Patents by Inventor Tirtha Chatterjee
Tirtha Chatterjee 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: 20230117014Abstract: A method for fractionating a sulfuric acid process stream having at least 1 wt % sulfuric acid, using a treatment system comprising three filtration assemblies each having membranes that are suitable to pass less than 10% salt in a standard test such that average passage of sulfuric acid from the first and third filtration assemblies is less than 30% and average passage of sulfuric acid from second filtration assembly is more than 70%. The system produces a fraction of the stream with a pH between 4 and 10, and a second fraction that contains at least 20 weight percent of sulfuric acid.Type: ApplicationFiled: March 15, 2021Publication date: April 20, 2023Inventors: Tirtha Chatterjee, Steven Jons
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Publication number: 20220363946Abstract: A liquid applied, silicone-based air and water barrier coating composition and its use as a silicone-based air and water barrier is provided. The barrier is generally vapour permeable and suitable for the construction industry. The liquid coating composition generally has a shelf-life of at least 15 months. The liquid coating composition comprises: (i) a crosslinked polysiloxane dispersion comprising (c) a surfactant and (d) water; (ii) one or more rheology modifiers in an amount of from 0.25 to 5 wt. % of the composition; and (iii) an acidic pH stable colloidal silica in an amount of from 15 to 30 wt. % of the composition; and optionally (iv) one or more stabilizers.Type: ApplicationFiled: July 1, 2020Publication date: November 17, 2022Inventors: Tirtha CHATTERJEE, Milton H. REPOLLET-PEDROSA, Michael P. TATE, Yiyong HE, Andrea WATTS
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Publication number: 20220363945Abstract: A liquid applied, silicone-based air and water barrier coating composition and its use as a silicone-based air and water barrier is provided. The barrier is generally vapour permeable and suitable for the construction industry. The liquid coating composition generally has a shelf-life of at least 9 months. The liquid coating composition comprises: (i) a crosslinked polysiloxane dispersion comprising (c) a surfactant and (d) water; (ii) a combination of rheology modifiers and at least one of the following ingredients: (iii) one or more fillers and/or (iv) one or more stabilizers.Type: ApplicationFiled: July 1, 2020Publication date: November 17, 2022Inventors: Michael P. TATE, Zhifeng BAI, Jodi M. MECCA, Tirtha CHATTERJEE, Yiyong HE, Michael BRASSEUR, Sudhakar BALIJEPALLI, John J. RABASCO
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Publication number: 20200260770Abstract: Provided is a composition comprising (a) 0.5% to 15% okara or whole soy or a mixture thereof, by weight based on the weight of the composition, and (b) 0.1% to 1.4% one or more cellulose derivative selected from one or more methylcelluloses, one or more hydroxypropylmethylcelluloses, and mixtures thereof.Type: ApplicationFiled: December 13, 2016Publication date: August 20, 2020Inventors: Yongfu Li, Tirtha Chatterjee, Puspendu Deo, Mark W. Beach, Matthew Larive, Dev Barpanda
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Patent number: 10577432Abstract: Provided is a method of making methylcellulose-type ether in powder form, said method comprising (a) providing a solution of said methylcellulose-type ether in water, and (b) then separating said methylcellulose-type ether from said water to produce dried methylcellulose-type ether, with the proviso that either (i) step (b) produces said methylcellulose-type ether in powder form, or (ii) after step (b), said method additionally comprises a step (c) of subjecting said dried methylcellulose-type ether to mechanical stress to produce said methylcellulose-type ether in powder form.Type: GrantFiled: May 26, 2016Date of Patent: March 3, 2020Assignee: Dow Global Technologies LLCInventors: Roland Adden, Tirtha Chatterjee, Matthias Knarr, Meinolf Brackhagen
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Publication number: 20190021383Abstract: Provided is a composition which comprises (a) okara or whole soy or a mixture thereof, and (b) a fiber-containing pectin product or pectin, wherein the weight ratio between components (a) and (b) is from 0.1:1 to 75:1. The composition is useful for increasing the cohesion of solid food, such as soy patties.Type: ApplicationFiled: March 28, 2017Publication date: January 24, 2019Inventors: Puspendu Deo, Yongfu Li, Tirtha Chatterjee, Ryan Stempek
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Publication number: 20180134812Abstract: Provided is a method of making methylcellulose-type ether in powder form, said method comprising (a) providing a solution of said methylcellulose-type ether in water, and (b) then separating said methylcellulose-type ether from said water to produce dried methylcellulose-type ether, with the proviso that either (i) step (b) produces said methylcellulose-type ether in powder form, or (ii) after step (b), said method additionally comprises a step (c) of subjecting said dried methylcellulose-type ether to mechanical stress to produce said methylcellulose-type ether in powder form.Type: ApplicationFiled: May 26, 2016Publication date: May 17, 2018Inventors: Roland Adden, Tirtha Chatterjee, Matthias Knarr, Meinolf Brackhagen
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Publication number: 20180134811Abstract: Provided is a composition in powder form comprising methylcellulose, wherein said composition has a powder x-ray diffraction spectrum at source x-ray wavelength of 1.789 ? showing a peak at a 2? value between 14.5 and 16.5 degrees having intensity level Ipeak and a trough at a 2? value between 16.51 and 20 degrees having intensity level Itrough, wherein a peak index PIndex is defined as PIndex=(Ipeak?Itrough)/Itrough and wherein said PIndex is 0.01 or greater.Type: ApplicationFiled: May 26, 2016Publication date: May 17, 2018Inventors: Roland Adden, Tirtha Chatterjee, Matthias Knarr, Meinolf Brackhagen
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Patent number: 7951864Abstract: The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes.Type: GrantFiled: October 13, 2009Date of Patent: May 31, 2011Assignee: University of HoustonInventors: Ramanan Krishnamoorti, Tirtha Chatterjee, Koray Yurekli
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Patent number: 7893148Abstract: The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes.Type: GrantFiled: August 24, 2006Date of Patent: February 22, 2011Assignee: University of HoustonInventors: Ramanan Krishnamoorti, Tirtha Chatterjee, Koray Yurekli
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Publication number: 20100090175Abstract: The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes.Type: ApplicationFiled: October 13, 2009Publication date: April 15, 2010Applicant: The University of HoustonInventors: Ramanan Krishnamoorti, Tirtha Chatterjee, Koray Yurekli
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Publication number: 20090221738Abstract: The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes.Type: ApplicationFiled: August 24, 2006Publication date: September 3, 2009Applicant: NANORIDGE MATERIALS, INC.Inventors: Ramanan Krishnamoorti, Tirtha Chatterjee, Koray Yurekli