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).

  • Patent number: 10377868
    Abstract: 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: Grant
    Filed: December 17, 2015
    Date of Patent: August 13, 2019
    Assignee: BORAL IP HOLDINGS (AUSTRALIA) PTY LIMITED
    Inventors: Amitabha Kumar, Li Ai, Sarah Fortenberry, Russell L. Hill
  • Publication number: 20190241471
    Abstract: 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: Application
    Filed: April 12, 2019
    Publication date: August 8, 2019
    Applicant: Boral IP Holdings (Australia) PTY Limited
    Inventors: Russell L. HILL, Amitabha KUMAR
  • Publication number: 20190225800
    Abstract: 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: Application
    Filed: September 29, 2016
    Publication date: July 25, 2019
    Applicant: BORAL IP HOLDINGS (AUTRALIA) PTY LIMITED
    Inventors: Amitabha KUMAR, Cassandra HILL, Li Al
  • Patent number: 10301217
    Abstract: 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: Grant
    Filed: December 23, 2014
    Date of Patent: May 28, 2019
    Assignee: BORAL IP HOLDINGS (AUSTRALIA) PTY LIMITED
    Inventors: Russell L. Hill, Amitabha Kumar
  • Publication number: 20180319942
    Abstract: 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: Application
    Filed: December 17, 2015
    Publication date: November 8, 2018
    Applicant: BORAL IP HOLDINGS (AUSTRALIA) PTY LIMITED
    Inventors: Amitabha KUMAR, Li AI, Sarah FORTENBERRY, Russell L. HILL
  • Publication number: 20180305259
    Abstract: 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: Application
    Filed: June 29, 2018
    Publication date: October 25, 2018
    Applicant: BORAL IP HOLDINGS (AUSTRALIA) PTY LIMITED
    Inventors: Amitabha KUMAR, Li Al, Russell HILL
  • Patent number: 10030126
    Abstract: 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: Grant
    Filed: June 5, 2015
    Date of Patent: July 24, 2018
    Assignee: Boral IP Holdings (Australia) Pty Limited
    Inventors: Amitabha Kumar, Li Ai, Russell L. Hill
  • Patent number: 9944063
    Abstract: 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: Grant
    Filed: May 23, 2016
    Date of Patent: April 17, 2018
    Assignee: Boral IP Holdings (Australia) Pty Limited
    Inventors: Hamed Lakrout, Amitabha Kumar, Li Ai, Russell Hill, Matthew Yatco Meneses
  • Publication number: 20170267585
    Abstract: 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: Application
    Filed: November 12, 2015
    Publication date: September 21, 2017
    Inventors: Amitabha KUMAR, Li AI, Russell HILL
  • Patent number: 9752015
    Abstract: 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: Grant
    Filed: August 5, 2014
    Date of Patent: September 5, 2017
    Assignee: Boral IP Holdings (Australia) PTY Limited
    Inventors: Amitabha Kumar, Guy Crocco, Russell L. Hill, Li Ai, Jacob Myers
  • Publication number: 20170114211
    Abstract: 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: Application
    Filed: June 5, 2015
    Publication date: April 27, 2017
    Inventors: Amitabha Kumar, Li Ai, Russell L. Hill
  • Publication number: 20160340247
    Abstract: 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: Application
    Filed: December 23, 2014
    Publication date: November 24, 2016
    Inventors: Russell L. Hill, Amitabha Kumar
  • Publication number: 20160280890
    Abstract: 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: Application
    Filed: August 5, 2014
    Publication date: September 29, 2016
    Inventors: Amitabha KUMAR, Guy CROCCO, Russell L. HILL, Li AI, Jacob MYERS
  • Patent number: 9023149
    Abstract: 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: Grant
    Filed: November 22, 2013
    Date of Patent: May 5, 2015
    Assignee: Calstar Products, Inc.
    Inventors: Kyle Scott Douglas, Dustin Marion Hulbert, Amitabha Kumar, Thomas McClure Pounds, Julie Robyn Rapoport, Michael Alexander Telischak, Susanne Rebecca Williams
  • Patent number: 8747549
    Abstract: 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: Grant
    Filed: November 22, 2013
    Date of Patent: June 10, 2014
    Assignee: Calstar Products, Inc.
    Inventors: Kyle Scott Douglas, Dustin Marion Hulbert, Amitabha Kumar, Thomas McClure Pounds, Julie Robyn Rapoport, Michael Alexander Telischak, Susanne Rebecca Williams
  • Patent number: 8617438
    Abstract: 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: Grant
    Filed: June 11, 2013
    Date of Patent: December 31, 2013
    Assignee: Calstar Products, Inc.
    Inventors: Kyle Scott Douglas, Dustin Marion Hulbert, Amitabha Kumar, Thomas McClure Pounds, Julie Robyn Rapoport, Michael Alexander Telischak, Susanne Rebecca Williams
  • Patent number: 8617308
    Abstract: 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: Grant
    Filed: June 30, 2011
    Date of Patent: December 31, 2013
    Assignee: Calstar Products, Inc.
    Inventors: Kyle Scott Douglas, Dustin Marion Hulbert, Amitabha Kumar, Thomas McClure Pounds, Julie Robyn Rapoport, Michael Alexander Telischak, Susanne Rebecca Williams
  • Patent number: 8574360
    Abstract: 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: Grant
    Filed: February 24, 2012
    Date of Patent: November 5, 2013
    Assignee: James Hardie Technology Limited
    Inventors: 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
  • Patent number: 8209927
    Abstract: 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: Grant
    Filed: December 20, 2007
    Date of Patent: July 3, 2012
    Assignee: James Hardie Technology Limited
    Inventors: John Sydney Cottier, December Rose Cowen, Remi Dunoyer, Steven Duselis, James Albert Gleeson, Amitabha Kumar
  • Publication number: 20120152154
    Abstract: 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: Application
    Filed: February 24, 2012
    Publication date: June 21, 2012
    Applicant: JAMES HARDIE TECHNOLOGY LIMITED
    Inventors: 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