Patents by Inventor Kalyan Das

Kalyan 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).

  • Patent number: 11374188
    Abstract: A photovoltaic cell includes a substrate layer, an anode layer on the substrate layer, an active layer on the anode layer, and a cathode layer on the active layer, wherein the active layer comprises a plurality of disparately sized n-type and p-type nano-particles of different semiconductor materials randomly distributed in a conductive polymer blend. The n-type nano-particles can include either ZnO or In2O3 nano-particles, and the p-type nano-particles can include either NiO or La2O3 nano-particles. The conductive polymer blend can include P3HT. The bandgaps of the nano-particles have corresponding energies ranging from the near ultraviolet to the far infrared.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: June 28, 2022
    Assignee: Tuskegee University
    Inventors: Naga Korivi, Kalyan Das
  • Publication number: 20200144524
    Abstract: A photovoltaic cell includes a substrate layer, an anode layer on the substrate layer, an active layer on the anode layer, and a cathode layer on the active layer, wherein the active layer comprises a plurality of disparately sized n-type and p-type nano-particles of different semiconductor materials randomly distributed in a conductive polymer blend. The n-type nano-particles can include either ZnO or In2O3 nano-particles, and the p-type nano-particles can include either NiO or La2O3 nano-particles. The conductive polymer blend can include P3HT. The bandgaps of the nano-particles have corresponding energies ranging from the near ultraviolet to the far infrared.
    Type: Application
    Filed: December 5, 2019
    Publication date: May 7, 2020
    Applicant: Tuskegee University
    Inventors: Naga Korivi, Kalyan Das
  • Patent number: 9932323
    Abstract: The invention provides compounds of formula I: and salts and prodrugs thereof wherein R4, X1 and X2 have any of the meanings defined in the specification, as well as pharmaceutical compositions comprising the compounds or salts and methods for their use in therapy. The compounds have useful antiviral properties.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: April 3, 2018
    Assignee: Rutgers, The State University of New Jersey
    Inventors: Edmond J. Lavoie, Joseph David Bauman, Ajit Parhi, Hye Yeon Sagong, Disha Patel, Eddy Arnold, Kalyan Das, Suyambu Kesava Vijayan
  • Publication number: 20170204083
    Abstract: The invention provides compounds of formula I: and salts and prodrugs thereof wherein R4, X1 and X2 have any of the meanings defined in the specification, as well as pharmaceutical compositions comprising the compounds or salts and methods for their use in therapy. The compounds have useful antiviral properties.
    Type: Application
    Filed: January 13, 2017
    Publication date: July 20, 2017
    Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
    Inventors: Edmond J. LAVOIE, Joseph David BAUMAN, Ajit PARHI, Hye Yeon SAGONG, Disha PATEL, Eddy ARNOLD, Kalyan DAS, Suyambu Kesava VIJAYAN
  • Patent number: 9701638
    Abstract: The invention provides compounds of formula (I) and salts thereof wherein R4-R8 have any of the meanings defined in the specification, as well as pharmaceutical compositions comprising the compounds or salts and methods for their use in therapy. The compounds have useful antiviral properties.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: July 11, 2017
    Assignee: Rutgers, The State University of New Jersey
    Inventors: Edmond J. Lavoie, Joseph David Bauman, Hye Yeon Sagong, Eddy Arnold, Ajit Parhi, Kalyan Das, Suyambu Kesava Vijayan, Disha Patel
  • Patent number: 9695135
    Abstract: The invention provides compounds of formula I: and salts thereof wherein R1-R4 have any of the meanings defined in the specification, as well as pharmaceutical compositions comprising the compounds or salts, and methods for their use in therapy. The compounds have useful antiviral properties.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: July 4, 2017
    Assignee: Rutgers, The State University of New Jersey
    Inventors: Edmond J. LaVoie, Eddy Arnold, Joseph D. Bauman, John E. Kerrigan, Ajit K. Parhi, Kalyan Das, Cody Kelley, Dishaben V. Patel
  • Patent number: 9573938
    Abstract: The invention provides compounds of formula (I): and salts and prodrugs thereof wherein R4, X1 and X2 have any of the meanings defined in the specification, as well as pharmaceutical compositions comprising the compounds or salts and methods for their use in therapy. The compounds have useful antiviral properties.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: February 21, 2017
    Assignee: Rutgers, The State University of New Jersey
    Inventors: Edmond J. Lavoie, Joseph David Bauman, Ajit Parhi, Hye Yeon Sagong, Disha Patel, Eddy Arnold, Kalyan Das, Suyambu Kesava Vijayan
  • Patent number: 9525735
    Abstract: A client requests access to a resource (e.g., a file) via a node of a storage system. The resource is stored in a directory structure. A directory in the directory structure that includes the resource and that does not have any locks that conflict with the requested access to the resource is identified and selected. A revocable access privilege (e.g., a lock) on the selected directory is awarded to the node accessed by the client, and a directory-to-node association is established. Another association between the requested resource and the node is also established. If there is a subsequent request for the resource or for another resource within that directory, then a revoke notice for the directory access privilege is sent to the node.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: December 20, 2016
    Assignee: FUTUREWEI TECHNOLOGIES, INC.
    Inventor: Kalyan Das
  • Patent number: 9336406
    Abstract: An approach to multiprotocol ACL implementation with guaranteed protocol compliance is described. In one approach, a method of access rights validation for a multiprotocol supported file server is detailed. The method involves receiving a request to store a file with a security descriptor and storing the security descriptor in an extended attribute associated with the file. Subsequently, the security descriptor is expanded to extract a set of ACEs. Access to the file can then be validated against the ACEs expanded from the security descriptor according to the specifications of the protocol that created the security descriptor.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: May 10, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventor: Kalyan Das
  • Publication number: 20160111668
    Abstract: A photovoltaic cell includes a substrate layer, an anode layer on the substrate layer, an active layer on the anode layer, and a cathode layer on the active layer, wherein the active layer comprises a plurality of disparately sized n-type and p-type nano-particles of different semiconductor materials randomly distributed in a conductive polymer blend. The n-type nano-particles can include either ZnO or In2O3 nano-particles, and the p-type nano-particles can include either NiO or La2O3 nano-particles. The conductive polymer blend can include P3HT. The bandgaps of the nano-particles have corresponding energies ranging from the near ultraviolet to the far infrared.
    Type: Application
    Filed: September 30, 2015
    Publication date: April 21, 2016
    Applicant: Tuskegee University
    Inventors: Naga Korivi, Kalyan Das
  • Patent number: 9288116
    Abstract: System and method embodiments are provided herein to test Network Attached Storage (NAS) server performance by generating a sufficient load in NAS client sessions. A test device is configured to run as many needed NAS clients to generate enough NAS session load for evaluating the NAS server performance. An embodiment comprises a method for testing a NAS server comprising starting a NAS client, establishing a session between the NAS client and the NAS server, exchanging communications for the session at a network stack layer below the NAS client, terminating the NAS client, starting a second NAS client, establishing a subsequent session between the second NAS client and the NAS server, exchanging communications for the subsequent session at the network stack layer while exchanging communications for the session, and terminating the second NAS client.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: March 15, 2016
    Assignee: Futurewei Technologies, Inc.
    Inventor: Kalyan Das
  • Publication number: 20150322022
    Abstract: The invention provides compounds of formula I: and salts thereof wherein R1-R4 have any of the meanings defined in the specification, as well as pharmaceutical compositions comprising the compounds or salts, and methods for their use in therapy. The compounds have useful antiviral properties.
    Type: Application
    Filed: May 11, 2015
    Publication date: November 12, 2015
    Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
    Inventors: Edmond J. LaVoie, Eddy Arnold, Joseph D. Bauman, John E. Kerrigan, Ajit K. Parhi, Kalyan Das, Cody Kelley, Dishaben V. Patel
  • Publication number: 20150291531
    Abstract: The invention provides compounds of formula (I) and salts thereof wherein R4-R8 have any of the meanings defined in the specification, as well as pharmaceutical compositions comprising the compounds or salts and methods for their use in therapy. The compounds have useful antiviral properties.
    Type: Application
    Filed: November 8, 2013
    Publication date: October 15, 2015
    Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
    Inventors: Edmond J. Lavoie, Joseph David Bauman, Hye Yeon Sagong, Eddy Arnold, Ajit Parhi, Kalyan Das, Suyambu Kesava Vijayan, Disha Patel
  • Patent number: 9160650
    Abstract: In a network switch of a software-defined network (SDN) architecture, a method for improving cache replacement (CR) efficiency implemented therein, the method comprising maintaining a flow table comprising a plurality of flow entries, computing a replacement index (RI) value for each of the plurality of flow entries resulting in a plurality of RI values, wherein computing an RI value for a flow entry is at least partially based on latency sensitivity of a forwarding path specified by the flow entry, and generating, based on at least some of the computed RI values, an eviction list comprising a number of list entries, wherein each of the list entries points to one of at least a fraction of the flow entries.
    Type: Grant
    Filed: June 17, 2013
    Date of Patent: October 13, 2015
    Assignee: Futurewei Technologies, Inc.
    Inventors: Hong Zhang, Kalyan Das
  • Publication number: 20150232454
    Abstract: The invention provides compounds of formula (I): and salts and prodrugs thereof wherein R4, X1 and X2 have any of the meanings defined in the specification, as well as pharmaceutical compositions comprising the compounds or salts and methods for their use in therapy. The compounds have useful antiviral properties.
    Type: Application
    Filed: September 11, 2013
    Publication date: August 20, 2015
    Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
    Inventors: Edmond J. Lavoie, Joseph David Bauman, Ajit Parhi, Hye Yeon Sagong, Disha Patel, Eddy Arnold, Kalyan Das, Suyambu Kesava Vijayan
  • Patent number: 9079944
    Abstract: The present invention includes compositions and methods related to the structure and function of the cellular polyadenylation and specificity factor 30 (CPSF30) binding site on the surface of the influenza A non-structural protein 1 (NS1). Specifically, critical biochemical reagents, conditions for crystallization and NMR analysis, assays, and general processes are described for (i) discovering, designing, and optimizing small molecule inhibitors of influenza A (avian flu) viruses and (ii) creating attenuated influenza virus strains suitable for avian and human flu vaccine development.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: July 14, 2015
    Assignees: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
    Inventors: Gaetano T. Montelione, Kalyan Das, Edward Arnold, Li-Chung Ma, Rong Xiao, Robert M. Krug, Karen Y. Twu, Rei-Lin Kuo
  • Publication number: 20150135331
    Abstract: An approach to multiprotocol ACL implementation with guaranteed protocol compliance is described. In one approach, a method of access rights validation for a multiprotocol supported file server is detailed. The method involves receiving a request to store a file with a security descriptor and storing the security descriptor in an extended attribute associated with the file. Subsequently, the security descriptor is expanded to extract a set of ACEs. Access to the file can then be validated against the ACEs expanded from the security descriptor according to the specifications of the protocol that created the security descriptor.
    Type: Application
    Filed: November 14, 2013
    Publication date: May 14, 2015
    Applicant: FUTUREWEI TECHNOLOGIES, INC.
    Inventor: Kalyan DAS
  • Publication number: 20150120925
    Abstract: A client requests access to a resource (e.g., a file) via a node of a storage system. The resource is stored in a directory structure. A directory in the directory structure that includes the resource and that does not have any locks that conflict with the requested access to the resource is identified and selected. A revocable access privilege (e.g., a lock) on the selected directory is awarded to the node accessed by the client, and a directory-to-node association is established. Another association between the requested resource and the node is also established. If there is a subsequent request for the resource or for another resource within that directory, then a revoke notice for the directory access privilege is sent to the node.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 30, 2015
    Applicant: FUTUREWEI TECHNOLOGIES, INC.
    Inventor: Kalyan DAS
  • Publication number: 20150093405
    Abstract: The present invention includes compositions and methods related to the structure and function of the cellular polyadenylation and specificity factor 30 (CPSF30) binding site on the surface of the influenza A non-structural protein 1 (NS1). Specifically, critical biochemical reagents, conditions for crystallization and NMR analysis, assays, and general processes are described for (i) discovering, designing, and optimizing small molecule inhibitors of influenza A (avian flu) viruses and (ii) creating attenuated influenza virus strains suitable for avian and human flu vaccine development.
    Type: Application
    Filed: November 17, 2014
    Publication date: April 2, 2015
    Inventors: Gaetano T. Montelione, Kalyan Das, Edward Arnold, Li-Chung Ma, Rong Xiao, Robert M. Krug, Karen Y. Twu, Rei-Lin Kuo
  • Patent number: 8954392
    Abstract: The efficiency of data de-duplication may be improved by storing related file data in a single container, or in multiple linked containers, of a history. Additionally, the efficiency of data de-duplication may be improved when shorter hash tables are used to reference historical data in a history. Shorter hash tables may be achieved by storing fewer than all the hash values obtained for a given amount of historical data. Further, the efficiency of data de-duplication may be improved by comparing related incoming file data with historical data from a container without hashing/chunking the remaining file data upon matching an earlier chunk of the incoming file data to the container.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: February 10, 2015
    Assignee: FutureWei Technologies, Inc.
    Inventor: Kalyan Das