Patents by Inventor Rajat Kapoor
Rajat Kapoor 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: 11746296Abstract: The present technology describes methods and systems for an improved quench tower. Some embodiments improve the quench towers ability to recover particulate matter, steam, and emissions that escape from the base of the quench tower. Some embodiments improve the draft and draft distribution of the quench tower. Some embodiments include one or more sheds to enlarge the physical or effective perimeter of the quench tower to reduce the amount of particulate matter, emissions, and steam loss during the quenching process. Some embodiments include an improved quench baffle formed of a plurality of single-turn or multi-turn chevrons adapted to prevent particulate matter from escaping the quench tower. Some embodiments include an improved quench baffle spray nozzle used to wet the baffles, suppress dust, and/or clean baffles. Some embodiments include a quench nozzle that can fire in discrete stages during the quenching process.Type: GrantFiled: January 22, 2021Date of Patent: September 5, 2023Assignee: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLCInventors: Chun Wai Choi, Rajat Kapoor, John Francis Quanci
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Publication number: 20210388270Abstract: The present technology describes methods and systems for an improved quench tower. Some embodiments improve the quench towers ability to recover particulate matter, steam, and emissions that escape from the base of the quench tower. Some embodiments improve the draft and draft distribution of the quench tower. Some embodiments include one or more sheds to enlarge the physical or effective perimeter of the quench tower to reduce the amount of particulate matter, emissions, and steam loss during the quenching process. Some embodiments include an improved quench baffle formed of a plurality of single-turn or multi-turn chevrons adapted to prevent particulate matter from escaping the quench tower. Some embodiments include an improved quench baffle spray nozzle used to wet the baffles, suppress dust, and/or clean baffles. Some embodiments include a quench nozzle that can fire in discrete stages during the quenching process.Type: ApplicationFiled: January 22, 2021Publication date: December 16, 2021Inventors: Chun Wai Choi, Rajat Kapoor, John Francis Quanci
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Patent number: 11186713Abstract: Three independent approaches to the reduction of gas molecule permeability through a polyethylene terephthalate (PET) polyester film or container wall by increasing the mechanically or thermally induced crystallinity or the overall crystallinity level of a single or multilayer container, where the three approaches may be employed independently or in combination with one another.Type: GrantFiled: April 11, 2017Date of Patent: November 30, 2021Assignee: DAK AMERICAS LLCInventors: Rajat Kapoor, Peter S. Kezios, George F. Rollend
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Publication number: 20210363427Abstract: A duct intersection comprising a first duct portion and a second duct portion extending laterally from a side of the first duct portion. At least one flow modifier is mounted inside one of the first and second duct portions. The flow modifier is a contoured duct liner and/or the flow modifier includes at least one turning vane. The duct intersection may also include a transition portion extending between the first and second duct portions, wherein the transition portion has a length extending along a side of the first duct portion and a depth extending away from the side of the first duct portion, wherein the length is greater than a diameter of the second duct portion.Type: ApplicationFiled: March 3, 2021Publication date: November 25, 2021Inventors: John Francis Quanci, Rajat Kapoor, Chun Wai Choi, Ung-Kyung Chun
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Patent number: 11008517Abstract: The present technology is generally directed to non-perpendicular connections between coke oven uptakes and a hot common tunnel, and associated systems and methods. In some embodiments, a coking system includes a coke oven and an uptake duct in fluid communication with the coke oven. The uptake duct has an uptake flow vector of exhaust gas from the coke oven. The system also includes a common tunnel in fluid communication with the uptake duct. The common tunnel has a common flow vector and can be configured to transfer the exhaust gas to a venting system. The uptake flow vector and common flow vector can meet at a non-perpendicular interface to improve mixing between the flow vectors and reduce draft loss in the common tunnel.Type: GrantFiled: July 3, 2018Date of Patent: May 18, 2021Assignee: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLCInventors: Ung-Kyung Chun, Chun Wai Choi, Milos Kaplarevic, Rajat Kapoor, John Francis Quanci
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Patent number: 10975309Abstract: A duct intersection comprising a first duct portion and a second duct portion extending laterally from a side of the first duct portion. At least one flow modifier is mounted inside one of the first and second duct portions. The flow modifier is a contoured duct liner and/or the flow modifier includes at least one turning vane. The duct intersection may also include a transition portion extending between the first and second duct portions, wherein the transition portion has a length extending along a side of the first duct portion and a depth extending away from the side of the first duct portion, wherein the length is greater than a diameter of the second duct portion.Type: GrantFiled: September 30, 2016Date of Patent: April 13, 2021Assignee: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLCInventors: John Francis Quanci, Rajat Kapoor, Chun Wai Choi, Ung-Kyung Chun
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Patent number: 10927303Abstract: The present technology describes methods and systems for an improved quench tower. Some embodiments improve the quench tower's ability to recover particulate matter, steam, and emissions that escape from the base of the quench tower. Some embodiments improve the draft and draft distribution of the quench tower. Some embodiments include one or more sheds to enlarge the physical or effective perimeter of the quench tower to reduce the amount of particulate matter, emissions, and steam loss during the quenching process. Some embodiments include an improved quench baffle formed of a plurality of single-turn or multi-turn chevrons adapted to prevent particulate matter from escaping the quench tower. Some embodiments include an improved quench baffle spray nozzle used to wet the baffles, suppress dust, and/or clean baffles. Some embodiments include a quench nozzle that can fire in discrete stages during the quenching process.Type: GrantFiled: February 3, 2016Date of Patent: February 23, 2021Assignee: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLCInventors: Chun Wai Choi, Rajat Kapoor, John Francis Quanci
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Publication number: 20190169503Abstract: The present technology is generally directed to non-perpendicular connections between coke oven uptakes and a hot common tunnel, and associated systems and methods. In some embodiments, a coking system includes a coke oven and an uptake duct in fluid communication with the coke oven. The uptake duct has an uptake flow vector of exhaust gas from the coke oven. The system also includes a common tunnel in fluid communication with the uptake duct. The common tunnel has a common flow vector and can be configured to transfer the exhaust gas to a venting system. The uptake flow vector and common flow vector can meet at a non-perpendicular interface to improve mixing between the flow vectors and reduce draft loss in the common tunnel.Type: ApplicationFiled: July 3, 2018Publication date: June 6, 2019Inventors: Ung-Kyung Chun, Chun Wai Choi, Milos Kaplarevic, Rajat Kapoor, John Francis Quanci
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Publication number: 20190112471Abstract: Three independent approaches to the reduction of gas molecule permeability through a polyethylene terephthalate (PET) polyester film or container wall by increasing the mechanically or thermally induced crystallinity or the overall crystallinity level of a single or multilayer container, where the three approaches may be employed independently or in combination with one another.Type: ApplicationFiled: April 11, 2017Publication date: April 18, 2019Applicant: DAK AMERICAS LLCInventors: Rajat KAPOOR, Peter S. KEZIOS, George F. ROLLEND
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Patent number: 10047295Abstract: The present technology is generally directed to non-perpendicular connections between coke oven uptakes and a hot common tunnel, and associated systems and methods. In some embodiments, a coking system includes a coke oven and an uptake duct in fluid communication with the coke oven. The uptake duct has an uptake flow vector of exhaust gas from the coke oven. The system also includes a common tunnel in fluid communication with the uptake duct. The common tunnel has a common flow vector and can be configured to transfer the exhaust gas to a venting system. The uptake flow vector and common flow vector can meet at a non-perpendicular interface to improve mixing between the flow vectors and reduce draft loss in the common tunnel.Type: GrantFiled: March 14, 2013Date of Patent: August 14, 2018Assignee: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLCInventors: Ung-Kyung Chun, Chun Wai Choi, Milos Kaplarevic, Rajat Kapoor, John Francis Quanci
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Publication number: 20170015908Abstract: A duct intersection comprising a first duct portion and a second duct portion extending laterally from a side of the first duct portion. At least one flow modifier is mounted inside one of the first and second duct portions. The flow modifier is a contoured duct liner and/or the flow modifier includes at least one turning vane. The duct intersection may also include a transition portion extending between the first and second duct portions, wherein the transition portion has a length extending along a side of the first duct portion and a depth extending away from the side of the first duct portion, wherein the length is greater than a diameter of the second duct portion.Type: ApplicationFiled: September 30, 2016Publication date: January 19, 2017Inventors: John Francis Quanci, Rajat Kapoor, Chun Wai Choi, Ung-Kyung Chun
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Patent number: 9476547Abstract: A duct intersection comprising a first duct portion and a second duct portion extending laterally from a side of the first duct portion. At least one flow modifier is mounted inside one of the first and second duct portions. The flow modifier is a contoured duct liner and/or the flow modifier includes at least one turning vane. The duct intersection may also include a transition portion extending between the first and second duct portions, wherein the transition portion has a length extending along a side of the first duct portion and a depth extending away from the side of the first duct portion, wherein the length is greater than a diameter of the second duct portion.Type: GrantFiled: December 28, 2012Date of Patent: October 25, 2016Assignee: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLCInventors: John Francis Quanci, Rajat Kapoor, Chun Wai Choi, Ung-Kyung Chun
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Publication number: 20160222297Abstract: The present technology describes methods and systems for an improved quench tower. Some embodiments improve the quench tower's ability to recover particulate matter, steam, and emissions that escape from the base of the quench tower. Some embodiments improve the draft and draft distribution of the quench tower. Some embodiments include one or more sheds to enlarge the physical or effective perimeter of the quench tower to reduce the amount of particulate matter, emissions, and steam loss during the quenching process. Some embodiments include an improved quench baffle formed of a plurality of single-turn or multi-turn chevrons adapted to prevent particulate matter from escaping the quench tower. Some embodiments include an improved quench baffle spray nozzle used to wet the baffles, suppress dust, and/or clean baffles. Some embodiments include a quench nozzle that can fire in discrete stages during the quenching process.Type: ApplicationFiled: February 3, 2016Publication date: August 4, 2016Inventors: Chun Wai Choi, Rajat Kapoor, John Francis Quanci
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Patent number: 9273250Abstract: The present technology describes methods and systems for an improved quench tower. Some embodiments improve the quench tower's ability to recover particulate matter, steam, and emissions that escape from the base of the quench tower. Some embodiments improve the draft and draft distribution of the quench tower. Some embodiments include one or more sheds to enlarge the physical or effective perimeter of the quench tower to reduce the amount of particulate matter, emissions, and steam loss during the quenching process. Some embodiments include an improved quench baffle formed of a plurality of single-turn or multi-turn chevrons adapted to prevent particulate matter from escaping the quench tower. Some embodiments include an improved quench baffle spray nozzle used to wet the baffles, suppress dust, and/or clean baffles. Some embodiments include a quench nozzle that can fire in discrete stages during the quenching process.Type: GrantFiled: March 15, 2013Date of Patent: March 1, 2016Assignee: SunCoke Technology and Development LLC.Inventors: Chun Wai Choi, Rajat Kapoor, John Francis Quanci
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Patent number: 9273249Abstract: The present technology is generally directed to systems and methods for controlling air distribution in a coke oven. In a particular embodiment, a coke oven air distribution system comprises an oven chamber having an oven floor configured to support a coal bed, a plurality of sidewalls extending upward from the oven floor, and an oven crown covering a top portion of the oven chamber. The air distribution system further includes an air inlet positioned above the oven floor and a distributor proximate to the inlet. The inlet is configured to introduce air into the oven chamber and the distributor is configured to at least one of preheat, redirect, or spread air within the oven chamber.Type: GrantFiled: December 28, 2012Date of Patent: March 1, 2016Assignee: SunCoke Technology and Development LLC.Inventors: John Francis Quanci, Mark Anthony Ball, Chun Wai Choi, Rajat Kapoor
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Publication number: 20140183024Abstract: The present technology is generally directed to non-perpendicular connections between coke oven uptakes and a hot common tunnel, and associated systems and methods. In some embodiments, a coking system includes a coke oven and an uptake duct in fluid communication with the coke oven. The uptake duct has an uptake flow vector of exhaust gas from the coke oven. The system also includes a common tunnel in fluid communication with the uptake duct. The common tunnel has a common flow vector and can be configured to transfer the exhaust gas to a venting system. The uptake flow vector and common flow vector can meet at a non-perpendicular interface to improve mixing between the flow vectors and reduce draft loss in the common tunnel.Type: ApplicationFiled: March 14, 2013Publication date: July 3, 2014Inventors: Ung-Kyung Chun, Chun Wai Choi, Milos Kaplarevic, Rajat Kapoor, John Francis Quanci
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Publication number: 20140183023Abstract: The present technology is generally directed to systems and methods for controlling air distribution in a coke oven. In a particular embodiment, a coke oven air distribution system comprises an oven chamber having an oven floor configured to support a coal bed, a plurality of sidewalls extending upward from the oven floor, and an oven crown covering a top portion of the oven chamber. The air distribution system further includes an air inlet positioned above the oven floor and a distributor proximate to the inlet. The inlet is configured to introduce air into the oven chamber and the distributor is configured to at least one of preheat, redirect, or spread air within the oven chamber.Type: ApplicationFiled: December 28, 2012Publication date: July 3, 2014Applicant: SUNCOKE TECHNOLOGY AND DEVELOPMENT LLC.Inventors: John Francis Quanci, Mark Anthony Ball, Chun Wai Choi, Rajat Kapoor
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Patent number: 6979252Abstract: A low defectivity colloidal silica-based product slurry for use in chemical mechanical planarization (CMP) and an associated production method are described. The product slurry is produced using centrifugation of and optionally with addition of a surfactant to a starting colloidal silica (which can be a commercially available colloidal silica). The product slurry has substantially lower levels of soluble polymeric silicates than does the starting colloidal silica and affords lower defectivity levels when used in a slurry for CMP processing than does the starting colloidal silica.Type: GrantFiled: January 6, 2005Date of Patent: December 27, 2005Assignee: DuPont Air Products Nanomaterials LLCInventors: Junaid Ahmed Siddiqui, Daniel Hernandez Castillo, II, Rajat Kapoor, Tara Ranae Keefover, Robin Edward Richards