (ii) perfluoro-oxyalkylvinylethers complying with formula CF2?CFOX0, in which X0 is a C1-C12 perfluorooxyalkyl having one or more ether groups, like perfluoro-2-propoxy-propyl; and (iii) mixtures thereof. Still objects of the invention are a process for the manufacture of the solar cell module as above defined and its use for producing current to external sources, e.g. for powering a fixed-wing aircraft.Type: GrantFiled: April 4, 2008Date of Patent: June 11, 2013Assignee: Solvay Specialty Polymers Italy S.p.A.Inventors: Paolo Toniolo, Padmanabhan Srinivasan, Alessio Marrani, Giambattista Besana, Vincenzo Arcella
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Publication number: 20110175016Abstract: A process for transferring heat from a heat source to a heat sink, comprising using as heat transfer medium a composition comprising: at least one fluorinated fluid free from functional groups (fluid (H)); at least one functional (per)fluoropolyether (functional PFPE(1)) comprising recurring units (R1), said recurring units comprising at least one ether linkage in the main chain and at least one fluorine atom (fluoropolyoxyalkylene chain), and at least one functional end group chosen between —COOH and —CONH2; at least one functional (per)fluoropolyether (functional PFPE(2)) comprising recurring units (R1) as defined above and at least one functional end group chosen between —COCF3 and its hydroxylated derivative —C(OH)2CF3.Type: ApplicationFiled: September 22, 2009Publication date: July 21, 2011Applicant: SOLVAY SOLEXIS S.P.A.Inventors: Pier Antonio Guarda, Gianfranco Spataro, Padmanabhan Srinivasan, Giuseppe Marchionni
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Publication number: 20100187469Abstract: The invention pertains to a heat transfer composition comprising: at least one fluorinated ether fluid free from functional groups (fluid (H)); from 0.01 to 5% wt with respect to fluid (H) of at least one solid nano-sized additive chosen among metal, metal oxide or carbonaceous material particles, having an average particle size of less than 2 000 nm (additive (N)); and from 0.1 to 10% wt with respect to fluid (H) of at least one functional (per)fluoropolyether comprising recurring units (R1), said recurring units comprising at least one ether linkage in the main chain and at least one fluorine atom (fluoropolyoxyalkene chain) and comprising at least one functional group (functional PFPE (F)).Type: ApplicationFiled: August 5, 2008Publication date: July 29, 2010Applicant: SOLVAY SOLEXIS S.P.A.Inventors: Padmanabhan Srinivasan, Gianfranco Spataro, Gabriella Carignano, Mattia Bassi, Francesca Farina
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Publication number: 20100116927Abstract: The present invention pertains to a solar cell module comprising at least one photovoltaic element encapsulated between a front layer on its light receiving surface side and a back layer, said front layer comprising at least one layer comprising a tetrafluoroethylene (TFE) polymer [polymer (F)], said polymer (F) comprising: recurring units derived from TFE; and from 15 to 25% wt of recurring units derived from at least one perfluoromonomer [monomer (CM)] chosen among: (i) perfluoroalkylvinylethers complying with formula CF2?CFORf1, in which Rf1 is a C1-C6 perfluoroalkyl, e.g. —CF3, —C2F5, —C3F7; and/or (ii) perfluoro-oxyalkylvinylethers complying with formula CF2?CFOX0, in which X0 is a C1-C12 perfluorooxyalkyl having one or more ether groups, like perfluoro-2-propoxy-propyl; and (iii) mixtures thereof. Still objects of the invention are a process for the manufacture of the solar cell module as above defined and its use for producing current to external sources, e.g. for powering a fixed-wing aircraft.Type: ApplicationFiled: April 4, 2008Publication date: May 13, 2010Applicant: SOLVAY SOLEXIS S.P.A.Inventors: Paolo Toniolo, Padmanabhan Srinivasan, Alessio Marrani, Giambattista Besana, Vincenzo Arcella
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Patent number: 5948737Abstract: Greases comprising a mineral and/or synthetic lubricating oil having an hydrogenated basis, a fluoropolyethereal oil and an organic or inorganic thickening agent, wherein the weight ratio lubricating oil+fluoropolyethereal oil/thickening agent ranges from 97:3 to 80:20 and the weight ratio lubricating oil/fluoropolyethereal oil ranges from 95:5 to 60:40.Type: GrantFiled: November 18, 1996Date of Patent: September 7, 1999Assignee: Ausimont S.p.A.Inventors: Padmanabhan Srinivasan, Laura Montagna, Paolo Savelli, Costante Corti
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Patent number: 5602225Abstract: A process is described for imparting oil- and water-repellency to textile fibers, skin, leather and the like, wherein a composition comprising a functionalized (per)fluoropolyoxyalkylene with silane groups and a phosphoric monoester derived from a (per)fluoropolyoxyalkylene is applied on said materials. As dispersing agent, an hydrophilic organic solvent (for instance an alcohol), optionally in admixture with water can be used. Limpid, stable and easily dilutable formulations are thus obtained, which are capable of imparting very good properties both of oil- and water-repellency. Such properties keep for a long time also after washing both in water by means of detergents and by dry cleaning with organic solvents.Type: GrantFiled: October 13, 1995Date of Patent: February 11, 1997Assignee: Ausimont S.p.A.Inventors: Laura Montagna, Mauro Scapin, Padmanabhan Srinivasan
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Patent number: 5571780Abstract: The invention relates to a process for reducing the back migration of the most volatile fractions of perfluoropolyethers during the operation of mechanical vaccum-generating pumps which utilize perfluoropolyethers: use is made of perfluoropolyethers containing not more than 0.1% by weight of fractions having a molecular weight lower than or equal to 1,500 and not more than 1.3% by weight of fractions having a molecular weight lower than or equal to 1,800.Type: GrantFiled: February 9, 1996Date of Patent: November 5, 1996Assignee: Ausimont S.p.A.Inventors: Rossella Silvani, Valerio Carsetti, Casimiro Pace, Padmanabhan Srinivasan
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Patent number: 4977222Abstract: The cross-linking or curing of thermosetting resins and of hot curable elastomers is carried out by heating the material or the article comprising the resin (or the elastomer) by saturated vapor of the commercial perfluoropolyether having an average boiling point corresponding to the temperature necessary for the cross-linking and having a point range not exceeding 12.degree. C. (measured according to ASTM D 1078) in the presence of a chlorofluorohydrocarbon secondary vapor.Type: GrantFiled: March 11, 1988Date of Patent: December 11, 1990Assignee: Ausimont S.p.A.Inventors: Gianangelo Bargigia, Alberto Re, Luigi Corbelli, Ken Johns, Luciano Flabbi, Padmanabhan Srinivasan