Patents by Inventor Amitabha Kumar
Amitabha Kumar 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: 10377868Abstract: Polyurethane composites and methods of preparation are described herein. The polyurethane composites can comprise (a) a polyurethane formed by the reaction of (i) one or more isocyanates selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, and (ii) one or more polyols, (b) an inorganic filler, (c) an inorganic fiber, and (d) an organic fiber. Suitable organic fibers can include polyester fibers. The weight ratio of the inorganic fiber to the organic fiber can be from 1:1 to 20:1. Articles comprising the polyurethane composites described herein are also disclosed.Type: GrantFiled: December 17, 2015Date of Patent: August 13, 2019Assignee: BORAL IP HOLDINGS (AUSTRALIA) PTY LIMITEDInventors: Amitabha Kumar, Li Ai, Sarah Fortenberry, Russell L. Hill
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Publication number: 20190241471Abstract: Cementitious compositions and methods for producing the cementitious compositions are described herein. The methods can include mixing a compound of the general formula MaSibXcOd, MaSibXcOd(OH)e, MaSibXc(OH)e, or MaSibXc(OH)e, (H2O)f, wherein M comprises a metal that can react with carbon dioxide in a carbonation reaction to form a carbonate, Si forms an oxide during the carbonation reaction, X is an element other than M or Si, a, b, d, e, and f are greater than zero, and c is zero or greater, with a rapid setting hydraulic cement to produce a cementitious mixture. The methods can further include hydrating the cementitious mixture and carbonating the cementitious mixture. Carbonating the cementitious mixture can occur simultaneously with hydrating the cementitious mixture or subsequent to hydrating the cementitious mixture. In some embodiments, the non-hydraulic cement can comprise wollastonite. The hydraulic cement can be in an amount of from 5 wt % to 80 wt % of the cementitious composition.Type: ApplicationFiled: April 12, 2019Publication date: August 8, 2019Applicant: Boral IP Holdings (Australia) PTY LimitedInventors: Russell L. HILL, Amitabha KUMAR
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Publication number: 20190225800Abstract: Polyurethane composites having improved mechanical strength and linear coefficient of thermal expansion (LCTE) and methods of manufacturing are described herein. The composites can include (a) a polyurethane formed by the reaction of (i) one or more isocyanates selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, and (ii) one or more polyols; (b) a filler in an amount of from greater than 50% to 90% by weight, based on the total weight of the polyurethane composite, (c) from 0.25% to 10% by weight, based on the total weight of the composite, of glass fibers; and (d) from 0.025% to 5% by weight, based on the total weight of the composite, of polyester fibers. The polyester fibers can have an average aspect ratio of length to diameter of from 5:1 to 600:1. The LCTE (?40° C. to 70° C.) of the polyurethane composite can be 2.2×10-5/° C. or less.Type: ApplicationFiled: September 29, 2016Publication date: July 25, 2019Applicant: BORAL IP HOLDINGS (AUTRALIA) PTY LIMITEDInventors: Amitabha KUMAR, Cassandra HILL, Li Al
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Patent number: 10301217Abstract: Cementitious compositions and methods for producing the cementitious compositions are described herein. The methods can include mixing a compound of the general formula MaSibXcOd, MaSibXcOd(OH)e, MaSibXc(OH)e, or MaSibXc(OH)e.(H2O)f, wherein M comprises a metal that can react with carbon dioxide in a carbonation reaction to form a carbonate, Si forms an oxide during the carbonation reaction, X is an element other than M or Si, a, b, d, e, and f are greater than zero, and c is zero or greater, with a rapid setting hydraulic cement to produce a cementitious mixture. The methods can further include hydrating the cementitious mixture and carbonating the cementitious mixture. Carbonating the cementitious mixture can occur simultaneously with hydrating the cementitious mixture or subsequent to hydrating the cementitious mixture. In some embodiments, the non-hydraulic cement can comprise wollastonite. The hydraulic cement can be in an amount of from 5 wt % to 80 wt % of the cementitious composition.Type: GrantFiled: December 23, 2014Date of Patent: May 28, 2019Assignee: BORAL IP HOLDINGS (AUSTRALIA) PTY LIMITEDInventors: Russell L. Hill, Amitabha Kumar
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Publication number: 20180319942Abstract: Polyurethane composites and methods of preparation are described herein. The polyurethane composites can comprise (a) a polyurethane formed by the reaction of (i) one or more isocyanates selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, and (ii) one or more polyols, (b) an inorganic filler, (c) an inorganic fiber, and (d) an organic fiber. Suitable organic fibers can include polyester fibers. The weight ratio of the inorganic fiber to the organic fiber can be from 1:1 to 20:1. Articles comprising the polyurethane composites described herein are also disclosed.Type: ApplicationFiled: December 17, 2015Publication date: November 8, 2018Applicant: BORAL IP HOLDINGS (AUSTRALIA) PTY LIMITEDInventors: Amitabha KUMAR, Li AI, Sarah FORTENBERRY, Russell L. HILL
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Publication number: 20180305259Abstract: Polyurethane composites and methods of preparing polyurethane composites are described herein. The polyurethane composite can comprise (a) a polyurethane formed by the reaction of (i) one or more isocyanates selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, and (ii) one or more polyols; (b) fly ash comprising 50% or greater by weight, fly ash particles having a particle size of from 0.2 micron to 100 microns; and (c) a coarse filler material comprising 80% or greater by weight, filler particles having a particle size of from greater than 250 microns to 10 mm. The coarse filler material can be present in the composite in an amount of from 1% to 40% by weight, based on the total weight of the composite. The weight ratio of the fly ash to the coarse filler material can be from 9:1 to 200:1.Type: ApplicationFiled: June 29, 2018Publication date: October 25, 2018Applicant: BORAL IP HOLDINGS (AUSTRALIA) PTY LIMITEDInventors: Amitabha KUMAR, Li Al, Russell HILL
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Patent number: 10030126Abstract: Polyurethane composites and methods of preparation are described herein. The polyurethane composites can comprise (a) a polyurethane formed by the reaction of (i) one or more isocyanates selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, and (ii) one or more polyols, (b) a particulate filler having a bulk density of 1 g/cm3 or greater, (c) optionally a fiber material, and (d) a lightweight filler having a bulk density from 0.01 g/cm3 to less than 1 g/cm3. In some examples, the lightweight filler can be selected from expanded perlite, expanded clay, foamed glass, and combinations thereof. Articles such as building materials comprising the polyurethane composites are also disclosed.Type: GrantFiled: June 5, 2015Date of Patent: July 24, 2018Assignee: Boral IP Holdings (Australia) Pty LimitedInventors: Amitabha Kumar, Li Ai, Russell L. Hill
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Patent number: 9944063Abstract: Methods for producing building materials comprising a reinforced substrate are described herein. The method can include providing a substrate having a first surface and an opposed second surface, applying a fabric material to the first surface of the substrate, applying a hydrophobic polymeric woven mesh to the fabric material, applying a coating to the hydrophobic polymeric woven mesh thereby allowing the coating to penetrate the hydrophobic polymeric woven mesh and fabric material, removing the hydrophobic polymeric woven mesh, and curing the coating thereby bonding the fabric material to the first surface of the substrate. The substrate can include a polymeric material. In some embodiments, the substrate can include a polyurethane foam. The substrate can further include a filler. The hydrophobic polymeric woven mesh used in the building materials can be derived from alkylene monomers.Type: GrantFiled: May 23, 2016Date of Patent: April 17, 2018Assignee: Boral IP Holdings (Australia) Pty LimitedInventors: Hamed Lakrout, Amitabha Kumar, Li Ai, Russell Hill, Matthew Yatco Meneses
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Publication number: 20170267585Abstract: Polyurethane composites and methods of preparing polyurethane composites are described herein. The polyurethane composite can comprise (a) a polyurethane formed by the reaction of (i) one or more isocyanates selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, and (ii) one or more polyols; (b) fly ash comprising 50% or greater by weight, fly ash particles having a particle size of from 0.2 micron to 100 microns; and (c) a coarse filler material comprising 80% or greater by weight, filler particles having a particle size of from greater than 250 microns to 10 mm. The coarse filler material can be present in the composite in an amount of from 1% to 40% by weight, based on the total weight of the composite. The weight ratio of the fly ash to the coarse filler material can be from 9:1 to 200:1.Type: ApplicationFiled: November 12, 2015Publication date: September 21, 2017Inventors: Amitabha KUMAR, Li AI, Russell HILL
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Patent number: 9752015Abstract: Polymeric composites and methods for preparing the composites are described herein. The polymeric composites can comprise a polymer, an inorganic filler, and a plurality of short length fibers. The polymer in the composites can include homopolymers and copolymers and can also include plastics, resins, elastomers, thermoplastics, thermosets, and hot melts. The inorganic filler can be fly ash. The short length fibers can have an average length of 650 ?m or less. Methods for making the polymeric composites are also described.Type: GrantFiled: August 5, 2014Date of Patent: September 5, 2017Assignee: Boral IP Holdings (Australia) PTY LimitedInventors: Amitabha Kumar, Guy Crocco, Russell L. Hill, Li Ai, Jacob Myers
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Publication number: 20170114211Abstract: Polyurethane composites and methods of preparation are described herein. The polyurethane composites can comprise (a) a polyurethane formed by the reaction of (i) one or more isocyanates selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, and (ii) one or more polyols, (b) a particulate filler having a bulk density of 1 g/cm3 or greater, (c) optionally a fiber material, and (d) a lightweight filler having a bulk density from 0.01 g/cm3 to less than 1 g/cm3. In some examples, the lightweight filler can be selected from expanded perlite, expanded clay, foamed glass, and combinations thereof. Articles such as building materials comprising the polyurethane composites are also disclosed.Type: ApplicationFiled: June 5, 2015Publication date: April 27, 2017Inventors: Amitabha Kumar, Li Ai, Russell L. Hill
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Publication number: 20160340247Abstract: Cementitious compositions and methods for producing the cementitious compositions are described herein. The methods can include mixing a compound of the general formula MaSibXcOd, MaSibXcOd(OH)e, MaSibXc(OH)e, or MaSibXc(OH)e.(H2O)f, wherein M comprises a metal that can react with carbon dioxide in a carbonation reaction to form a carbonate, Si forms an oxide during the carbonation reaction, X is an element other than M or Si, a, b, d, e, and f are greater than zero, and c is zero or greater, with a rapid setting hydraulic cement to produce a cementitious mixture. The methods can further include hydrating the cementitious mixture and carbonating the cementitious mixture. Carbonating the cementitious mixture can occur simultaneously with hydrating the cementitious mixture or subsequent to hydrating the cementitious mixture. In some embodiments, the non-hydraulic cement can comprise wollastonite. The hydraulic cement can be in an amount of from 5 wt % to 80 wt % of the cementitious composition.Type: ApplicationFiled: December 23, 2014Publication date: November 24, 2016Inventors: Russell L. Hill, Amitabha Kumar
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Publication number: 20160280890Abstract: Polymeric composites and methods for preparing the composites are described herein. The polymeric composites can comprise a polymer, an inorganic filler, and a plurality of short length fibers. The polymer in the composites can include homopolymers and copolymers and can also include plastics, resins, elastomers, thermoplastics, thermosets, and hot melts. The inorganic filler can be fly ash. The short length fibers can have an average length of 650 ?m or less. Methods for making the polymeric composites are also described.Type: ApplicationFiled: August 5, 2014Publication date: September 29, 2016Inventors: Amitabha KUMAR, Guy CROCCO, Russell L. HILL, Li AI, Jacob MYERS
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Patent number: 9023149Abstract: A cementitious mixture for high-volume production of masonry products comprises a hydraulic binder accounting for 20 wt % or more of the cementitious mixture, the hydraulic binder comprising 75 to 100 wt % Class C fly ash with a CaO equivalent content of at least 15% by weight. The cementitious mixture also comprises one or more aggregates, and a set control system.Type: GrantFiled: November 22, 2013Date of Patent: May 5, 2015Assignee: Calstar Products, Inc.Inventors: Kyle Scott Douglas, Dustin Marion Hulbert, Amitabha Kumar, Thomas McClure Pounds, Julie Robyn Rapoport, Michael Alexander Telischak, Susanne Rebecca Williams
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Patent number: 8747549Abstract: A cementitious mixture for high-volume production of masonry products comprises a hydraulic binder accounting for 20 wt % or more of the cementitious mixture, the hydraulic binder comprising 75 to 100 wt % Class C fly ash with a CaO equivalent content of at least 15% by weight. The cementitious mixture also comprises one or more aggregates, and a set control system.Type: GrantFiled: November 22, 2013Date of Patent: June 10, 2014Assignee: Calstar Products, Inc.Inventors: Kyle Scott Douglas, Dustin Marion Hulbert, Amitabha Kumar, Thomas McClure Pounds, Julie Robyn Rapoport, Michael Alexander Telischak, Susanne Rebecca Williams
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Patent number: 8617308Abstract: A cementitious mixture for high-volume production of masonry products comprises a hydraulic binder accounting for 20 wt % or more of the cementitious mixture, the hydraulic binder comprising 75 to 100 wt % Class C fly ash with a CaO equivalent content of at least 15% by weight. The cementitious mixture also comprises one or more aggregates, and a set control system.Type: GrantFiled: June 30, 2011Date of Patent: December 31, 2013Assignee: Calstar Products, Inc.Inventors: Kyle Scott Douglas, Dustin Marion Hulbert, Amitabha Kumar, Thomas McClure Pounds, Julie Robyn Rapoport, Michael Alexander Telischak, Susanne Rebecca Williams
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Patent number: 8617438Abstract: A cementitious mixture for high-volume production of masonry products comprises a hydraulic binder accounting for 20 wt % or more of the cementitious mixture, the hydraulic binder comprising 75 to 100 wt % Class C fly ash with a CaO equivalent content of at least 15% by weight. The cementitious mixture also comprises one or more aggregates, and a set control system.Type: GrantFiled: June 11, 2013Date of Patent: December 31, 2013Assignee: Calstar Products, Inc.Inventors: Kyle Scott Douglas, Dustin Marion Hulbert, Amitabha Kumar, Thomas McClure Pounds, Julie Robyn Rapoport, Michael Alexander Telischak, Susanne Rebecca Williams
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Patent number: 8574360Abstract: Cementitious formulations and their products with enhanced reactivity are provided. Formulations in certain embodiments may include at least one calcium source, a reactant and a filler in a hydrated environment, wherein the reactant, in one form, is crystalline silica that has been modified for reactivity. Enhancement of a reactant may include one or more modifications to its content, grind and/or the cement to silica ratio, as well as addition of one or more additives in the formulation, additives in the form of at least one alumina source, defoamer, catalyst and/or a clay.Type: GrantFiled: February 24, 2012Date of Patent: November 5, 2013Assignee: James Hardie Technology LimitedInventors: Xiangdong Feng, Meiling Gong, Chinmay Avinash Gowardhan, Chongjun Jiang, Michael John Julius, Amitabha Kumar, Shannon Marie Labernik, Xiangyuan Liu, Liyan Ma, Basil Taha Naji, Kalynne Hitzeman Paradis, David John Sharman
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Patent number: 8209927Abstract: A structural fiber cement sheet containing cementitious matrix and reinforcing cellulose fibers distributed throughout the matrix having a dry density less than 1.25 g/cm3, a thickness less than 0.7500 in, and able to withstand uniform loads of 200 psf or greater according to test method of Section 6.4.2.4 of PS2 and with a deflection of less than 0.067 inches at 60 psf when spaced on a span of 24 inches or less on center.Type: GrantFiled: December 20, 2007Date of Patent: July 3, 2012Assignee: James Hardie Technology LimitedInventors: John Sydney Cottier, December Rose Cowen, Remi Dunoyer, Steven Duselis, James Albert Gleeson, Amitabha Kumar
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Publication number: 20120152154Abstract: Cementitious formulations and their products with enhanced reactivity are provided. Formulations in certain embodiments may include at least one calcium source, a reactant and a filler in a hydrated environment, wherein the reactant, in one form, is crystalline silica that has been modified for reactivity. Enhancement of a reactant may include one or more modifications to its content, grind and/or the cement to silica ratio, as well as addition of one or more additives in the formulation, additives in the form of at least one alumina source, defoamer, catalyst and/or a clay.Type: ApplicationFiled: February 24, 2012Publication date: June 21, 2012Applicant: JAMES HARDIE TECHNOLOGY LIMITEDInventors: Xiangdong Feng, Meiling Gong, Chinmay Avinash Gowardhan, Chongjun Jiang, Michael John Julius, Amitabha Kumar, Shannon Marie Labernik, Xiangyuan Liu, Liyan Ma, Basil Taha Naji, Kalynne Hitzeman Paradis, David John Sharman