Patents by Inventor Champak Das

Champak Das 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: 20230277710
    Abstract: An air sanitizing system is provided. The air sanitizing system includes a dispensing device configured to dispense a sanitizing composition into liquid particles and vapor. The air sanitizing system also includes a fan that is configured to disperse the vapor of sanitizing composition into the air. The air sanitizing system includes a filtering device configured to remove at least a portion of the liquid particles.
    Type: Application
    Filed: March 1, 2023
    Publication date: September 7, 2023
    Inventors: Dana Paul GRUENBACHER, Julie Ann O'NEIL, Champak DAS, Thomas Paul HARTRANFT, Michael Robert EIDELL
  • Publication number: 20230277714
    Abstract: A method of treating the air with a sanitizing composition is provided. The method includes dispensing a sanitizing composition in the form of liquid particles and vapor from a dispensing device; circulating the vapor into the air; removing at least a portion of the liquid particles dispensed from the dispensing device; and reducing the level of airborne microorganisms in the air.
    Type: Application
    Filed: March 1, 2023
    Publication date: September 7, 2023
    Inventors: Dana Paul GRUENBACHER, Julie Ann O'NEIL, Champak DAS, Thomas Paul HARTRANFT, Michael Robert EIDELL
  • Patent number: 10576201
    Abstract: A valve for use in connection with microfluidic devices includes a safety feature such that flow is controlled even in the case of a loss of power, thus having applications in critical applications such as the precise delivery of drugs overtime. The valve may be used in connection with multiple tubes delivering drugs, and may be used with a pump, such as an electrochemical pump, to provide the force to move the fluids containing drugs for delivery. In certain applications, more than one medicine may be delivered and metered independently using a single pump with multiple reservoirs and valves.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: March 3, 2020
    Assignee: SFC Fluidics, Inc.
    Inventors: Forrest W. Payne, Greg Lamps, Champak Das, Sai Kumar, Ashley Shemain
  • Publication number: 20190290842
    Abstract: A valve for use in connection with microfluidic devices includes a safety feature such that flow is controlled even in the case of a loss of power, thus having applications in critical applications such as the precise delivery of drugs over time. The valve may be used in connection with multiple tubes delivering drugs, and may be used with a pump, such as an electrochemical pump, to provide the force to move the fluids containing drugs for delivery. In certain applications, more than one medicine may be delivered and metered independently using a single pump with multiple reservoirs and valves.
    Type: Application
    Filed: June 10, 2019
    Publication date: September 26, 2019
    Inventors: Forrest W. Payne, Greg Lamps, Champak Das, Sai Kumar, Ashley Shemain
  • Publication number: 20170224918
    Abstract: A valve for use in connection with microfluidic devices includes a safety feature such that flow is controlled even in the case of a loss of power, thus having applications in critical applications such as the precise delivery of drugs overtime. The valve may be used in connection with multiple tubes delivering drugs, and may be used with a pump, such as an electrochemical pump, to provide the force to move the fluids containing drugs for delivery. In certain applications, more than one medicine may be delivered and metered independently using a single pump with multiple reservoirs and valves.
    Type: Application
    Filed: August 14, 2015
    Publication date: August 10, 2017
    Inventors: Forrest W. Payne, Greg Lamps, Champak Das, Sai Kumar, Ashley Shemain
  • Publication number: 20150258273
    Abstract: Electrochemical actuation is disclosed for fluid movement and flow control in microfluidic devices, allowing for miniaturization, minimal power requirements, single-use disposability and engineering of small, complex fluidic networks. In one embodiment, a single-dose fluid delivery device is operable to deliver a bolus dose, in a single extended stroke or in multiple repeated doses. The device uses three electrochemically-actuated chambers, two of the chambers operating as inlet/outlet valves for the device and a third providing both a temporary containment and pumping action. By sequential manipulation of the fluid pressure in the three chambers, fluids may be delivered in precise quantities by the device.
    Type: Application
    Filed: August 29, 2012
    Publication date: September 17, 2015
    Inventors: Forrest W. Payne, Sai Ramamurthy Kumar, Christine E. Evans, Anna Washburn, Andy M. Dunn, Brian Young, Joe Bruton, Champak Das, Kavita M. Jeerage, Carl A. Koval, Richard D. Noble
  • Publication number: 20150224499
    Abstract: An automated assay platform for determining the presence and/or amount of analytes of interest in a sample at point of care integrates microfluidic enhanced assay sites, disposable cartridge designs, a sensitive low-volume detection module, together with selected pumping and valving modules, customized control board and user friendly graphical user interface (GUI). Comparing to traditional assay platform like 96-well ELISA, the platform is capable of reducing reagent consumption, increasing assay speed, and enhancing assay performance with a sample-in-answer-out automated process. This platform also features flexibility of adapting different assay schemes for different analytes.
    Type: Application
    Filed: February 13, 2015
    Publication date: August 13, 2015
    Inventors: Guochun Wang, Champak Das, Bradley Ledden, Qian Sun, Chien Nguyen, Sai Kumar
  • Patent number: 8186026
    Abstract: A technique for maintaining secure network connections is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for maintaining secure network connections. The method may comprise detecting a change of address associated with a first network element. The method may also comprise updating at least one first security configuration at the first network element. The method may further comprise transmitting at least one secure message from the first network element to a second network element, wherein the at least one secure message comprises information associated with the change of address. And the method may comprise updating at least one second security configuration at the second network element based at least in part on the at least one secure message.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: May 29, 2012
    Assignee: Rockstar Bidco, LP
    Inventors: Jing Xiang, Shreedhar Shirgurkar, Vladimir Senkov, Champak Das
  • Patent number: 7751835
    Abstract: In a radio access network, techniques for defining a non-circular paging area in which an access terminal is to be paged based on distance-based location updating information for a sector of the network.
    Type: Grant
    Filed: October 4, 2005
    Date of Patent: July 6, 2010
    Assignee: Airvana, Inc.
    Inventors: Vivek Sharma, Prasasth R. Palnati, Rajeev Chawla, Arthur J. Barabell, Champak Das
  • Publication number: 20070077948
    Abstract: In a radio access network, techniques for defining a non-circular paging area in which an access terminal is to be paged based on distance-based location updating information for a sector of the network.
    Type: Application
    Filed: October 4, 2005
    Publication date: April 5, 2007
    Inventors: Vivek Sharma, Prasasth Palnati, Rajeev Chawla, Arthur Barabell, Champak Das
  • Publication number: 20050198691
    Abstract: A technique for maintaining secure network connections is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for maintaining secure network connections. The method may comprise detecting a change of address associated with a first network element. The method may also comprise updating at least one first security configuration at the first network element. The method may further comprise transmitting at least one secure message from the first network element to a second network element, wherein the at least one secure message comprises information associated with the change of address. And the method may comprise updating at least one second security configuration at the second network element based at least in part on the at least one secure message.
    Type: Application
    Filed: March 3, 2004
    Publication date: September 8, 2005
    Inventors: Jing Xiang, Shreedhar Shirgurkar, Vladimir Senkov, Champak Das
  • Patent number: RE46113
    Abstract: A technique for maintaining secure network connections is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for maintaining secure network connections. The method may comprise detecting a change of address associated with a first network element. The method may also comprise updating at least one first security configuration at the first network element. The method may further comprise transmitting at least one secure message from the first network element to a second network element, wherein the at least one secure message comprises information associated with the change of address. And the method may comprise updating at least one second security configuration at the second network element based at least in part on the at least one secure message.
    Type: Grant
    Filed: May 29, 2014
    Date of Patent: August 16, 2016
    Assignee: RPX CLEARINGHOUSE LLC
    Inventors: Jing Xiang, Shreedhar Shirgurkar, Vladimir Senkov, Champak Das