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).
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Publication number: 20240101506Abstract: 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: ApplicationFiled: January 25, 2022Publication date: March 28, 2024Inventors: Darbha SRINIVAS, Vijay Vasant BOKADE, Prashant Suresh NIPHADKAR, Unnikrishnan PULIKKEEL, Snehalkumar PARMAR, Vinay AMTE, Surajit SENGUPTA, Asit Kumar DAS
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Patent number: 10376833Abstract: 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: GrantFiled: May 18, 2016Date of Patent: August 13, 2019Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Surajit Sengupta, Vinay Amte, Asit Kumar Das, Satyanarayana Reddy Akuri, Manoj Yadav, Sukumar Mandal, Amit Gohel, Sampath Nerivetla, Kalyan Chandra Nath
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Patent number: 10166502Abstract: 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: GrantFiled: September 29, 2014Date of Patent: January 1, 2019Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Patent number: 10112170Abstract: 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: GrantFiled: January 28, 2015Date of Patent: October 30, 2018Assignee: Reliance Industries LimitedInventors: Akuiri Satyanarayana Reddy, Surajit Sengupta, Rajeshwer Dongara, Asit Kumar Das, Vinay Amte, Ashwani Yadav, Pramod Kumar Bajpai, Haripada Bhunia
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Publication number: 20180169574Abstract: 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: ApplicationFiled: May 18, 2016Publication date: June 21, 2018Applicant: Reliance Industries LimitedInventors: Surajit SENGUPTA, Vinay AMTE, Asit Kumar DAS, Satyanarayana Reddy AKURI, Manoj YADAV, Sukumar MANDAL, Amit GOHEL, Sampath NERIVETLA, Kalyan Chandra NATH
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Patent number: 9931593Abstract: 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: GrantFiled: September 29, 2014Date of Patent: April 3, 2018Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Publication number: 20170080400Abstract: 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: ApplicationFiled: January 28, 2015Publication date: March 23, 2017Applicant: Reliance Industries LimitedInventors: Akuiri Satyanarayana Reddy, Surajit Sengupta, Rajeshwer Dongara, Asit Kumar Das, Vinay Amte, Ashwani Yadav, Pramod Kumar Bajpai, Haripada Bhunia
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Patent number: 9581651Abstract: 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: GrantFiled: September 15, 2014Date of Patent: February 28, 2017Assignee: BlackBerry LimitedInventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
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Publication number: 20160250582Abstract: 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: ApplicationFiled: September 29, 2014Publication date: September 1, 2016Inventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Publication number: 20160236137Abstract: 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: ApplicationFiled: September 29, 2014Publication date: August 18, 2016Inventors: Vinay Amte, Asit Kumar Das, Surajit Sengupta, Manoj Yadav, Sukumar Mandal, Alok Pal, Ajay Gupta, Ramesh Bhujade, Satyanarayana Reddy Akuri, Rajeshwer Dongara
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Patent number: 9406980Abstract: 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: GrantFiled: September 24, 2013Date of Patent: August 2, 2016Assignee: BlackBerry LimitedInventors: Surajit Sengupta, Yu William Feng, Jonathan Quinn Brubacher, Joseph Patino
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Publication number: 20150084600Abstract: 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: ApplicationFiled: September 24, 2013Publication date: March 26, 2015Applicant: BLACKBERRY LIMITEDInventors: Surajit Sengupta, Yu William Feng, Jonathan Quinn Brubacher, Patino Joseph
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Publication number: 20150002162Abstract: 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: ApplicationFiled: September 15, 2014Publication date: January 1, 2015Inventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
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Patent number: 8860420Abstract: 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: GrantFiled: September 16, 2011Date of Patent: October 14, 2014Assignee: BlackBerry LimitedInventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
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Patent number: 8829911Abstract: 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: GrantFiled: September 16, 2011Date of Patent: September 9, 2014Assignee: BlackBerry LimitedInventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
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Patent number: 8820626Abstract: 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: GrantFiled: September 16, 2011Date of Patent: September 2, 2014Assignee: BlackBerry LimitedInventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
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Publication number: 20130069661Abstract: 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: ApplicationFiled: September 16, 2011Publication date: March 21, 2013Applicant: RESEARCH IN MOTION LIMITEDInventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
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Publication number: 20130072154Abstract: 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: ApplicationFiled: September 16, 2011Publication date: March 21, 2013Applicant: RESEARCH IN MOTION LIMITEDInventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
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Publication number: 20130069658Abstract: 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: ApplicationFiled: September 16, 2011Publication date: March 21, 2013Applicant: RESEARCH IN MOTION LIMITEDInventors: David Gerard Rich, Taha Shabbir Husain Sutarwala, Surajit Sengupta
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Patent number: 8310208Abstract: 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: GrantFiled: July 1, 2010Date of Patent: November 13, 2012Inventor: Surajit Sengupta