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).

  • Publication number: 20150228991
    Abstract: An electrochemical cell system and a process for operating the same, the system having at least two fuel electrodes for receiving electrodeposited metal fuel; at least one oxidant electrode spaced apart from the fuel electrode; at least one charging electrode; an ionically conductive medium communicating the electrodes of the electrochemical cell system for conducting ions to support electrochemical reactions at the fuel, oxidant, and charging electrodes; and, one or more controllers configured to operate the cell system in discharging and charging modes and monitor a state of charge for each fuel electrode. The controllers may assign each fuel electrode in a discharging unit having a state-of-charge meeting a predetermined depletion criteria from the discharging unit to the charging unit, and each fuel electrode in the charging unit having a state-of-charge meeting a predetermined loading criteria from the charging unit to the discharging unit.
    Type: Application
    Filed: February 11, 2015
    Publication date: August 13, 2015
    Inventors: Cody A. Friesen, Joel Hayes, Sergey Puzhaev, Ramkumar Krishnan, Todd Trimble
  • Patent number: 9105910
    Abstract: An electrochemical cell system is configured to utilize an ionically conductive medium flowing through a plurality of electrochemical cells. One or more disperser chambers are provided to disrupt or minimize electrical current flowing between the electrochemical cells, such as between the cathode of one cell and the anode of a subsequent cell by dispersing the ionically conductive medium. Air is introduced into the disperser chamber to prevent the formation of foamed ionically conductive medium, which may reconnect the dispersed ionically conductive medium, allowing the current to again flow therethrough.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: August 11, 2015
    Assignee: FLUIDIC, INC.
    Inventors: Cody A. Friesen, Ramkumar Krishnan, Michael John Mihalka, Joel R. Hayes, Grant Friesen
  • Patent number: 9105946
    Abstract: An electrochemical cell includes a fuel electrode configured to operate as an anode to oxidize a fuel when connected to a load. The cell also includes an oxidant electrode configured to operate as a cathode to reduce oxygen when connected to the load. The fuel electrode comprises a plurality of scaffolded electrode bodies. The present invention relates to an electrochemical cell system and method of resetting the electrochemical cell by applying a charge (i.e. voltage or current) to the cell to drive oxidation of the fuel, wherein the fuel electrode operates as an anode, and the second cell operates as a cathode, removing uneven distributions of fuel that may cause premature shorting of the electrode bodies to improve capacity, energy stored, and cell efficiency.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: August 11, 2015
    Assignee: FLUIDIC, INC.
    Inventors: Cody A. Friesen, Ramkumar Krishnan, Todd Trimble, Sergey Puzhaev
  • Publication number: 20150149410
    Abstract: Publishing a document from a cloud storage and/or productivity application is described. A cloud storage and/or productivity application can include a command to publish that may be executed from a user interface to the cloud storage and/or productivity application. In response to receiving a request to publish the document through a user interface, a copy of a document to be published can be communicated to a publish service of a content delivery system. The copy of the document can be a productivity application file.
    Type: Application
    Filed: November 27, 2013
    Publication date: May 28, 2015
    Applicant: Microsoft Corporation
    Inventors: ANDREW C. HAON, SOHAIL TARIQ, ROU-PENG HUANG, LUCIANA SILVA DANTAS, LAUREN ELIZABETH ANN JAVOR, DANIEL J. RONEY, RAMKUMAR KRISHNAN, MARK ALLAN HOPWOOD, ULZIIDELGER LOBO
  • Publication number: 20150143177
    Abstract: An analysis module is configured to receive data associated with an event flow. The data is received from a first analysis module (e.g., in a stack of analysis modules) or from the event flow. The analysis module is configured to execute an analysis operation on the data to generate a result. The analysis module can output the result to a second analysis module (e.g., in the stack of analysis modules) or to a user interface.
    Type: Application
    Filed: January 22, 2015
    Publication date: May 21, 2015
    Inventors: Olivier Nano, Ivo Jose Garcia dos Santos, Tihomir Tarnavski, Sebastien Peray, Marcel Tilly, Ramkumar Krishnan
  • Publication number: 20150142859
    Abstract: The publishing and distribution of productivity documents to collections are described. Document collections distribution and publishing can be facilitated by a service that receives documents to publish and stores the documents at a storage of the service. The documents can be stored in the file formats they were created in, including productivity application file formats such as word processing file format and presentation file format. The service also stores metadata associated with each document, including a collection identifier that identifies each collection that a document is added to. The documents and the collections to which the documents may be associated with are searchable and discoverable through the service.
    Type: Application
    Filed: November 18, 2013
    Publication date: May 21, 2015
    Applicant: Microsoft Corporation
    Inventors: ANDREW C. HAON, SOHAIL TARIQ, ROU-PENG HUANG, LUCIANA SILVA DANTAS, LAUREN ELIZABETH ANN JAVOR, DANIEL J. RONEY, RAMKUMAR KRISHNAN, MARK ALLAN HOPWOOD, ULZIIDELGER LOBO
  • Publication number: 20150104679
    Abstract: A process for conditioning an electrochemical cell system comprising at least two electrochemical cells comprises selecting from the fuel electrodes of the electrochemical cells groups comprising: a charged group and a reset group. The process also comprises holding the fuel electrodes within the charged group at a predetermined state of charge associated with a set concentration of metal fuel ions in solution in the ionically conductive medium. The process further comprises resetting the fuel electrodes within the reset group. An electrochemical cell system includes a plurality of fuel electrodes and one or more controllers configured to regulate the concentration of reducible metal fuel ions in solution with an ionically conductive medium by maintaining a predetermined state of charge of at least one of the fuel electrodes, and initiate a charging, discharging, or resetting process on at least one other fuel electrode. Other features and embodiments are also disclosed.
    Type: Application
    Filed: October 13, 2014
    Publication date: April 16, 2015
    Inventors: Todd TRIMBLE, Sergey PUZHAEZ, Joel HAYES, Ramkumar KRISHNAN, Cody A. FRIESEN
  • Patent number: 8949210
    Abstract: Methods, systems, and computer-readable media to analyze a CEP query are disclosed. A particular analysis module is configured to receive data associated with an event flow generated by execution of a CEP query. The data is received from a first analysis module (e.g., in a stack of analysis modules) or from the event flow via a software communication interface. The analysis module is also configured to execute an analysis operation on the data to generate a result. The analysis module can output the result to a second analysis module (e.g., in the stack of analysis modules) or to a user interface via the software communication interface.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: February 3, 2015
    Assignee: Microsoft Corporation
    Inventors: Olivier Nano, Ivo José Garcia dos Santos, Tihomir Tarnavski, Sebastien Peray, Marcel Tilly, Ramkumar Krishnan
  • Publication number: 20150030941
    Abstract: 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: Application
    Filed: October 2, 2014
    Publication date: January 29, 2015
    Inventors: Cody A. FRIESEN, Ramkumar Krishnan, Grant Friesen, Joel Hayes
  • Patent number: 8911910
    Abstract: One aspect of the present invention provides an electrochemical cell system comprising at least one electrochemical cell configured to be connected to a power supply to recharge the cell. The electrochemical cell system comprises a plurality of electrodes and electrode bodies therein. The electrochemical cell system further comprises a switching system configured to permit modifications of the configuration of anodes and cathodes during charging of the electrochemical cell, and a controller configured to control the switching system. The controller is configured to selectively apply the electrical current to a different number of said electrode bodies based on at least one input parameter so as to adjust a rate and density of the growth of the electrodeposited metal fuel.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: December 16, 2014
    Assignee: Fluidic, Inc.
    Inventors: Ramkumar Krishnan, Cody A. Friesen
  • Patent number: 8906563
    Abstract: 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: Grant
    Filed: June 25, 2012
    Date of Patent: December 9, 2014
    Assignee: Fluidic, Inc.
    Inventors: Cody A Friesen, Ramkumar Krishnan, Grant Friesen, Joel Hayes
  • Patent number: 8808929
    Abstract: An electrochemical cell comprising an electrolyte comprising water and a hydrophobic ionic liquid comprising positive ions and negative ions. The electrochemical cell also includes an air electrode configured to absorb and reduce oxygen. A hydrophilic or hygroscopic additive modulates the hydrophobicity of the ionic liquid to maintain a concentration of the water in the electrolyte is between 0.001 mol % and 25 mol %.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: August 19, 2014
    Inventors: Cody A. Friesen, Ramkumar Krishnan, Toni Tang, Derek Wolfe
  • Publication number: 20140091631
    Abstract: A system includes a boost converter configured to amplify input voltage received from one or more power sources into output voltage. The system also includes a current sensor configured to sense a current of the input voltage for example, by induction. The system further includes a controller configured to adjust an amplification of the boost converter in response to the current sensed by the current sensor. When utilized in each of a plurality of power source modules coupled to a common load, the power source modules adjust the amplifications of their boost converters towards equalization of their output voltages and their currents in response to sensed currents of the input voltages changing through demand of the common load. Associated systems and methods are also disclosed.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 3, 2014
    Applicant: FLUIDIC, INC.
    Inventors: Mark NADEN, Ramkumar Krishnan
  • Publication number: 20140061424
    Abstract: An isolation system includes a platform, a plurality of isolators for the platform electronically switchable between a soft mode of isolation resulting in a first natural frequency and a stiff mode of isolation resulting in a second natural frequency, and a controller responsive to a signal representing the frequency of a machine on the platform and configured to switch the isolator to the stiff mode of operation when the frequency of the machine approaches or reaches, the first natural frequency to avoid resonance magnification, and otherwise switch the isolation to the soft mode of operation.
    Type: Application
    Filed: August 30, 2012
    Publication date: March 6, 2014
    Inventors: Darren Chao, Hamid Shaidani, Ramkumar Krishnan
  • Publication number: 20140061423
    Abstract: A fast response, dual stiffness mode isolator including a flexible diaphragm for an isolation piston, a first chamber supporting the flexible diaphragm, a second chamber serving as a reservoir, and a valve connected to a supply, to the first chamber, and to the second chamber and operable to by-pass the second chamber to more quickly direct the supply to the first chamber.
    Type: Application
    Filed: August 30, 2012
    Publication date: March 6, 2014
    Inventors: Darren Chao, Hamid Shaidani, Ramkumar Krishnan
  • Patent number: 8659268
    Abstract: An electrochemical cell includes a fuel electrode configured to operate as an anode to oxidize a fuel when connected to a load, and configured to operate as a cathode when connected to a power supply. The fuel electrode comprises a plurality of scaffolded electrode bodies, wherein the scaffolded electrode bodies are of varying size. The electrode bodies are of a larger size at positions distal from a charging electrode configured to act as an anode when connected to the power supply, and of a smaller size at positions proximal to the charging electrode. When connected to a load, the scaffolded electrode bodies-containing fuel electrode acts as the electrochemical cell anode and electrodeposited fuel is oxidized.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: February 25, 2014
    Assignee: Fluidic, Inc.
    Inventors: Ramkumar Krishnan, Grant Friesen, Cody A. Friesen
  • Patent number: 8658318
    Abstract: The present invention relates to an electrochemical cell for generating electrical power that includes an anode, a cathode, a charging electrode and an ionically conductive medium containing at least metal fuel ions and an additive for enhancing at least one electrochemical reaction in the cell. The cell also includes an additive sorbent material in contact with the ionically conductive medium that contains an excess amount of the additive, the sorbent material configured to release the excess additive to the ionically conductive medium as concentration of the additive in the ionically conductive medium is reduced during operation of the cell.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: February 25, 2014
    Assignee: Fluidic, Inc.
    Inventors: Cody A. Friesen, Ramkumar Krishnan, Todd Trimble, Sergey Puzhaev
  • Patent number: 8632921
    Abstract: An electrochemical cell includes a first electrode configured to operate as an anode to oxidize a fuel when connected to a load. The first electrode includes a permeable electrode body configured to allow flow of an ionically conductive medium therethrough. An electrode holder includes a cavity for holding the first electrode. A diffuser is positioned in the cavity between the first electrode and the electrode holder with a gap formed between the diffuser and the electrode holder. The diffuser includes openings configured to allow flow of the ionically conductive medium therethrough and to distribute the flow through the first electrode. A second electrode is positioned in the cavity on a side of the first electrode that is opposite the diffuser, and is configured to operate as a cathode when connected to the load and in contact with the ionically conductive medium.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: January 21, 2014
    Assignee: Fluidic, Inc.
    Inventors: Cody A. Friesen, Grant Friesen, Ramkumar Krishnan, Todd Trimble
  • Patent number: 8492052
    Abstract: An electrochemical cell includes a fuel electrode configured to operate as an anode to oxidize a fuel when connected to a load. An electrode holder includes a cavity for holding the fuel electrode, at least one inlet connected to the cavity on one side of the cavity and configured to supply an ionically conductive medium to the cavity, and at least one outlet connected to the cavity on an opposite side of the cavity and configured to allow the ionically conductive medium to flow out of the cavity. A plurality of spacers extend across the fuel electrode and the cavity in a spaced relation from each other to define a plurality of flow lanes in the cavity.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: July 23, 2013
    Assignee: Fluidic, Inc.
    Inventors: Cody A Friesen, Ramkumar Krishnan, Grant Friesen
  • Publication number: 20130115532
    Abstract: 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: Application
    Filed: June 25, 2012
    Publication date: May 9, 2013
    Applicant: Fluidic, Inc.
    Inventors: Cody A FRIESEN, Ramkumar KRISHNAN, Grant FRIESEN, Joel HAYES