Patents by Inventor Sujit Mondal
Sujit Mondal 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: 11840594Abstract: The present invention provides a method for producing highly reactive polyisobutylene by liquid phase polymerization of isobutylene or isobutylene containing feed stock, wherein at least 70 mole % of polymer chains in the polyisobutylene have exo olefin end groups. Further, the present invention provides a catalyst composition for polymerization, comprising of a Lewis acid complexed with at least two Lewis bases selected from sterically hindered ether and linear dialkyl ether; or a Lewis base complexed with at least two Lewis acids selected from aluminium halides mixture. The present invention additionally provides that Lewis acid with Lewis bases mixture or Lewis base with Lewis acids mixture constituting the catalyst show synergistic effect resulting in high isobutylene conversion and production of polyisobutylene having high exo olefin content, while maintaining desired molecular weight range of 250-10000 Dalton.Type: GrantFiled: July 21, 2021Date of Patent: December 12, 2023Assignee: INDIAN OIL CORPORATION LIMITEDInventors: Rajasekhar Tota, Gurmeet Singh, Rashmi Rani, Sujit Mondal, Gurpreet Singh Kapur, Sankara Sri Venkata Ramakumar
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Patent number: 11774383Abstract: The present invention relates to a method based on proton NMR technique to differentiate genuine and spurious Hand-rub formulations. This method identifies and estimates all four components present in WHO-recommended Hand-rub formulations. Further, this method also identifies the presence of non-recommended/additional components present in WHO-recommended Hand-rub formulations. The method described in this invention utilizes experimental parameters and derived equations to quantify all four components in just fifteen minutes without using any organic solvents.Type: GrantFiled: June 30, 2021Date of Patent: October 3, 2023Assignee: INDIAN OIL CORPORATION LIMITEDInventors: Ravindra Kumar, Sujit Mondal, Christopher Jayaraj, Gurpreet Singh Kapur, Sankara Sri Venkata Ramakumar
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Patent number: 11618756Abstract: A compound capable of coordinating with a metal includes a chemical structure as shown in claim 1, in which: EPD represents a group having an electron pair donor atom; B and B? are each independently an aryl group, a heteroaryl group, an alkenyl group, or alkynyl group, or B and B? form a spirocyclic group; and R1, R2, and R3 are selected from various substituents.Type: GrantFiled: March 11, 2019Date of Patent: April 4, 2023Assignee: PPG Industries Ohio, Inc.Inventors: Robert W. Walters, Scott J. Moravek, Sujit Mondal, Ian Michael Jones, Anthony T. Gestrich
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Patent number: 11548841Abstract: The present invention provides a novel route for synthesis and production of linear alpha olefins (LAO) and central olefins from the feedstock comprising fatty acids, triglycerides and esters of fatty acids, and mixture thereof through controlled hydrogenolysis, hydrogenation and dehydration reactions simultaneously in a hydro processing reactor containing a catalyst system having dual site—a metallic site for hydrogenation/reduction reaction under hydrogen environment, and an acidic site for conversion of alcohol to olefin via E1 or E2 reaction mechanism.Type: GrantFiled: September 27, 2021Date of Patent: January 10, 2023Assignee: INDIAN OIL CORPORATION LIMITEDInventors: Vasamsetty Naga Veera Hima Bindu, Mainak Sarkar, Ganesh Vitthalrao Butley, Ajay Kumar, Sujit Mondal, Ramesh Karumanchi, Sarvesh Kumar, Madhusudan Sau, Gurpreet Singh Kapur, Sankara Sri Venkata Ramakumar
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Patent number: 11518751Abstract: A photochromic compound including a core skeletal structure represented by the following Formula (I), wherein D is oxygen or sulfur; E is oxygen, sulfur, or NR2?; a is 0 or 1; R1 is hydrogen, or substituted or unsubstituted alkyl; R2 and R2? are each independently selected from hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, or substituted or unsubstituted heterocycloalkyl; and the photochromic compound is a thermally reversible photochromic compound.Type: GrantFiled: May 28, 2018Date of Patent: December 6, 2022Assignee: Transitions Optical, Ltd.Inventors: Robert W. Walters, Chien-Yang Chiu, Anu Chopra, Darrin R. Dabideen, Sujit Mondal, Nick J. Parise, Wenjing Xiao
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Publication number: 20220098130Abstract: The present invention provides a novel route for synthesis and production of linear alpha olefins (LAO) and central olefins from the feedstock comprising fatty acids, triglycerides and esters of fatty acids, and mixture thereof through controlled hydrogenolysis, hydrogenation and dehydration reactions simultaneously in a hydro processing reactor containing a catalyst system having dual site—a metallic site for hydrogenation/reduction reaction under hydrogen environment, and an acidic site for conversion of alcohol to olefin via E1 or E2 reaction mechanism.Type: ApplicationFiled: September 27, 2021Publication date: March 31, 2022Inventors: Vasamsetty Naga Veera HIMA BINDU, Mainak SARKAR, Ganesh Vitthalrao BUTLEY, Ajay KUMAR, Sujit MONDAL, Ramesh KARUMANCHI, Sarvesh KUMAR, Madhusudan SAU, Gurpreet Singh KAPUR, Sankara Sri Venkata RAMAKUMAR
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Publication number: 20220025076Abstract: The present invention provides a method for producing highly reactive polyisobutylene by liquid phase polymerization of isobutylene or isobutylene containing feed stock, wherein at least 70 mole % of polymer chains in the polyisobutylene have exo olefin end groups. Further, the present invention provides a catalyst composition for polymerization, comprising of a Lewis acid complexed with at least two Lewis bases selected from sterically hindered ether and linear dialkyl ether; or a Lewis base complexed with at least two Lewis acids selected from aluminium halides mixture. The present invention additionally provides that Lewis acid with Lewis bases mixture or Lewis base with Lewis acids mixture constituting the catalyst show synergistic effect resulting in high isobutylene conversion and production of polyisobutylene having high exo olefin content, while maintaining desired molecular weight range of 250-10000 Dalton.Type: ApplicationFiled: July 21, 2021Publication date: January 27, 2022Inventors: Rajasekhar TOTA, Gurmeet SINGH, Rashmi RANI, Sujit MONDAL, Gurpreet Singh KAPUR, Sankara Sri Venkata RAMAKUMAR
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Publication number: 20220003698Abstract: The present invention relates to a method based on proton NMR technique to differentiate genuine and spurious Hand-rub formulations. This method identifies and estimates all four components present in WHO-recommended Hand-rub formulations. Further, this method also identifies the presence of non-recommended/additional components present in WHO-recommended Hand-rub formulations. The method described in this invention utilizes experimental parameters and derived equations to quantify all four components in just fifteen minutes without using any organic solvents.Type: ApplicationFiled: June 30, 2021Publication date: January 6, 2022Inventors: Ravindra KUMAR, Sujit MONDAL, Christopher JAYARAJ, Gurpreet Singh KAPUR, Sankara Sri Venkata RAMAKUMAR
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Publication number: 20210395436Abstract: The present invention relates to a photochromic article that includes a substrate and a photochromic layer formed from a curable photochromic composition. The photochromic composition includes a polyol component that includes a polycarbonate diol, an isocyanate component that includes an unblocked polyfunctional isocyanate and/or a blocked polyfunctional isocyanate, and at least one photochromic compound. The equivalents ratio of blocked/unblocked isocyanate equivalents of the isocyanate component to hydroxyl equivalents of the polyol component is at least 5:1. The photochromic article exhibits a T1/2 (Fade Half Life) at 23° C. of less than or equal to 70 seconds.Type: ApplicationFiled: November 7, 2019Publication date: December 23, 2021Inventors: Joseph D. TURPEN, Elizabeth A. ZEZINKA, Emily AMOND, Anu CHOPRA, Michael Frank HALEY, Beon-Kyu KIM, Sujit MONDAL, Nicholas J. PARISE, Brian SHAUGHNESSY, Robert W. WALTERS, Wenjing XIAO, An-Hung YEH
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Publication number: 20210198226Abstract: A photochromic compound including a core skeletal structure represented by the following Formula (I), wherein D is oxygen or sulfur; E is oxygen, sulfur, or NR2?; a is 0 or 1; R1 is hydrogen, or substituted or unsubstituted alkyl; R2 and R2? are each independently selected from hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, or substituted or unsubstituted heterocycloalkyl; and the photochromic compound is a thermally reversible photochromic compound.Type: ApplicationFiled: May 28, 2018Publication date: July 1, 2021Inventors: Robert W. Walters, Chien-Yang Chiu, Anu Chopra, Darrin R. Dabideen, Sujit Mondal, Nick J. Parise, Wenjing Xiao
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Publication number: 20210079009Abstract: A compound capable of coordinating with a metal includes a chemical structure as shown in claim 1, in which: EPD represents a group having an electron pair donor atom; B and B? are each independently an aryl group, a heteroaryl group, an alkenyl group, or alkynyl group, or B and B? form a spirocyclic group; and R1, R2, and R3 are selected from various substituents.Type: ApplicationFiled: March 11, 2019Publication date: March 18, 2021Applicant: PPG Industries Ohio, Inc.Inventors: Robert W. WALTERS, Kurt G. OLSON, Scott J. MORAVEK, Sujit MONDAL, Ian Michael JONES, Anthony T. GESTRICH
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Patent number: 10145996Abstract: The present invention relates to photochromic articles that include a substrate and at least one photochromic material that is adapted to change from an unactivated form to an activated form by exposure to radiation substantially in the wavelength range from 380 to 450 nanometers when measured over a range of from 380 to 700 nanometers. The photochromic article is also adapted to retain at least 12 percent of the delta OD measured in the Outdoor Test when tested in the Behind the Windshield Test. The photochromic material can be selected from certain compounds including, for example, fluoranthenoxazines, naphthopyrans, phenanthropyrans, fluoranthenopyrans, and indenonaphthopyrans, which each have bonded thereto at least one chiral or achiral lengthening group that provides the photochromic compound with dichroic properties. The present invention also relates to methods of forming a photochromic article.Type: GrantFiled: February 23, 2016Date of Patent: December 4, 2018Assignee: Transitions Optical, Inc.Inventors: Rachael L. DeMeio, Darrin R. Dabideen, Meng He, Anil Kumar, Sujit Mondal
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Publication number: 20160209561Abstract: The present invention relates to photochromic articles that include a substrate and at least one photochromic material that is adapted to change from an unactivated form to an activated form by exposure to radiation substantially in the wavelength range from 380 to 450 nanometers when measured over a range of from 380 to 700 nanometers. The photochromic article is also adapted to retain at least 12 percent of the delta OD measured in the Outdoor Test when tested in the Behind the Windshield Test. The photochromic material can be selected from certain compounds including, for example, fluoranthenoxazines, naphthopyrans, phenanthropyrans, fluoranthenopyrans, and indenonaphthopyrans, which each have bonded thereto at least one chiral or achiral lengthening group that provides the photochromic compound with dichroic properties. The present invention also relates to methods of forming a photochromic article.Type: ApplicationFiled: February 23, 2016Publication date: July 21, 2016Inventors: Rachael L. DeMeio, Darrin R. Dabideen, Meng He, Anil Kumar, Sujit Mondal
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Patent number: 9334439Abstract: The present invention relates to photochromic articles that include a substrate and at least one photochromic material that is adapted to change from an unactivated form to an activated form by exposure to radiation substantially in the wavelength range from 380 to 450 nanometers when measured over a range of from 380 to 700 nanometers. The photochromic article is also adapted to retain at least 12 percent of the delta OD measured in the Outdoor Test when tested in the Behind the Windshield Test. The photochromic material can be selected from certain compounds including, for example, fluoranthenoxazines, naphthopyrans, phenanthropyrans, fluoranthenopyrans, and indenonaphthopyrans, which each have bonded thereto at least one chiral or achiral lengthening group that provides the photochromic compound with dichroic properties. The present invention also relates to methods of forming a photochromic article.Type: GrantFiled: March 15, 2013Date of Patent: May 10, 2016Assignee: Transitions Optical, Inc.Inventors: Rachael L. DeMeio, Anil Kumar, Meng He, Darrin R. Dabideen, Sujit Mondal
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Patent number: 9034219Abstract: Described herein are compounds generally comprising an indeno[2?,3?:3,4]naptho[1,2-b]pyran structure. Such compounds may be useful for their photochromic properties, and be used in certain photochromic compositions. Such compositions may further comprise other photochromic compositions and/or materials. Additionally, such compounds and/or compositions may be suitable for preparing certain photochromic articles. Also described herein are methods for preparing certain photochromic compounds, compositions, and articles.Type: GrantFiled: December 7, 2011Date of Patent: May 19, 2015Assignee: Transitions Optical, Inc.Inventors: Meng He, Darrin R. Dabideen, Xiao-Man Dai, Wenjing Xiao, Ruisong Xu, Sujit Mondal, Anil Kumar, Anu Chopra
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Patent number: 8920928Abstract: Described herein are compounds generally comprising an indeno[2?,3?:3,4]naptho[1,2-b]pyran structure. Such compounds may be useful for their photochromic properties, and be used in certain photochromic compositions. Such compositions may further comprise other photochromic compositions and/or materials. Additionally, such compounds and/or compositions may be suitable for preparing certain photochromic articles.Type: GrantFiled: December 14, 2011Date of Patent: December 30, 2014Assignee: Transitions Optical, Inc.Inventors: Meng He, Darrin R. Dabideen, Sujit Mondal, Xiao-Man Dai, Ruisong Xu, Wenjing Xiao, Massimiliano Tomasulo, Huayun Yu, Anu Chopra, Anil Kumar
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Publication number: 20140272468Abstract: The present invention relates to photochromic articles that include a substrate and at least one photochromic material that is adapted to change from an unactivated form to an activated form by exposure to radiation substantially in the wavelength range from 380 to 450 nanometers when measured over a range of from 380 to 700 nanometers. The photochromic article is also adapted to retain at least 12 percent of the delta OD measured in the Outdoor Test when tested in the Behind the Windshield Test. The photochromic material can be selected from certain compounds including, for example, fluoranthenoxazines, naphthopyrans, phenanthropyrans, fluoranthenopyrans, and indenonaphthopyrans, which each have bonded thereto at least one chiral or achiral lengthening group that provides the photochromic compound with dichroic properties. The present invention also relates to methods of forming a photochromic article.Type: ApplicationFiled: March 15, 2013Publication date: September 18, 2014Applicant: Transitions Optical, Inc.Inventors: Rachael L. DeMeio, Anil Kumar, Meng He, Darrin R. Dabideen, Sujit Mondal
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Patent number: 8518546Abstract: The present invention relates to compounds represented by the following Formula I, Ring-A of the Formula I can be, for example an aryl group, and L1 is a chiral or achiral lengthening group. The compound represented by Formula I can be a photochromic compound. The present invention also relates to photochromic compositions and photochromic articles that include one or more photochromic compounds, such as represented by Formula I.Type: GrantFiled: December 16, 2010Date of Patent: August 27, 2013Assignee: Transitions Optical, Inc.Inventors: Meng He, Sujit Mondal, Darrin R. Dabideen, Anil Kumar, Xiao-Man Dai
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Publication number: 20120156508Abstract: Described herein are compounds generally comprising an indeno[2?,3?:3,4]naptho[1,2-b]pyran structure. Such compounds may be useful for their photochromic properties, and be used in certain photochromic compositions. Such compositions may further comprise other photochromic compositions and/or materials. Additionally, such compounds and/or compositions may be suitable for preparing certain photochromic articles.Type: ApplicationFiled: December 14, 2011Publication date: June 21, 2012Applicant: TRANSITIONS OPTICAL, INC.Inventors: Meng He, Darrin R. Dabideen, Sujit Mondal, Xiao-Man Dai, Ruisong Xu, Wenjing Xiao, Massimiliano Tomasulo, Huayun Yu, Anu Chopra, Anil Kumar
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Publication number: 20120156521Abstract: Described herein are compounds generally comprising an indeno[2?,3?:3,4]naptho[1,2-b]pyran structure. Such compounds may be useful for their photochromic properties, and be used in certain photochromic compositions. Such compositions may further comprise other photochromic compositions and/or materials. Additionally, such compounds and/or compositions may be suitable for preparing certain photochromic articles. Also described herein are methods for preparing certain photochromic compounds, compositions, and articles.Type: ApplicationFiled: December 7, 2011Publication date: June 21, 2012Applicant: TRANSITIONS OPTICAL, INC.Inventors: Meng He, Darrin R. Dabideen, Xiao-Man Dai, Wenjing Xiao, Ruisong Xu, Sujit Mondal, Anil Kumar, Anu Chopra