Patents by Inventor Girish Srinivas
Girish Srinivas 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: 12241795Abstract: A thermally luminescent temperature sensor with a rare earth emitter having a first selective electromagnetic light energy emission band and a second selective electromagnetic light energy emission band in which the rare earth emitter converts thermal energy to electromagnetic light energy within the first and second selective energy emission bands. The sensor also has a selective optical detector in optical communication with the rare earth emitter, wherein the selective optical detector independently detects each the first and second selective electromagnetic light energy emission bands. Lastly, the thermally luminescent temperature sensor determines the temperature based on the electromagnetic light energy measured within the first and second selective energy emission bands relative to each other. Optionally additional emission bands may be used in the evaluation of the temperature.Type: GrantFiled: July 19, 2019Date of Patent: March 4, 2025Assignee: TDA Research, Inc.Inventors: John M Alford, David P Eisenberg, Girish Srinivas
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Publication number: 20250057276Abstract: A composite material for mitigating blast shockwave energy, comprising a rubber compound layer impregnated with a shear thickening fluid. The layered composite material comprises a first layer of soft foam, a second layer of hard foam, a third layer of thermoset or thermoplastic compound, and a fourth layer of the rubber compound. The layered composite material does not comprise any fibers or yarns. The layers are bound together and have a total height of less than 0.85 inches. It attenuates up to 80% of an incident blast shockwave impulse and up to 61% of an incident blast shockwave pressure for an incident blast shockwave of 50 psi. A helmet liner made of the layered composite material and capable of fitting a helmet such there are no gaps between the user's head and the helmet during use. The helmet liner may be a flat headband that folds into a helmet's edges.Type: ApplicationFiled: August 14, 2024Publication date: February 20, 2025Inventors: Denis Kissounko, Girish Srinivas
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Publication number: 20240238118Abstract: A cooling garment for use by workers in hot, humid climates comprising: a moisture-wicking under layer; an outer layer with an air permeability less than 200 L/m2/s when subjected to 125 Pascals of air pressure; at least one air channel formed between the layers and supported in at least some locations by a porous filler material; and an above ambient pressure gas supply attached operably to the inlet of the channel. Also a cooling garment comprising: a moisture-wicking under layer; an outer layer; one large air channel formed between the layers; tacks connecting the outer layer to the moisture-wicking under layer to prevent ballooning; and an above ambient pressure gas supply operably attached to the inlet of the channel.Type: ApplicationFiled: January 16, 2024Publication date: July 18, 2024Inventors: David P. Eisenberg, Robert James Copeland, Sara Locke, Alexander Riffe, Girish Srinivas
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Publication number: 20240217838Abstract: A continuous hydrothermal process for producing LFP/LMFP cathode materials for lithium-ion batteries. The reactant solutions include: (1) a lithium precursor (LiOH) and a carbon source (15 wt % sucrose); (2) an iron precursor (FeSO4) and a phosphorus precursor (H3PO4); and in the case of LMFP, a manganese precursor (MnSO4) and a surfactant in solution 2. Reactant solutions are fed into a series of one or more continuous stirred tank reactors (CSTRs) at a constant flowrate. Active LFP/LMFP flows out of the CSTRs and into a collection tank, where it is cooled and depressurized. The product flows into a slurry tank, then a centrifugal separator to remove aqueous waste. The LFP/LMFP is transferred to a continuous rotary kiln for drying and sintering, and the carbon coating forms. The disclosed processes produce LFP/LMFP with small average particle size, high purity, high capacity, and high yield without any ball-milling or sieving steps.Type: ApplicationFiled: January 26, 2024Publication date: July 4, 2024Inventors: Girish Srinivas, Vinh T Nguyen, Steven Dietz
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Publication number: 20210318184Abstract: A thermally luminescent temperature sensor with a rare earth emitter having a first selective electromagnetic light energy emission band and a second selective electromagnetic light energy emission band in which the rare earth emitter converts thermal energy to electromagnetic light energy within the first and second selective energy emission bands. The sensor also has a selective optical detector in optical communication with the rare earth emitter, wherein the selective optical detector independently detects each the first and second selective electromagnetic light energy emission bands. Lastly, the thermally luminescent temperature sensor determines the temperature based on the electromagnetic light energy measured within the first and second selective energy emission bands relative to each other. Optionally additional emission bands may be used in the evaluation of the temperature.Type: ApplicationFiled: July 19, 2019Publication date: October 14, 2021Inventors: John M Alford, David P Eisenberg, Girish Srinivas
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Patent number: 11077421Abstract: The present invention relates to a carbon sorbent the can selectively remove platinum-group metals and other heavy metals such as tin without co-removing organic synthesis products including pharmaceutical intermediates and finished Active Pharmaceutical Ingredients (APIs). The carbon sorbents of the present invention are made from low-cost, high purity starting materials and the resulting carbon sorbents are also very pure. The carbon sorbents possess a combination of certain nitrogen and phosphorous groups combined with mesoporosity (2 to 50 nm diameter pores) that proves the high metal adsorption.Type: GrantFiled: March 24, 2017Date of Patent: August 3, 2021Assignee: TDA Research, Inc.Inventors: Girish Srinivas, Steven Dietz
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Patent number: 10899973Abstract: The present invention provides a steam reforming process for heavy oil or hydrocarbons using a circulating fluidized bed reactor, the process having a reforming step and a regeneration step, wherein the reforming step and the regeneration step comprise a fluidized reactor containing a fluidizable nickel-containing reforming catalyst and produce hydrogen as a product of the reforming bed. The invention produces high purity hydrogen in the synthesis gas product stream and avoids irreversible fouling on the catalyst.Type: GrantFiled: March 4, 2019Date of Patent: January 26, 2021Assignee: TDA Research, Inc.Inventors: Girish Srinivas, Steven Charles Gebhard, Robert James Copeland, Steve Schwab
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Patent number: 10876901Abstract: A decoupling radiant and convective heat sensing device having sensor elements facing in different directions, and a decoupling radiant and convective heat sensing device having sensor elements facing in different directions with a means for determining the remaining time before a Self Contained Breathing Apparatus facemask will become compromised by dangerous heat conditions.Type: GrantFiled: August 28, 2017Date of Patent: December 29, 2020Assignee: TDA Research, IncInventors: Girish Srinivas, Michael Karpuk, Steven Gebhard, Joe Fredrickson, Andrew D. Galloway
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Patent number: 10266405Abstract: The present invention provides a steam reforming process for heavy oil or hydrocarbons using a circulating fluidized bed reactor, the process having a reforming step and a regeneration step, wherein the reforming step and the regeneration step comprise a bubbling fluidized reactor containing a fluidizable nickel-containing reforming catalyst and produce hydrogen as a product of the reforming bed. The API gravity of the feedstock may be between ?11 and 54, preferably between ?11 and 20.Type: GrantFiled: April 28, 2015Date of Patent: April 23, 2019Assignee: TDA Research, Inc.Inventors: Girish Srinivas, Steven Charles Gebhard, Robert James Copeland
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Publication number: 20190099737Abstract: The present invention relates to a carbon sorbent the can selectively remove platinum-group metals and other heavy metals such as tin without co-removing organic synthesis products including pharmaceutical intermediates and finished Active Pharmaceutical Ingredients (APIs). The carbon sorbents of the present invention are made from low-cost, high purity starting materials and the resulting carbon sorbents are also very pure. The carbon sorbents possess a combination of certain nitrogen and phosphorous groups combined with mesoporosity (2 to 50 nm diameter pores) that proves the high metal adsorption.Type: ApplicationFiled: March 24, 2017Publication date: April 4, 2019Inventors: Girish Srinivas, Steven Dietz
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Patent number: 9927178Abstract: A seasonal process that captures stores and uses water in an ambient temperature-dependent manner to improve the efficiency of a natural gas power plant, comprising: (a) providing a natural gas power plant, the natural gas power plant having a flue gas stream, a cooling tower, and a gas turbine; (b) providing a water collection system; (c) providing a water storage facility; wherein the flue gas stream comprises uncondensed water vapor; wherein the water collection system is operably connected to the flue gas stream and the flue gas stream is directed to flow, at least in part, into the water collection system; wherein the water collection system is operably connected to the water storage facility; wherein the water storage facility is operably connected to the cooling tower and the water storage facility is operably connected to the gas turbine; wherein the process comprises the following steps of condensing flue gas water or using water that has been condensed from the flue gas stream based on outdoor ambieType: GrantFiled: May 8, 2016Date of Patent: March 27, 2018Assignee: TDA Research, Inc.Inventors: Girish Srinivas, Steven Charles Gebhard, Robert James Copeland, David P. Eisenberg
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Patent number: 9823134Abstract: A decoupling radiant and convective heat sensing device, and a decoupling radiant and convective heat sensing device with a means for performing calculations and then determining a heat flux and an ambient temperature using formulas or reference tables, and also with a means for alerting a person of hazardous fire conditions based on a calculated heat flux and ambient temperature.Type: GrantFiled: October 24, 2014Date of Patent: November 21, 2017Assignee: TDA Research, Inc.Inventors: Girish Srinivas, Michael Karpuk, Steven Gebhard, Joe Fredrickson
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Patent number: 9635889Abstract: The present invention relates to a cooling garment, comprising: a moisture-wicking under layer; and an impermeable outer layer, wherein the impermeable outer layer is attached to the moisture-wicking under layer forming at least one channel within the garment having a wetted perimeter of at most 5 inches; and an above ambient pressure gas supply operably attached to the channel. The present invention also relates to the cooling shirt or vest garment, comprising: a moisture-wicking under layer and an impermeable outer layer, wherein the outer layer is attached to the under layer forming a plurality of channels.Type: GrantFiled: March 14, 2014Date of Patent: May 2, 2017Assignee: TDA Research, Inc.Inventors: Robert James Copeland, Girish Srinivas, John David Wright, Steven Charles Gebhard
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Patent number: 9597532Abstract: A wearable breathing apparatus includes a thermal capacitor that a user inhales and exhales through. Inhaled air is cooled as it passes through the thermal capacitor, and exhaled air cools the material of the thermal capacitor for the next breathing cycle. The breathing apparatus may be used by a firefighter, for example, as a lightweight apparatus to enable the firefighter to safely breathe dangerously heated air, for example while in a fire shelter, that may otherwise cause injury to the user. The breathing apparatus advantageously does not require external power for cooling. The thermal capacitor may also be used as a part of a rebreather that uses a scrubber that removes carbon dioxide from exhaled air, for rebreathing. Further, the thermal capacitor may be used for other purposes, such as in recirculation of building air.Type: GrantFiled: June 7, 2013Date of Patent: March 21, 2017Assignee: TDA Research, Inc.Inventors: John David Wright, Robert James Copeland, Girish Srinivas, Steven Charles Gebhard, Michael Edward Karpuk
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Publication number: 20140360500Abstract: A wearable breathing apparatus includes a thermal capacitor that a user inhales and exhales through. Inhaled air is cooled as it passes through the thermal capacitor, and exhaled air cools the material of the thermal capacitor for the next breathing cycle. The breathing apparatus may be used by a firefighter, for example, as a lightweight apparatus to enable the firefighter to safely breathe dangerously heated air, for example while in a fire shelter, that may otherwise cause injury to the user. The breathing apparatus advantageously does not require external power for cooling. The thermal capacitor may also be used as a part of a rebreather that uses a scrubber that removes carbon dioxide from exhaled air, for rebreathing. Further, the thermal capacitor may be used for other purposes, such as in recirculation of building air.Type: ApplicationFiled: June 7, 2013Publication date: December 11, 2014Inventors: John David Wright, Robert James Copeland, Girish Srinivas, Steven Charles Gebhard, Michael Edward Karpuk
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Patent number: 8758718Abstract: Improved catalysts for oxidation of sulfur dioxide which are alkali metal-promoted vanadium catalysts which are further promoted by gold. Improved methods employing such catalyst for oxidation of sulfur dioxide and for manufacture of sulfuric acid. Improved methods for multiple step oxidation of sulfur dioxide in which the last oxidation step is carried out employing improved catalysts of this invention at temperatures lower than 400° C.Type: GrantFiled: October 29, 2010Date of Patent: June 24, 2014Assignee: TDA Research, Inc.Inventors: Girish Srinivas, Steven C. Gebhard
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Publication number: 20130336876Abstract: Improved catalysts for oxidation of sulfur dioxide which are alkali metal-promoted vanadium catalysts which are further promoted by gold. Improved methods employing such catalyst for oxidation of sulfur dioxide and for manufacture of sulfuric acid. Improved methods for multiple step oxidation of sulfur dioxide in which the last oxidation step is carried out employing improved catalysts of this invention at temperatures lower than 400° C.Type: ApplicationFiled: October 29, 2010Publication date: December 19, 2013Inventors: Girish Srinivas, Steven C. Gebhard
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Patent number: 7060233Abstract: A process for removing hydrogen sulfide, other sulfur-containing compounds and/or sulfur and mercury from a gas stream contaminated with mercury, hydrogen sulfide or both. The method comprises the step of selective oxidation of hydrogen sulfide (H2S) in a gas stream containing one or more oxidizable components other than H2S to generate elemental sulfur (S) or a mixture of sulfur and sulfur dioxide (SO2). The sulfur generated in the gas stream reacts with mercury in the gas stream to generate mercuric sulfide and sulfur and mercuric sulfide are removed from the gas stream by co-condensation.Type: GrantFiled: November 19, 2003Date of Patent: June 13, 2006Assignee: TDA Research, Inc.Inventors: Girish Srinivas, Robert J. Copeland
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Publication number: 20040158113Abstract: A process for alkylation of olefin-containing gases with low molecular weight branched alkanes to generate alkylate. The process involves the use of solid acid catalysts as alkylation catalysts. In a specific embodiment, the process employs a three-phase catalytic reactor where olefins present in the gas are reacted, preferably to extinction, with a large excess of liquid branched alkane.Type: ApplicationFiled: February 6, 2003Publication date: August 12, 2004Inventors: Girish Srinivas, Steven Charles Gebhard, Theodore Sidney Hoover
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Publication number: 20030194366Abstract: The invention relates to catalysts and catalytic methods for selective oxidation of hydrogen sulfide (H2S) in a gas stream containing one or more oxidizable components other than H2S to generate sulfur dioxide (SO2), elemental sulfur (S) or both without substantial oxidation of the one or more oxidizable components other than H2S. The catalysts and methods herein are useful, for example, for the selective oxidation of H2S to SO2, sulfur or both in the presence of hydrocarbons, hydrocarbon oxygenate, sulfur-containing organic compounds, aromatic hydrocarbons, aliphatic hydrocarbons, carbon dioxide, hydrogen or carbon monoxide.Type: ApplicationFiled: February 3, 2003Publication date: October 16, 2003Inventors: Girish Srinivas, Steven Charles Gebhard, Michael E. Karpuk