Patents by Inventor Raghuvir N. Sengupta

Raghuvir N. Sengupta 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: 20230398732
    Abstract: The present disclosure describes materials, methods, and systems for three-dimensional printing. In one example, a three-dimensional printing kit can include a fusing agent and a microbe-inhibiting agent. The fusing agent can include water and an electromagnetic radiation absorber. The electromagnetic radiation absorber can absorb radiation and convert the radiation energy to heat. The microbe-inhibiting agent can include a liquid vehicle and a metal bis(dithiolene) complex. The disclosure also describes methods of three-dimensional printing that utilize a metal-containing microbe-inhibiting material, which can be a metal bis(dithiolene) complex or other materials.
    Type: Application
    Filed: October 30, 2020
    Publication date: December 14, 2023
    Inventors: JARRID ALEXANDER WITTKOPF, KRISTOPHER J ERICKSON, EMRE HIRO DISCEKICI, STERLING CHAFFINS, KEVIN P DeKAM, RAGHUVIR N SENGUPTA, ALBERT LIU, ELIZABETH GALATI
  • Patent number: 11280739
    Abstract: A surface enhanced luminescence system may include a laser and a controller to output control signals causing the laser to irradiate the pre-analyte exposed plasmonic surface while maintaining a profile of the pre-analyte exposed plasmonic surface.
    Type: Grant
    Filed: July 17, 2017
    Date of Patent: March 22, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Raghuvir N. Sengupta, Anita Rogacs
  • Patent number: 11280740
    Abstract: A luminescence-enhancement system can include a luminescence-enhancement sensor having a substrate and a group of nanofingers with individual nanofingers that can be flexible and include a support end attached to the substrate, a distal tip positioned distally with respect to the substrate, and a middle portion between the support end and the distal tip. A coating of a metal or metal alloy can be applied to the substrate and the distal tip that is conductively continuous. The middle portion can be devoid of the coating or the coating at the middle portion is conductively discontinuous. A liquid ejector can be present and can include a jetting nozzle to eject a liquid droplet having a volume of 2 pL to 10 ?L. The group of nanofingers and the jetting nozzle can be positionable relative to one another for the droplet to be deposited on the group of nanofingers.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: March 22, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Steven Barcelo, Anita Rogacs, Raghuvir N. Sengupta
  • Publication number: 20220026361
    Abstract: In an example method, an ordered array of microdots including an analyte printed on a surface of a surface-enhanced substrate of an analysis chip is probed with an excitation beam of electromagnetic radiation. Emitted radiation is detected from a number of microdots of the ordered array of microdots. Calibration data is generated for the analysis chip with respect to the analyte based on a detected shift in the emitted radiation as compared to the excitation beam.
    Type: Application
    Filed: December 18, 2018
    Publication date: January 27, 2022
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Fausto D'Apuzzo, Steven Barcelo, Raghuvir N. Sengupta
  • Patent number: 11169091
    Abstract: A surfaced enhanced luminescence analyte interrogation stage shipping and storage package may include a sealed chamber, a liquid contained within the sealed chamber and nano pillars within the sealed chamber and submersed within the liquid. The nano pillars comprise polymer posts and metallic caps forming tips of the nano pillars.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: November 9, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Christopher N. Young, Milo Overbay, Anita Rogacs, Raghuvir N. Sengupta
  • Publication number: 20210252499
    Abstract: In one example, an apparatus includes a surface-enhanced substrate having a microdot deposited onto a surface thereon via a microfluidic ejector. The microdot includes a predetermined concentration of an analyte.
    Type: Application
    Filed: October 11, 2018
    Publication date: August 19, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Fausto D'Apuzzo, Trinny Tat, Raghuvir N. Sengupta, Steven Barcelo, Anita Rogacs
  • Publication number: 20210208079
    Abstract: A surface enhanced luminescence system may include a laser and a controller to output control signals causing the laser to irradiate the pre-analyte exposed plasmonic surface while maintaining a profile of the pre-analyte exposed plasmonic surface.
    Type: Application
    Filed: July 17, 2017
    Publication date: July 8, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Raghuvir N. SENGUPTA, Anita ROGACS
  • Publication number: 20210181104
    Abstract: A surfaced enhanced luminescence analyte interrogation stage shipping and storage package may include a sealed chamber, a liquid contained within the sealed chamber and nano pillars within the sealed chamber and submersed within the liquid. The nano pillars comprise polymer posts and metallic caps forming tips of the nano pillars.
    Type: Application
    Filed: July 20, 2017
    Publication date: June 17, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Christopher N. YOUNG, Milo OVERBAY, Anita ROGACS, Raghuvir N. SENGUPTA
  • Patent number: 10983061
    Abstract: A surface enhanced luminescence analyte nano pillar stage may include a substrate, an array of closable pillars extending from the substrate and a fluid supply connected to the array of pillars. The fluid supply is to at least partially replenish fluid amongst the pillars of the array that has evaporated to maintain a level of the fluid amongst the pillars of the array below tops of the pillars.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: April 20, 2021
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Steven Barcelo, Anita Rogacs, Raghuvir N. Sengupta
  • Publication number: 20210096079
    Abstract: A luminescence-enhancement system can include a luminescence-enhancement sensor having a substrate and a group of nanofingers with individual nanofingers that can be flexible and include a support end attached to the substrate, a distal tip positioned distally with respect to the substrate, and a middle portion between the support end and the distal tip. A coating of a metal or metal alloy can be applied to the substrate and the distal tip that is conductively continuous. The middle portion can be devoid of the coating or the coating at the middle portion is conductively discontinuous. A liquid ejector can be present and can include a jetting nozzle to eject a liquid droplet having a volume of 2 pL to 10 ?L. The group of nanofingers and the jetting nozzle can be positionable relative to one another for the droplet to be deposited on the group of nanofingers.
    Type: Application
    Filed: April 6, 2018
    Publication date: April 1, 2021
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Steven Barcelo, Anita Rogacs, Raghuvir N. Sengupta
  • Publication number: 20200256800
    Abstract: A surface enhanced luminescence analyte nano pillar stage may include a substrate, an array of closable pillars extending from the substrate and a fluid supply connected to the array of pillars. The fluid supply is to at least partially replenish fluid amongst the pillars of the array that has evaporated to maintain a level of the fluid amongst the pillars of the array below tops of the pillars.
    Type: Application
    Filed: October 24, 2017
    Publication date: August 13, 2020
    Inventors: Steven Barcelo, Anita Rogacs, Raghuvir N. Sengupta