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).
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Patent number: 11374188Abstract: 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: GrantFiled: December 5, 2019Date of Patent: June 28, 2022Assignee: Tuskegee UniversityInventors: Naga Korivi, Kalyan Das
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Publication number: 20200144524Abstract: 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: ApplicationFiled: December 5, 2019Publication date: May 7, 2020Applicant: Tuskegee UniversityInventors: Naga Korivi, Kalyan Das
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Patent number: 9932323Abstract: 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: GrantFiled: January 13, 2017Date of Patent: April 3, 2018Assignee: Rutgers, The State University of New JerseyInventors: Edmond J. Lavoie, Joseph David Bauman, Ajit Parhi, Hye Yeon Sagong, Disha Patel, Eddy Arnold, Kalyan Das, Suyambu Kesava Vijayan
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Publication number: 20170204083Abstract: 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: ApplicationFiled: January 13, 2017Publication date: July 20, 2017Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEYInventors: Edmond J. LAVOIE, Joseph David BAUMAN, Ajit PARHI, Hye Yeon SAGONG, Disha PATEL, Eddy ARNOLD, Kalyan DAS, Suyambu Kesava VIJAYAN
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Patent number: 9701638Abstract: 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: GrantFiled: November 8, 2013Date of Patent: July 11, 2017Assignee: Rutgers, The State University of New JerseyInventors: Edmond J. Lavoie, Joseph David Bauman, Hye Yeon Sagong, Eddy Arnold, Ajit Parhi, Kalyan Das, Suyambu Kesava Vijayan, Disha Patel
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Patent number: 9695135Abstract: 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: GrantFiled: May 11, 2015Date of Patent: July 4, 2017Assignee: Rutgers, The State University of New JerseyInventors: Edmond J. LaVoie, Eddy Arnold, Joseph D. Bauman, John E. Kerrigan, Ajit K. Parhi, Kalyan Das, Cody Kelley, Dishaben V. Patel
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Patent number: 9573938Abstract: 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: GrantFiled: September 11, 2013Date of Patent: February 21, 2017Assignee: Rutgers, The State University of New JerseyInventors: Edmond J. Lavoie, Joseph David Bauman, Ajit Parhi, Hye Yeon Sagong, Disha Patel, Eddy Arnold, Kalyan Das, Suyambu Kesava Vijayan
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Patent number: 9525735Abstract: 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: GrantFiled: October 30, 2013Date of Patent: December 20, 2016Assignee: FUTUREWEI TECHNOLOGIES, INC.Inventor: Kalyan Das
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Patent number: 9336406Abstract: 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: GrantFiled: November 14, 2013Date of Patent: May 10, 2016Assignee: Futurewei Technologies, Inc.Inventor: Kalyan Das
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Publication number: 20160111668Abstract: 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: ApplicationFiled: September 30, 2015Publication date: April 21, 2016Applicant: Tuskegee UniversityInventors: Naga Korivi, Kalyan Das
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Patent number: 9288116Abstract: 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: GrantFiled: December 28, 2012Date of Patent: March 15, 2016Assignee: Futurewei Technologies, Inc.Inventor: Kalyan Das
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Publication number: 20150322022Abstract: 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: ApplicationFiled: May 11, 2015Publication date: November 12, 2015Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEYInventors: Edmond J. LaVoie, Eddy Arnold, Joseph D. Bauman, John E. Kerrigan, Ajit K. Parhi, Kalyan Das, Cody Kelley, Dishaben V. Patel
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Publication number: 20150291531Abstract: 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: ApplicationFiled: November 8, 2013Publication date: October 15, 2015Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEYInventors: Edmond J. Lavoie, Joseph David Bauman, Hye Yeon Sagong, Eddy Arnold, Ajit Parhi, Kalyan Das, Suyambu Kesava Vijayan, Disha Patel
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Patent number: 9160650Abstract: 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: GrantFiled: June 17, 2013Date of Patent: October 13, 2015Assignee: Futurewei Technologies, Inc.Inventors: Hong Zhang, Kalyan Das
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Publication number: 20150232454Abstract: 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: ApplicationFiled: September 11, 2013Publication date: August 20, 2015Applicant: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEYInventors: Edmond J. Lavoie, Joseph David Bauman, Ajit Parhi, Hye Yeon Sagong, Disha Patel, Eddy Arnold, Kalyan Das, Suyambu Kesava Vijayan
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Patent number: 9079944Abstract: 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: GrantFiled: November 17, 2014Date of Patent: July 14, 2015Assignees: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, RUTGERS, THE STATE UNIVERSITY OF NEW JERSEYInventors: Gaetano T. Montelione, Kalyan Das, Edward Arnold, Li-Chung Ma, Rong Xiao, Robert M. Krug, Karen Y. Twu, Rei-Lin Kuo
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Publication number: 20150135331Abstract: 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: ApplicationFiled: November 14, 2013Publication date: May 14, 2015Applicant: FUTUREWEI TECHNOLOGIES, INC.Inventor: Kalyan DAS
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Publication number: 20150120925Abstract: 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: ApplicationFiled: October 30, 2013Publication date: April 30, 2015Applicant: FUTUREWEI TECHNOLOGIES, INC.Inventor: Kalyan DAS
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Publication number: 20150093405Abstract: 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: ApplicationFiled: November 17, 2014Publication date: April 2, 2015Inventors: Gaetano T. Montelione, Kalyan Das, Edward Arnold, Li-Chung Ma, Rong Xiao, Robert M. Krug, Karen Y. Twu, Rei-Lin Kuo
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Patent number: 8954392Abstract: 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: GrantFiled: December 28, 2012Date of Patent: February 10, 2015Assignee: FutureWei Technologies, Inc.Inventor: Kalyan Das