Patents by Inventor Uma SANKAR
Uma SANKAR 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: 20230406799Abstract: A system and a method for producing ethylene glycol are disclosed. Alkylene oxide and water are flowed into a first reactor unit and subjecting the alkylene oxide and water, in the first reactor unit, to first reaction conditions such that an effluent of the first reactor unit comprises an alkylene glycol, unreacted alkylene oxide, and unreacted water. At least a portion of the unreacted alkylene oxide may be routed to a second reaction unit and subjected to reaction conditions sufficient to produce additional alkylene glycol, wherein the second reactor unit is a reactive distillation column.Type: ApplicationFiled: October 14, 2021Publication date: December 21, 2023Applicant: SABIC GLOBAL TECHNOLOGIES B.V.Inventors: Jai Prakash JAIN, Uma SANKAR
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Publication number: 20230402555Abstract: A reflective semiconductor device includes an integrated circuit (IC) structure, and a pair of mirror elements over the IC structure. The pair of mirror elements are separated by a trench. Each mirror element includes a mirror layer of, for example, aluminum, on the IC structure, and a low temperature oxide (LTO) layer on the mirror layer. A high temperature oxide (HTO) layer is over the pair of mirror elements and fills the trench. A liquid crystal layer over the mirror elements provides a liquid crystal on semiconductor (LCOS) device. The two-oxide layer prevents mirror layer creep and/or agglomeration during formation of the HTO layer and provide a suitable surface for LCOS assembly without using specialized alloys.Type: ApplicationFiled: June 10, 2022Publication date: December 14, 2023Inventors: Thorsten E. Kammler, Robert Viktor Seidel, Michael Grillberger, Oliver Witnik, Nicole Brach, Raghav Shankar Uma Sankar
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Publication number: 20230202452Abstract: The disclosure provides a power control device, which comprises a bleeder circuit forming a first discharging path and an aux low-voltage (LV) power supply unit forming a second discharging path. The bleeder circuit is connected with a voltage-regulating capacitor stably maintaining the high-voltage (HV) level from a HV battery. The aux LV power supply unit is connected with the bleeder circuit and the voltage-regulating capacitor in parallel. The aux LV power supply unit provides an aux LV level to the driver, when the power system operates abnormally, the HV level is discharged through the first and second discharging path and/or a third discharging path formed by a driver and a motor.Type: ApplicationFiled: December 27, 2021Publication date: June 29, 2023Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chih-Chiang WU, Uma Sankar ROUT, Bang-Yuan LIU, Yun-Huan LI
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Publication number: 20200407387Abstract: The present disclosure relates to a process for preparing a transition metal-Schiff base imine ligand complex. The process involves direct chelation of a Schiff base imine ligand by adding a transition metal halide in a halogenated fluid medium at a temperature in the range of 20° C. to 40° C. The process employs less hazardous reagents and mild reaction conditions to obtain the complex. The complex is efficient to be used as a catalyst for the production of disentangled ultra-high molecular weight polyethylene.Type: ApplicationFiled: January 25, 2017Publication date: December 31, 2020Applicants: Reliance Industries Limited, Reliance Industries LimitedInventors: Mahuya Bagui, Yogesh Popatrao Patil, Viralkumar Patel, Raksh Vir Jasra, Ajit Behari Mathur, Gopal Tembe, Uma Sankar Satpathy, Satya Srinivasa Gandham
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Patent number: 10392481Abstract: The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from ?15° C. to 50° C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.Type: GrantFiled: May 26, 2014Date of Patent: August 27, 2019Assignee: Reliance Industries LimitedInventors: Ajit Behari Mathur, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Yogesh Popatrao Patil, Nanubhai Fuljibhai Patel, Gaurang Manilal Mehta, Raksh Vir Jasra
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Patent number: 10190236Abstract: The present disclosure relates to a compact polymer gel consisting of disentangled ultrahigh molecular weight polyethylene (dis-UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel of both low and high denier values. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 13 GPa, tensile modulus ranging from 100 to 270 GPa.Type: GrantFiled: February 17, 2015Date of Patent: January 29, 2019Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Ajit Behari Mathur, Raksh Vir Jasra, Krishna Renganath Sarma, Amit Kumar Punamchand Shah, Yogini Maheshbhai Amin, Gaurang Manilal Mehta, Nanubhai Fuljibhai Patel, Viralkumar Patel
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Patent number: 10105880Abstract: The present disclosure relates to a process for preparing of high thermal conductivity and high heat capacity oriented ultrahigh molecular weight polyethylene (UHMWPE) product. The process includes feeding UHMWPE through rollers to obtain a pre-laminate which is further hot stretched to obtain the oriented UHMWPE product having high thermal conductivity and high heat capacity. The temperature of stretching is maintained below the melt temperature of the UHMWPE throughout the entire process. There is also provided a high thermal conductivity and high heat capacity oriented UHMWPE product prepared by the process of the present disclosure. The oriented UHMWPE product is characterized in the axial thermal conductivity in the range of 70 to 200 W/mK, transverse direction thermal conductivity in the range of 0.022 to 0.045 W/mK and heat capacity in the range of 6 to 25 MJ/m3K.Type: GrantFiled: February 27, 2015Date of Patent: October 23, 2018Assignee: Reliance Industries LimitedInventors: Ajit Behari Mathur, Shivaji Vijay Kadam, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Nanubhai Fuljibhai Patel, Gaurang Manilal Mehta, Yogini Maheshbhai Amin, Amit Kumar Punamchand Shah, Viral Kumar Patel, Raksh Vir Jasra, Devesh Kumar Shukla, Ashishkumar Indravadan Parekh
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Patent number: 10030121Abstract: A catalyst composition and a process for obtaining a colored olefin polymer are disclosed. The composition comprises a Ziegler-Natta catalyst and an additive component comprising a colorant. The catalyst composition enables a directly colored polymer to be prepared. The colored polymer has a homogeneous dispersion of the colorant in it and thus has no color defects.Type: GrantFiled: April 1, 2016Date of Patent: July 24, 2018Assignee: Reliance Industries LimitedInventors: Mahuya Bagui, Yogesh Popatrao Patil, ViralKumar Patel, Krishna Renganath Sharma, Raksh Vir Jasra, Ajit Behari Mathur, Uma Sankar Satpathy, Satya Srinivasa Rao Gandham
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Patent number: 9915012Abstract: The present disclosure relates to a compact polymer gel consisting of ultrahigh molecular weight polyethylene (UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 10 GPa and tensile modulus ranging from 110 to 300 GPa.Type: GrantFiled: May 21, 2014Date of Patent: March 13, 2018Assignee: Reliance Industries LimitedInventors: Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Ajit Behari Mathur, Raksh Vir Jasra, Krishna Renganath Sarma, Amit Kumar Punamchand Shah, Yogini Maheshbhai Amin, Gaurang Manilal Mehta, Nanubhai Fuljibhai Patel, Viralkumar Patel
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Patent number: 9884927Abstract: The present disclosure provides a heterogeneous Ziegler-Natta catalyst system to be used in the preparation of ultra-high molecular weight polymers (UHMWP). The system includes at least one procatalyst, at least one co-catalyst, at least one hydrocarbon medium and at least one external donor, wherein the ratio of elemental magnesium to elemental titanium to halide, in the procatalyst, is 1:1.3:3.7; the ratio of elemental aluminum, present in the co-catalyst to elemental titanium, present in the procatalyst, ranges between 6:1 and 12:1; and the ratio of elemental silicon, present in the external donor to elemental titanium, present in the procatalyst, ranges between 1:10 and 10:1. The present disclosure also provides a process for preparation of UHMWPE using the heterogeneous Ziegler-Natta catalyst system of the present disclosure.Type: GrantFiled: December 13, 2013Date of Patent: February 6, 2018Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Krishna Renganath Sarma, Yogesh Popatrao Patil, Viralkumar Patel, Mahuya Bagui, Ajit Behari Mathur, Raksh Vir Jasra, Suketu Vakil, Vijay Shivaji Kadam, Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Jyotindra Bachubhai Patel, Mitul Sureshchandra Sheth
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Patent number: 9624363Abstract: In the present disclosure an easily processable ultrahigh molecular weight polyethylene and a process for preparation thereof is disclosed wherein the easy processable ultrahigh molecular weight polyethylene is prepared by melt mixing a first ultrahigh molecular weight polyethylene having poor process-ability and a second ultrahigh molecular weight polyethylene along with a minimal amount of solvent. The easily processable ultrahigh molecular weight polyethylene is melt processable below its melting point and requires lesser compression molding time as compared to the first ultrahigh molecular weight polyethylene.Type: GrantFiled: December 13, 2013Date of Patent: April 18, 2017Assignee: Reliance Industries LimitedInventors: Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Ajit Behari Mathur, Raksh Vir Jasra, Krishna Renganath Sarma
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Patent number: 9574040Abstract: In accordance with the present disclosure, there is provided a solid state graft copolymerization process for the preparation of disentangled ultrahigh molecular weight polyethylene graft copolymers in which disentangled ultrahigh molecular weight polyethylene is admixed with at least one functional monomer and a free radical initiator to obtain a mixture; and the mixture thus obtained is subjected to solid state polymerization to obtain a graft copolymer of disentangled ultrahigh molecular weight polyethylene. The graft copolymers of disentangled ultrahigh molecular weight polyethylene shows better crystallization temperature that ranges between 117° C. to 121° C. and improved decomposition temperature (T100) that ranges between 460° C. to 480° C.Type: GrantFiled: September 10, 2013Date of Patent: February 21, 2017Assignee: RELIANCE INDUSTRIES LIMITEDInventors: Satya Srinivasa Rao Gandham, Ajit Behari Mathur, Uma Sankar Satpathy, Krishna Renganath Sarma, Raksh Vir Jasra
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Publication number: 20170009382Abstract: The present disclosure relates to a compact polymer gel consisting of disentangled ultrahigh molecular weight polyethylene (dis-UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel of both low and high denier values. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 13 GPa, tensile modulus ranging from 100 to 270 GPa.Type: ApplicationFiled: February 17, 2015Publication date: January 12, 2017Applicant: RELIANCE INDUSTRIES LIMITEDInventors: Uma Sankar SATPATHY, Satya Srinivasa Rao GANDHAM, Ajit Behari MATHUR, Raksh Vir JASRA, Krishna Renganath SARMA, Amit Kumar Punamchand SHAH, Yogini Maheshbhai AMIN, Gaurang Manilal MEHTA, Nanubhai Fuljibhai PATEL, Viralkumar PATEL
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Publication number: 20160368182Abstract: The present disclosure relates to a process for preparing of high thermal conductivity and high heat capacity oriented ultrahigh molecular weight polyethylene (UHMWPE) product. The process includes feeding UHMWPE through rollers to obtain a pre-laminate which is further hot stretched to obtain the oriented UHMWPE product having high thermal conductivity and high heat capacity. The temperature of stretching is maintained below the melt temperature of the UHMWPE throughout the entire process. There is also provided a high thermal conductivity and high heat capacity oriented UHMWPE product prepared by the process of the present disclosure. The oriented UHMWPE product is characterized in the axial thermal conductivity in the range of 70 to 200 W/mK, transverse direction thermal conductivity in the range of 0.022 to 0.045 W/mK and heat capacity in the range of 6 to 25 MJ/m3K.Type: ApplicationFiled: February 27, 2015Publication date: December 22, 2016Applicant: Reliance Industries LimitedInventors: Ajit Behari Mathur, Shivaji Vijay Kadam, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Nanubhai Fuljibhai Patel, Gaurang Manilal Mehta, Yogini Maheshbhai Amin, Amit Kumar Punamchand Shah, Viral Kumar Patel, Raksh Vir Jasra, Devesh Kumar Shukla, Ashishkumar Indravadan Parekh
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Patent number: 9512307Abstract: A polymer composition has homogenous dispersion of a first polymer with a second polymer. The first polymer includes but is not limited to ethylene based homopolymer and ethylene based copolymer. The second polymer has molecular weight higher than the molecular weight of the first polymer and heat of fusion greater than 200 J/g.Type: GrantFiled: October 4, 2013Date of Patent: December 6, 2016Assignee: Reliance Industries LimitedInventors: Ajit Behari Mathur, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Vijay Shivaji Kadam, Raksh Vir Jasra
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Publication number: 20160289422Abstract: A catalyst composition and a process for obtaining a colored olefin polymer are disclosed. The composition comprises a Ziegler-Natta catalyst and an additive component comprising a colorant. The catalyst composition enables a directly colored polymer to be prepared. The colored polymer has a homogeneous dispersion of the colorant in it and thus has no color defects.Type: ApplicationFiled: April 1, 2016Publication date: October 6, 2016Applicant: Reliance Industries LimitedInventors: Mahuya Bagui, Yogesh Popatrao Patil, ViralKumar Patel, Krishna Renganath Sharma, Raksh Vir Jasra, Ajit Behari Mathur, Uma Sankar Satpathy, Satya Srinivasa Rao Gandham
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Publication number: 20160168758Abstract: The present disclosure relates to a compact polymer gel consisting of ultrahigh molecular weight polyethylene (UHMWPE), at least one nucleator, at least one filler and at least one fluid medium. The present disclosure also provides a process for the preparation of the compact polymeric gel and fibers from the compact polymeric gel. The fibers prepared in accordance with the present process have tensile strength ranging from 2.5 to 10 GPa and tensile modulus ranging from 110 to 300 GPa.Type: ApplicationFiled: May 21, 2014Publication date: June 16, 2016Applicant: Reliance Industries LimitedInventors: Uma Sankar Satpathy, Satya Srinvasa Rao Gandham, Ajit Behari Mathur, Raksh Fir Jasra, Krishna Renganath Sarma, Amit Kumar Punamchand Shah, Yogini Maheshbhai Amin, Gaurang Manilal Mehta, Nanubhai Fuljibhai Patel, Viralkumar Patel
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Publication number: 20160173349Abstract: System and method for testing a gateway device is disclosed. The system comprises a communication port and a memory coupled to one or more processors. The system is configured to identify a gateway device connected to the system through the communication port. The system further identifies a set of protocols applicable to the gateway device. Once the protocols are identified, the system simulates a network device to connect with the gateway device using a protocol from the set of protocols. The system further enables the network device to connect with the gateway device in order to determine a performance of the network device.Type: ApplicationFiled: December 2, 2015Publication date: June 16, 2016Inventors: Tammana Uma Sankar, Ankur Bansal
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Publication number: 20160090453Abstract: The present disclosure relates to a process for the preparation of high strength and high modulus polyethylene products/laminates consisting of steps such as providing a pre-dried, at least 50% disentangled ultra-high molecular weight polyethylene (UHMWPE) powder, feeding the UHMWPE powder having temperature ranging from ?15° C. to 50° C., at the nip of at least one pair of heated, polished counter rotating calendaring rollers, rotating at different roller speeds to obtain at least one pre-laminate and hot stretching the pre-laminate(s) at a pre-determined temperature and pre-determined stretching speed to obtain high strength laminates. The laminates provided by the present disclosure have tensile strength ranging between 0.5 GPa and 3.0 GPa and tensile modulus ranging between 40 GPa and 200 GPa.Type: ApplicationFiled: May 26, 2014Publication date: March 31, 2016Applicant: Reliance Industries LimitedInventors: Ajit Behari Mathur, Satya Srinivasa Rao Gandham, Uma Sankar Satpathy, Krishna Renganath Sarma, Yogesh Popatrao Patil, Nanubhai Fuljibhai Patel, Gaurang Manilal Mehta, Raksh Vir Jasra
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Publication number: 20150344593Abstract: The present disclosure provides a heterogeneous Ziegler-Natta catalyst system to be used in the preparation of ultra-high molecular weight polymers (UHMWP). The system includes at least one procatalyst, at least one co-catalyst, at least one hydrocarbon medium and at least one external donor, wherein the ratio of elemental magnesium to elemental titanium to halide, in the procatalyst, is 1:1.3:3.7; the ratio of elemental aluminum, present in the co-catalyst to elemental titanium, present in the procatalyst, ranges between 6:1 and 12:1; and the ratio of elemental silicon, present in the external donor to elemental titanium, present in the procatalyst, ranges between 1:10 and 10:1. The present disclosure also provides a process for preparation of UHMWPE using the heterogeneous Ziegler-Natta catalyst system of the present disclosure.Type: ApplicationFiled: December 13, 2013Publication date: December 3, 2015Inventors: Krishna Renganath Sarma, Yogesh Popatrao Patil, Viralkumar Patel, Mahuya Bagui, Ajit Behari Mathur, Raksh Vir Jasra, Suketu Vakil, Vijay Shivaji Kadam, Uma Sankar Satpathy, Satya Srinivasa Rao Gandham, Jyotindra Bachubhai Patel, Mitul Sureshchandra Sheth