Patents by Inventor Ramkumar Krishnan
Ramkumar Krishnan 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: 20240097481Abstract: A stationary hybrid battery back-up system incorporates two different battery units that differ in terms of recharging efficiency, cycle life, power capability, depth of discharge threshold, temperature threshold, internal impedance threshold, charger rate efficiency and/or stand-by efficiency. The battery back-up system of the present invention comprises an auxiliary power supply that can be used to charge the first and second batteries and/or provide power to a load. When the operating voltage of the system drops, due to a power failure of a power source, the control system may couple the first and/or second battery unit to a load. The control system may have voltage threshold limits wherein it engages the first and second battery units to support the load demand. The first and second battery units may be charge by the auxiliary power supply when the operating voltage is above a threshold level.Type: ApplicationFiled: April 26, 2023Publication date: March 21, 2024Inventors: Ramkumar KRISHNAN, Shawn FINK
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Patent number: 11923568Abstract: A fuel electrode incorporates a first and second corrugated portion that are attached to each other at offset angles respect to their corrugation axis and therefore reinforce each other. A first corrugated portion may extend orthogonally with respect to a second corrugated portion. The first and second corrugated portions may be formed from metal wire and may therefore have a very high volumetric void fraction and a high surface area to volume ratio (sa/vol). In addition, the strands of the wire may be selected to enable high conductivity to the current collectors while maximizing the sa/vol. In addition, the shape of the corrugation, including the period distance, amplitude and geometry may be selected with respect to the stiffness requirements and electrochemical cell application factors. The first and second corrugated portions may be calendared or crushed to reduce thickness of the fuel electrode.Type: GrantFiled: May 13, 2022Date of Patent: March 5, 2024Assignee: FORM ENERGY, INC.Inventors: Joel Ryan Hayes, Ramkumar Krishnan, Todd Trimble, Clifford Anderson
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Publication number: 20240047786Abstract: An electrochemical cell utilizes an air flow device that draws air through the cell from a scrubber that may be removed while the system is operating. The negative pressure generated by the air flow device allows ambient air to enter the cell housing when the scrubber is removed, thereby enabling continued operation without the scrubber. A moisture management system passes outflow air from the cell through a humidity exchange module that transfers moisture to the air inflow, thereby increasing the humidity of the air inflow. A recirculation feature comprising a valve allow a controller to recirculate at least a portion of the outflow air back into the inflow air. The system may comprise an inflow bypass conduit and valve that allows the humidified inflow air to pass into the cell inlet without passing through the scrubber. The scrubber may contain reversible or irreversible scrubber media.Type: ApplicationFiled: April 10, 2023Publication date: February 8, 2024Inventors: Ramkumar KRISHNAN, Joel HAYES, Shawn FINK, Scott KLUG, Patrick SAMUELSON
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Patent number: 11736781Abstract: Aspects of the present disclosure reduce visual artifacts and provide robust video signals to end-user equipment. According to an aspect, a system includes a splice point controller that analyzes video to detect and compensate for content boundary misalignments. The splice point controller can process video streams by analyzing splice point parameters and/or dynamically updating adjustment values associated with splice points to ensure appropriate transitions from primary content to secondary or alternate content. After determining an adjustment value for a splice point, the splice point controller can provide splice point adjustment feedback to a signal processing engine and/or to a secondary content source as part of synchronizing outputs of a transcoder farm and/or the secondary content source. For example, the splice point controller can operate to align a splice point adjustment value associated with an SCTE-35 descriptor with an actual live splice point time that is included with a live broadcast.Type: GrantFiled: April 18, 2022Date of Patent: August 22, 2023Assignee: Cox Communications, Inc.Inventors: Ray Killick, Jayasri Devalapalli, Muhammad Asif Raza, Ramkumar Krishnan
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Patent number: 11670954Abstract: A stationary hybrid battery back-up system incorporates two different battery units that differ in terms of recharging efficiency, cycle life, power capability, depth of discharge threshold, temperature threshold, internal impedance threshold, charger rate efficiency and/or stand-by efficiency. The battery back-up system of the present invention comprises an auxiliary power supply that can be used to charge the first and second batteries and/or provide power to a load. When the operating voltage of the system drops, due to a power failure of a power source, the control system may couple the first and/or second battery unit to a load. The control system may have voltage threshold limits wherein it engages the first and second battery units to support the load demand. The first and second battery units may be charge by the auxiliary power supply when the operating voltage is above a threshold level.Type: GrantFiled: September 13, 2017Date of Patent: June 6, 2023Assignee: FORM ENERGY, INC.Inventors: Ramkumar Krishnan, Shawn Fink
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Patent number: 11664547Abstract: An electrochemical cell utilizes an air flow device that draws air through the cell from a scrubber that may be removed while the system is operating. The negative pressure generated by the air flow device allows ambient air to enter the cell housing when the scrubber is removed, thereby enabling continued operation without the scrubber. A moisture management system passes outflow air from the cell through a humidity exchange module that transfers moisture to the air inflow, thereby increasing the humidity of the air inflow. A recirculation feature comprising a valve allow a controller to recirculate at least a portion of the outflow air back into the inflow air. The system may comprise an inflow bypass conduit and valve that allows the humidified inflow air to pass into the cell inlet without passing through the scrubber. The scrubber may contain reversible or irreversible scrubber media.Type: GrantFiled: April 30, 2021Date of Patent: May 30, 2023Assignee: FORM ENERGY, INC.Inventors: Ramkumar Krishnan, Joel Hayes, Shawn Fink, Scott Klug, Patrick Samuelson
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Publication number: 20220344677Abstract: A fuel electrode incorporates a first and second corrugated portion that are attached to each other at offset angles respect to their corrugation axis and therefore reinforce each other. A first corrugated portion may extend orthogonally with respect to a second corrugated portion. The first and second corrugated portions may be formed from metal wire and may therefore have a very high volumetric void fraction and a high surface area to volume ratio (sa/vol). In addition, the strands of the wire may be selected to enable high conductivity to the current collectors while maximizing the sa/vol. In addition, the shape of the corrugation, including the period distance, amplitude and geometry may be selected with respect to the stiffness requirements and electrochemical cell application factors. The first and second corrugated portions may be calendared or crushed to reduce thickness of the fuel electrode.Type: ApplicationFiled: May 13, 2022Publication date: October 27, 2022Inventors: Joel Ryan HAYES, Ramkumar KRISHNAN, Todd TRIMBLE, Clifford ANDERSON
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Patent number: 11399211Abstract: This disclosure describes systems, methods, and devices related to network resource management and content delivery. A method may include a first device determining a first bandwidth demand associated with a second device sending a first addressable advertisement using a data over cable service interface specification (DOCSIS) bandwidth using a first advertisement spot for a first linear segment addressability (LSA) television channel, and determining a second bandwidth demand associated with the second device sending a second addressable advertisement using the DOCSIS bandwidth for presentation using a second advertisement spot. The method may include determining that the first bandwidth demand is below a threshold bandwidth, and determining that the second bandwidth demand exceeds the threshold bandwidth.Type: GrantFiled: October 28, 2020Date of Patent: July 26, 2022Assignee: Cox Communications, Inc.Inventors: Ray Killick, Ramkumar Krishnan, Jayasri Devalapalli, Muhammad Raza
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Patent number: 11335918Abstract: A fuel electrode incorporates a first and second corrugated portion that are attached to each other at offset angles respect to their corrugation axis and therefore reinforce each other. A first corrugated portion may extend orthogonally with respect to a second corrugated portion. The first and second corrugated portions may be formed from metal wire and may therefore have a very high volumetric void fraction and a high surface area to volume ratio (sa/vol). In addition, the strands of the wire may be selected to enable high conductivity to the current collectors while maximizing the sa/vol. In addition, the shape of the corrugation, including the period distance, amplitude and geometry may be selected with respect to the stiffness requirements and electrochemical cell application factors. The first and second corrugated portions may be calendared or crushed to reduce thickness of the fuel electrode.Type: GrantFiled: October 20, 2017Date of Patent: May 17, 2022Assignee: FORM ENERGY, INC.Inventors: Joel Ryan Hayes, Ramkumar Krishnan, Todd Trimble, Clifford Anderson
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Publication number: 20220132206Abstract: This disclosure describes systems, methods, and devices related to network resource management and content delivery. A method may include a first device determining a first bandwidth demand associated with a second device sending a first addressable advertisement using a data over cable service interface specification (DOCSIS) bandwidth using a first advertisement spot for a first linear segment addressability (LSA) television channel, and determining a second bandwidth demand associated with the second device sending a second addressable advertisement using the DOCSIS bandwidth for presentation using a second advertisement spot. The method may include determining that the first bandwidth demand is below a threshold bandwidth, and determining that the second bandwidth demand exceeds the threshold bandwidth.Type: ApplicationFiled: October 28, 2020Publication date: April 28, 2022Applicant: Cox Communications, Inc.Inventors: Ray Killick, Ramkumar Krishnan, Jayasri Devalapalli, Muhammad Raza
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Publication number: 20220131213Abstract: An electrochemical cell includes a mist elimination system that prevents mist from escaping from the cell chamber and conserves moisture within the cell. An exemplary mist elimination system includes a spill prevention device that reduces or prevents an electrolyte from escaping from the cell chamber in the event of an upset, wherein the electrochemical cell is tipped over. A mist elimination system includes a recombination portion that reacts with hydrogen to produce water, that may be reintroduced into the cell chamber. A mist elimination system includes a neutralizer portion that reacts with an electrolyte to bring the pH closer to neutral, as acid/base reaction. A mist elimination system includes a filter that captures mist that may be reintroduced into the cell chamber. A mist elimination system includes a hydrophobic filter on the outer surface to prevent water and other liquids from entering into the mist elimination system.Type: ApplicationFiled: January 10, 2022Publication date: April 28, 2022Inventors: Ramkumar KRISHNAN, Joel HAYES, Scott KLUG, Patrick SAMULESON, Craig TRZEBNY
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Patent number: 11251476Abstract: Electrochemical metal-air cells having nested electrodes provided in an annular or cylindrical configuration, including systems that contain such cells in a sealed container. Each cell may include an oxidant electrode (air cathode) and a fuel electrode (anode), both configured in annular form. A series of permeable bodies, screens, or current collectors may be provided as part of the fuel electrode. An annular oxygen evolution electrode may also be provided in the cells. In some cases, the fuel electrode is nested within the oxidant electrode, or vice versa. Optionally, a second oxidant electrode may be included in the cells. Ionically conductive medium or electrolyte may be contained in the cell. Each cell may have its own cell housing. Optionally, an air space or pocket may be formed in a cell via an oxidant electrode. The sealed container may contain the cells such that they are surrounded by air or an electrolyte.Type: GrantFiled: May 7, 2020Date of Patent: February 15, 2022Assignee: FORM ENERGY, INC.Inventors: Glenn Donahey, Ramkumar Krishnan, Jagjot Singh Grewal
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Patent number: 11245143Abstract: An exemplary electrochemical cell incorporates at least a first battery electrode, such as a zinc electrode, at least a second battery electrode, such as a reversible metal electrode such as nickel, and at least an oxidant reduction electrode, such as an air cathode. The oxidant reduction electrode(s) is configured in a cell housing such that it is essentially orthogonal to the first and second electrodes. The cell housing contains electrolyte therein and the electrodes are immersed, at least partially, in the electrolyte. The positioning of the oxidant reduction electrode(s) on the side of the cell and relatively perpendicular to the first and second (metal) electrodes, allows for more consistent ionic resistance across all the metal electrodes. Optionally, a fourth or oxygen evolving electrode may be provided in the cell housing, horizontal, orthogonal, and below the first and second electrodes to provide oxygen bubbles for mixing the electrolyte.Type: GrantFiled: May 3, 2019Date of Patent: February 8, 2022Assignee: FORM ENERGY, INC.Inventors: Ramkumar Krishnan, Joel Ryan Hayes, Todd Trimble
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Patent number: 11228066Abstract: An electrochemical cell includes a mist elimination system that prevents mist from escaping from the cell chamber and conserves moisture within the cell. An exemplary mist elimination system includes a spill prevention device that reduces or prevents an electrolyte from escaping from the cell chamber in the event of an upset, wherein the electrochemical cell is tipped over. A mist elimination system includes a recombination portion that reacts with hydrogen to produce water, that may be reintroduced into the cell chamber. A mist elimination system includes a neutralizer portion that reacts with an electrolyte to bring the pH closer to neutral, as acid/base reaction. A mist elimination system includes a filter that captures mist that may be reintroduced into the cell chamber. A mist elimination system includes a hydrophobic filter on the outer surface to prevent water and other liquids from entering into the mist elimination system.Type: GrantFiled: July 24, 2017Date of Patent: January 18, 2022Assignee: FORM ENERGY, INC.Inventors: Ramkumar Krishnan, Joel Hayes, Scott Klug, Patrick Samuleson, Craig Trzebny
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Patent number: 11178444Abstract: A roaming video experience, in which users continue watching a content item when moving from viewing device to viewing device is enabled herein via Radio Frequency (RF) enabled remote controls and set top boxes. A device identifier from a first RF-enabled set top box is communicated to an active RF-enabled remote control. When a user signals a second RF-enabled set top box, the viewing session parameter set associated with the active RF-enabled remote control is passed to the second RF-enabled set top box. Using the parameter set, the second set top box is enabled to learn the system settings, user preferences, and content item that were used on the first set top box, and provide a continued viewing experience—the roaming video experience—for the user on an associated viewing device.Type: GrantFiled: May 23, 2019Date of Patent: November 16, 2021Assignee: COX COMMUNICATIONS, INC.Inventors: Ramkumar Krishnan, Muhammad Raza, Matt Munchinski, Albert Higashi
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Publication number: 20210288512Abstract: A stationary hybrid battery back-up system incorporates two different battery units that differ in terms of recharging efficiency, cycle life, power capability, depth of discharge threshold, temperature threshold, internal impedance threshold, charger rate efficiency and/or stand-by efficiency. The battery back-up system of the present invention comprises an auxiliary power supply that can be used to charge the first and second batteries and/or provide power to a load. When the operating voltage of the system drops, due to a power failure of a power source, the control system may couple the first and/or second battery unit to a load. The control system may have voltage threshold limits wherein it engages the first and second battery units to support the load demand. The first and second battery units may be charge by the auxiliary power supply when the operating voltage is above a threshold level.Type: ApplicationFiled: September 13, 2017Publication date: September 16, 2021Inventors: Ramkumar KRISHNAN, Shawn FINK
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Publication number: 20210249715Abstract: An electrochemical cell utilizes an air flow device that draws air through the cell from a scrubber that may be removed while the system is operating. The negative pressure generated by the air flow device allows ambient air to enter the cell housing when the scrubber is removed, thereby enabling continued operation without the scrubber. A moisture management system passes outflow air from the cell through a humidity exchange module that transfers moisture to the air inflow, thereby increasing the humidity of the air inflow. A recirculation feature comprising a valve allow a controller to recirculate at least a portion of the outflow air back into the inflow air. The system may comprise an inflow bypass conduit and valve that allows the humidified inflow air to pass into the cell inlet without passing through the scrubber. The scrubber may contain reversible or irreversible scrubber media.Type: ApplicationFiled: April 30, 2021Publication date: August 12, 2021Inventors: Ramkumar KRISHNAN, Joel HAYES, Shawn FINK, Scott KLUG, Patrick SAMUELSON
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Patent number: 11018387Abstract: An electrochemical cell utilizes an air flow device that draws air through the cell from a scrubber that may be removed while the system is operating. The negative pressure generated by the air flow device allows ambient air to enter the cell housing when the scrubber is removed, thereby enabling continued operation without the scrubber. A moisture management system passes outflow air from the cell through a humidity exchange module that transfers moisture to the air inflow, thereby increasing the humidity of the air inflow. A recirculation feature comprising a valve allow a controller to recirculate at least a portion of the outflow air back into the inflow air. The system may comprise an inflow bypass conduit and valve that allows the humidified inflow air to pass into the cell inlet without passing through the scrubber. The scrubber may contain reversible or irreversible scrubber media.Type: GrantFiled: July 24, 2017Date of Patent: May 25, 2021Assignee: FORM ENERGY, INC.Inventors: Ramkumar Krishnan, Joel Hayes, Shawn Fink, Scott Klug, Patrick Samuelson
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Patent number: 10910686Abstract: An electrochemical cell includes a permeable fuel electrode configured to support a metal fuel thereon, and an oxidant reduction electrode spaced from the fuel electrode. An ionically conductive medium is provided for conducting ions between the fuel and oxidant reduction electrodes, to support electrochemical reactions at the fuel and oxidant reduction electrodes. A charging electrode is also included, selected from the group consisting of (a) the oxidant reduction electrode, (b) a separate charging electrode spaced from the fuel and oxidant reduction electrodes, and (c) a portion of the permeable fuel electrode. The charging electrode is configured to evolve gaseous oxygen bubbles that generate a flow of the ionically conductive medium. One or more flow diverters are also provided in the electrochemical cell, and configured to direct the flow of the ionically conductive medium at least partially through the permeable fuel electrode.Type: GrantFiled: October 12, 2018Date of Patent: February 2, 2021Assignee: FORM ENERGY, INC.Inventors: Cody A. Friesen, Ramkumar Krishnan, Grant Friesen, Joel Hayes
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Patent number: 10843521Abstract: An apparatus and method are described where one or more pre-stressed spring elements are disposed between two structures to mitigate or cancel the effect of static loads applied to a component connecting the structures. The apparatus and methods may be used, for example, to reduce the adverse impact of static loads on the performance of top-mounts in a suspension system of a vehicle.Type: GrantFiled: August 9, 2019Date of Patent: November 24, 2020Assignee: ClearMotion, Inc.Inventors: Ramkumar Krishnan, Marco Giovanardi