Patents by Inventor Surajit Sengupta

Surajit 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: 20240101506
    Abstract: The present invention discloses a continuous process for the synthesis of dimethyl carbonate from methanol and carbon dioxide over a ceria-based mixed metal oxide-silica catalyst formulation in the presence of a dehydrating or water trapping compound (2-Cyanopyridine).
    Type: Application
    Filed: January 25, 2022
    Publication date: March 28, 2024
    Inventors: Darbha SRINIVAS, Vijay Vasant BOKADE, Prashant Suresh NIPHADKAR, Unnikrishnan PULIKKEEL, Snehalkumar PARMAR, Vinay AMTE, Surajit SENGUPTA, Asit Kumar DAS
  • Patent number: 10376833
    Abstract: The present disclosure relates to a process for capturing carbon-dioxide from a gas stream. In order to capture the carbon-dioxide, a support is provided and potassium carbonate (K2CO3) is impregnated thereon to form an adsorbent comprising potassium carbonate (K2CO3) impregnated support. The adsorbent is activated to form an activated adsorbent. The gas stream is passed through the adsorber to enable adsorption of the carbon-dioxide on the activated adsorbent to form a carbon-dioxide laden adsorbent. The carbon-dioxide laden adsorbent is transferred to a desorber for at least partially desorbing the carbon-dioxide from the carbon-dioxide laden adsorbent by passing a carbon-dioxide deficient stream through the desorber. The partially regenerated adsorbent is returned to the adsorber for adsorbing the carbon-dioxide from the carbon-dioxide. The process of the present disclosure reduces the overall energy demand by partially regenerating the adsorbent.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: August 13, 2019
    Assignee: RELIANCE INDUSTRIES LIMITED
    Inventors: Surajit Sengupta, Vinay Amte, Asit Kumar Das, Satyanarayana Reddy Akuri, Manoj Yadav, Sukumar Mandal, Amit Gohel, Sampath Nerivetla, Kalyan Chandra Nath
  • Patent number: 10166502
    Abstract: The present disclosure provides a single compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2. The disclosure also provides a process for regeneration of the carbon dioxide capture media.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: January 1, 2019
    Assignee: RELIANCE INDUSTRIES LIMITED
    Inventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
  • Patent number: 10112170
    Abstract: The present invention relates to a stabilized inorganic oxide support for capturing carbon dioxide from gases having high regeneration capacities over many cycles. The method for preparing the stabilized inorganic oxide support includes stabilizing an alumina-containing precursor by either calcining or steaming, impregnating an alkali or alkaline earth compound into the stabilized alumina-and drying the alkali or alkaline earth compound-impregnated stabilized alumina. The stabilized inorganic oxide support can be regenerated at lower temperatures between 100 and 150° C. The carbon dioxide adsorption capacity of the regenerated support is between 70 and 90% of the theoretical carbon dioxide adsorption capacity.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: October 30, 2018
    Assignee: Reliance Industries Limited
    Inventors: Akuiri Satyanarayana Reddy, Surajit Sengupta, Rajeshwer Dongara, Asit Kumar Das, Vinay Amte, Ashwani Yadav, Pramod Kumar Bajpai, Haripada Bhunia
  • Publication number: 20180169574
    Abstract: The present disclosure relates to a process for capturing carbon-dioxide from a gas stream. In order to capture the carbon-dioxide, a support is provided and potassium carbonate (K2CO3) is impregnated thereon to form an adsorbent comprising potassium carbonate (K2CO3) impregnated support. The adsorbent is activated to form an activated adsorbent. The gas stream is passed through the adsorber to enable adsorption of the carbon-dioxide on the activated adsorbent to form a carbon-dioxide laden adsorbent. The carbon-dioxide laden adsorbent is transferred to a desorber for at least partially desorbing the carbon-dioxide from the carbon-dioxide laden adsorbent by passing a carbon-dioxide deficient stream through the desorber. The partially regenerated adsorbent is returned to the adsorber for adsorbing the carbon-dioxide from the carbon-dioxide. The process of the present disclosure reduces the overall energy demand by partially regenerating the adsorbent.
    Type: Application
    Filed: May 18, 2016
    Publication date: June 21, 2018
    Applicant: Reliance Industries Limited
    Inventors: Surajit SENGUPTA, Vinay AMTE, Asit Kumar DAS, Satyanarayana Reddy AKURI, Manoj YADAV, Sukumar MANDAL, Amit GOHEL, Sampath NERIVETLA, Kalyan Chandra NATH
  • Patent number: 9931593
    Abstract: The present disclosure provides a multiple-compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2. The disclosure also provides a process for regeneration of the carbon dioxide capture media.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: April 3, 2018
    Assignee: RELIANCE INDUSTRIES LIMITED
    Inventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
  • Publication number: 20170080400
    Abstract: The present invention relates to a stabilized inorganic oxide support for capturing carbon dioxide from gases having high regeneration capacities over many cycles. The method for preparing the stabilized inorganic oxide support includes stabilizing an alumina-containing precursor by either calcining or steaming, impregnating an alkali or alkaline earth compound into the stabilized alumina-and drying the alkali or alkaline earth compound-impregnated stabilized alumina-. The stabilized inorganic oxide support can be regenerated at lower temperatures between 100 and 150° C. The carbon dioxide adsorption capacity of the regenerated support is between 70 and 90% of the theoretical carbon dioxide adsorption capacity.
    Type: Application
    Filed: January 28, 2015
    Publication date: March 23, 2017
    Applicant: Reliance Industries Limited
    Inventors: Akuiri Satyanarayana Reddy, Surajit Sengupta, Rajeshwer Dongara, Asit Kumar Das, Vinay Amte, Ashwani Yadav, Pramod Kumar Bajpai, Haripada Bhunia
  • Patent number: 9581651
    Abstract: In at least one embodiment, a power management module measures an electromagnetic radiation spectrum or a voltage response of a battery module. The measured electromagnetic radiation spectrum or voltage response of the battery is compared to a plurality of reference electromagnetic radiation spectrums or voltage responses, respectively, which may be determined for authentic batteries, for example. A relative condition of the battery, such as an age or state of health, may be estimated based on the measured electromagnetic radiation spectrum or voltage response of the battery module, and stored in a memory store. The rate of change of the relative condition of the battery over a period of time may be determined to identify potential defects in the battery.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: February 28, 2017
    Assignee: BlackBerry Limited
    Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
  • Publication number: 20160250582
    Abstract: The present disclosure provides a single compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2 The disclosure also provides a process for regeneration of the carbon dioxide capture media.
    Type: Application
    Filed: September 29, 2014
    Publication date: September 1, 2016
    Inventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
  • Publication number: 20160236137
    Abstract: The present disclosure provides a multiple-compression system and a process for capturing carbon dioxide (CO2) from a flue gas stream containing CO2 The disclosure also provides a process for regeneration of the carbon dioxide capture media.
    Type: Application
    Filed: September 29, 2014
    Publication date: August 18, 2016
    Inventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
  • Patent number: 9406980
    Abstract: A method mitigates or even prevents gas swelling of a battery of a portable electronic device at high temperatures and states of charge of the battery. The method comprises: receiving “temperature” and “state of charge” signals, which are functions of a temperature and state of charge of the battery, respectively; determining, as corresponding functions of the “temperature” and “state of charge” signals, whether the temperature is within an elevated operating-temperature range and the state of charge is within an elevated state-of-charge range; cycle-forming the battery a predetermined number of cycles; and terminating the “cycle-forming” operation of the battery when the pre-determined number of cycles is reached.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: August 2, 2016
    Assignee: BlackBerry Limited
    Inventors: Surajit Sengupta, Yu William Feng, Jonathan Quinn Brubacher, Joseph Patino
  • Publication number: 20150084600
    Abstract: A method mitigates or even prevents gas swelling of a battery of a portable electronic device at high temperatures and states of charge of the battery. The method comprises: receiving “temperature” and “state of charge” signals, which are functions of a temperature and state of charge of the battery, respectively; determining, as corresponding functions of the “temperature” and “state of charge” signals, whether the temperature is within an elevated operating-temperature range and the state of charge is within an elevated state-of-charge range; cycle-forming the battery a predetermined number of cycles; and terminating the “cycle-forming” operation of the battery when the pre-determined number of cycles is reached.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicant: BLACKBERRY LIMITED
    Inventors: Surajit Sengupta, Yu William Feng, Jonathan Quinn Brubacher, Patino Joseph
  • Publication number: 20150002162
    Abstract: In at least one embodiment, a power management module measures an electromagnetic radiation spectrum or a voltage response of a battery module. The measured electromagnetic radiation spectrum or voltage response of the battery is compared to a plurality of reference electromagnetic radiation spectrums or voltage responses, respectively, which may be determined for authentic batteries, for example. A relative condition of the battery, such as an age or state of health, may be estimated based on the measured electromagnetic radiation spectrum or voltage response of the battery module, and stored in a memory store. The rate of change of the relative condition of the battery over a period of time may be determined to identify potential defects in the battery.
    Type: Application
    Filed: September 15, 2014
    Publication date: January 1, 2015
    Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
  • Patent number: 8860420
    Abstract: In at least one embodiment, a power management module measures an electromagnetic radiation spectrum or a voltage response of a battery module. The measured electromagnetic radiation spectrum or voltage response of the battery is compared to a plurality of reference electromagnetic radiation spectrums or voltage responses, respectively, which may be determined for authentic batteries, for example. A relative condition of the battery, such as an age or state of health, may be estimated based on the measured electromagnetic radiation spectrum or voltage response of the battery module, and stored in a memory store. The rate of change of the relative condition of the battery over a period of time may be determined to identify potential defects in the battery.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: October 14, 2014
    Assignee: BlackBerry Limited
    Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
  • Patent number: 8829911
    Abstract: In at least one embodiment, a power management module measures different observable quantities of a battery, such as terminal voltage or current, and measures a voltage response of the battery based upon the measurements. The measured voltage response of the battery is compared to a plurality of reference voltage responses, which may be determined for authentic batteries, for example. If the measured voltage response corresponds to each of the reference voltage responses, the battery is authenticated for use with an electronic device. If necessary, additional voltage responses may be measured and compared against corresponding reference voltage responses until the battery is authenticated by a sufficient number of corresponding responses. A relative condition of the battery, such as an age or state of health, may also be estimated based on the measured voltage response of the battery.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: September 9, 2014
    Assignee: BlackBerry Limited
    Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
  • Patent number: 8820626
    Abstract: Diagnostic use of physical and electrical battery parameters is made to enhance battery authentication and security. A power management module measures an electromagnetic radiation spectrum of a battery module based on signal strengths of the electromagnetic radiation detected at one or more antennas. The measured electromagnetic radiation spectrum of the battery is compared to a reference electromagnetic radiation spectrum, which may be specified for authentic batteries, for example. If the measured electromagnetic radiation spectrum corresponds to the reference electromagnetic radiation spectrum, the battery is authenticated for use with the mobile communication device. A relative condition of the battery, such as an age or state of health, may also be estimated based on the measured electromagnetic radiation spectrum of the battery module.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: September 2, 2014
    Assignee: BlackBerry Limited
    Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
  • Publication number: 20130069661
    Abstract: In at least one embodiment, a power management module measures different observable quantities of a battery, such as terminal voltage or current, and measures a voltage response of the battery based upon the measurements. The measured voltage response of the battery is compared to a plurality of reference voltage responses, which may be determined for authentic batteries, for example. If the measured voltage response corresponds to each of the reference voltage responses, the battery is authenticated for use with an electronic device. If necessary, additional voltage responses may be measured and compared against corresponding reference voltage responses until the battery is authenticated by a sufficient number of corresponding responses. A relative condition of the battery, such as an age or state of health, may also be estimated based on the measured voltage response of the battery.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 21, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
  • Publication number: 20130072154
    Abstract: Diagnostic use of physical and electrical battery parameters is made to enhance battery authentication and security. A power management module measures an electromagnetic radiation spectrum of a battery module based on signal strengths of the electromagnetic radiation detected at one or more antennas. The measured electromagnetic radiation spectrum of the battery is compared to a reference electromagnetic radiation spectrum, which may be specified for authentic batteries, for example. If the measured electromagnetic radiation spectrum corresponds to the reference electromagnetic radiation spectrum, the battery is authenticated for use with the mobile communication device. A relative condition of the battery, such as an age or state of health, may also be estimated based on the measured electromagnetic radiation spectrum of the battery module.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 21, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
  • Publication number: 20130069658
    Abstract: In at least one embodiment, a power management module measures an electromagnetic radiation spectrum or a voltage response of a battery module. The measured electromagnetic radiation spectrum or voltage response of the battery is compared to a plurality of reference electromagnetic radiation spectrums or voltage responses, respectively, which may be determined for authentic batteries, for example. A relative condition of the battery, such as an age or state of health, may be estimated based on the measured electromagnetic radiation spectrum or voltage response of the battery module, and stored in a memory store. The rate of change of the relative condition of the battery over a period of time may be determined to identify potential defects in the battery.
    Type: Application
    Filed: September 16, 2011
    Publication date: March 21, 2013
    Applicant: RESEARCH IN MOTION LIMITED
    Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
  • Patent number: 8310208
    Abstract: A method of developing an optimum a lithium battery charging algorithm is conducted by providing a salt dissolved in solvent permitting lithium ions to leave a cathode in large format battery cells. Charge and discharge are then measured under different C-rate conditions. Using the cathode material phase transformations to ascertain a differential curve, peaks in the differential curve are observed with all data plotted against dV/dt and V, where V represents voltage and t represents time. Areas in voltage ranges are then observed where the rate of increase is higher than in other areas. By varying the charging current, an optimum charging voltage can be ascertained and maintained.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: November 13, 2012
    Inventor: Surajit Sengupta