Patents by Inventor Rasika DIAS

Rasika DIAS 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).

  • SOLID-STATE SILVER SORBENTS FOR OLEFIN ADSORPTION
    Publication number: 20250115535
    Abstract: Disclosed herein are compositions for olefin adsorption comprising a trimeric [Ag—R]3 compound that undergoes a reversible transformation to trimeric [Ag-R·(alkene)]3 and/or dimeric [Ag-R·(alkene)]2. The reversible transformation allows one to break adsorbent design trade-offs and achieve low heat of adsorption while retaining high selectivity and uptake. Additionally disclosed is a method to separate alkenes from a mixture.
    Type: Application
    Filed: October 10, 2024
    Publication date: April 10, 2025
    Inventor: Rasika Dias
  • SOLID-STATE COPPER(I) SORBENTS FOR OLEFIN SEPARATIONS
    Publication number: 20240367089
    Abstract: Disclosed herein is a process for separating a hydrocarbon feed gas mixture comprising constituents including ethylene to produce a separated ethylene product. The disclosed process employs a solid-state ethylene sorbent and temperature and/or pressure swing adsorption and membrane separation and demonstrates a methodology to reduce the net heat of reaction during the adsorption of ethylene onto an adsorbent.
    Type: Application
    Filed: July 17, 2024
    Publication date: November 7, 2024
    Inventors: Rasika DIAS, Naleen B. JAYARATNA, Richard D. NOBLE, Matthew G. COWAN, Devaborniny PARASAR
  • MOLECULAR SORBENT COMPOSITIONS AND METHODS OF USE THEREOF
    Publication number: 20240309023
    Abstract: Provided herein is a molecular sorbent based on copper that provides high-purity separation, such as separation of ethylene from ethylene-ethane mixtures and propylene from propylene-propane mixtures. Further provided herein are compositions thereof, methods of manufacturing these, and methods of use thereof.
    Type: Application
    Filed: July 6, 2022
    Publication date: September 19, 2024
    Inventors: Rasika DIAS, Anurag Noonikara POYIL, Banglin CHEN, Hui CUI
  • Solid-state copper(I) sorbents for olefin separations
    Patent number: 12070718
    Abstract: Disclosed herein is a process for separating a hydrocarbon feed gas mixture comprising constituents including ethylene to produce a separated ethylene product. The disclosed process employs a solid-state ethylene sorbent and temperature and/or pressure swing adsorption and membrane separation and demonstrates a methodology to reduce the net heat of reaction during the adsorption of ethylene onto an adsorbent.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: August 27, 2024
    Assignees: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM, THE REGENTS OF THE UNIVERSITY OF COLORADO, a body corporate
    Inventors: Rasika Dias, Naleen B. Jayaratna, Richard D. Noble, Matthew G. Cowan, Devaborniny Parasar
  • FLUORINATED POLY(PYRIDYL)-BORATE LIGANDS
    Publication number: 20240254146
    Abstract: Disclosed herein are poly(pyridyl)borate ligands and metal complexes comprising the poly(pyridyl)borate ligands. Also disclosed herein are methods of making and methods of using said poly(pyridyl)borate ligands and metal complexes comprising the poly(pyridyl)borate ligands. Also disclosed herein are methods of preparing a poly(pyridyl)borate ligand comprising reacting a boron precursor comprising a trifluoroborate to form the poly(pyridyl)borate ligand.
    Type: Application
    Filed: December 22, 2023
    Publication date: August 1, 2024
    Inventors: Rasika Dias, Mukundam Vanga
  • Selective adsorption of gaseous alkenes into non-porous copper(I) complexes: controlling heat of adsorption and loading pressure
    Patent number: 11517877
    Abstract: Disclosed are air-stable small-molecule adsorbents trimeric [Cu—Br]3 and [Cu—H]3 that undergo a reversible solid-state molecular rearrangements to [Cu—Br.(alkene)]2 and [Cu—H.(alkene)]2 dimers. The reversible solid-state rearrangement allows one to break adsorbent design trade-offs and achieve low heat of adsorption while retaining high selectivity and uptake.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: December 6, 2022
    Assignees: Board of Regents, The University of Texas System, University of Canterbury
    Inventors: Rasika Dias, Matthew Greig Cowan, Devaborniny Parasar
  • SELECTIVE ADSORPTION OF GASEOUS ALKENES INTO NON-POROUS COPPER(I) COMPLEXES: CONTROLLING HEAT OF ADSORPTION AND LOADING PRESSURE
    Publication number: 20210394155
    Abstract: Disclosed are air-stable small-molecule adsorbents trimeric [Cu—Br]3 and [Cu—H]3 that undergo a reversible solid-state molecular rearrangements to [Cu—Br.(alkene)]2 and [Cu—H.(alkene)]2 dimers. The reversible solid-state rearrangement allows one to break adsorbent design trade-offs and achieve low heat of adsorption while retaining high selectivity and uptake.
    Type: Application
    Filed: June 23, 2021
    Publication date: December 23, 2021
    Inventors: Rasika Dias, Matthew Greig Cowan, Devaborniny Parasar
  • SOLID-STATE COPPER(I) SORBENTS FOR OLEFIN SEPARATIONS
    Publication number: 20210387134
    Abstract: Disclosed herein is a process for separating a hydrocarbon feed gas mixture comprising constituents including ethylene to produce a separated ethylene product. The disclosed process employs a solid-state ethylene sorbent and temperature and/or pressure swing adsorption and membrane separation and demonstrates a methodology to reduce the net heat of reaction during the adsorption of ethylene onto an adsorbent.
    Type: Application
    Filed: October 15, 2019
    Publication date: December 16, 2021
    Inventors: Rasika DIAS, Naleen B. JAYARATNA, Richard D. NOBLE, Matthew G. COWAN, Devaborniny PARASAR
  • Poly-halogenated triazapentadiene compositions
    Patent number: 7893288
    Abstract: A new class of fluorinated or polyhalogenated triazepentadienes are disclosed. The synthesized triazapentadienes are thermally stable, soluble in typical solvents and have several metal binding sites for complexation with metal ions. The compounds are prepared as colorless crystalline solids. Synthesis takes advantage of a reaction with triethylamine. Synthesized triazapentadienes (with and without complexed metals) inhibit bacterial growth of both Gram positive and Gram-negative bacteria.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: February 22, 2011
    Assignee: Board of Regents, The University of Texas System
    Inventors: H. V. Rasika Dias, Lorraine G. van Waasbergen, Jaime A. Flores
  • POLY(3,4-ETHYLENEDIOXYTHIOPHENE)
    Publication number: 20100282998
    Abstract: The present invention relates to a method of synthesizing poly(3,4-ethylenedioxythiophene), PEDOT in a reaction medium, an acid, an oxidant and an aqueous polyelectrolyte, and compositions thereof. The method is non-stoichiometric and provides no by-products, except water, or solid waste requiring post treatment. The method provides high yields of a composition that exhibits high conductivity.
    Type: Application
    Filed: November 20, 2008
    Publication date: November 11, 2010
    Inventors: H. V. Rasika Dias, Milan K. Dissanayake Mudiyanselage
  • POLY-HALOGENATED TRIAZAPENTADIENE COMPOSITIONS
    Publication number: 20100145088
    Abstract: A new class of fluorinated or polyhalogenated triazepentadienes are disclosed. The synthesized triazapentadienes are thermally stable, soluble in typical solvents and have several metal binding sites for complexation with metal ions. The compounds are prepared as colorless crystalline solids. Synthesis takes advantage of a reaction with triethylamine. Synthesized triazapentadienes (with and without complexed metals) inhibit bacterial growth of both Gram positive and Gram-negative bacteria.
    Type: Application
    Filed: January 20, 2010
    Publication date: June 10, 2010
    Inventors: H.V. Rasika Dias, Lorraine G. van Waasbergen, Jaime A. Flores
  • Poly-halogenated triazapentadiene compositions
    Patent number: 7667077
    Abstract: A new class of fluorinated or polyhalogenated triazapentadienes are disclosed. The synthesized triazapentadienes are thermally stable, soluble in typical solvents and have several metal binding sites for complexation with metal ions. The compounds are prepared as colorless crystalline solids. Synthesis takes advantage of a reaction with triethylamine. Synthesized triazapentadienes (with and without complexed metals) inhibit bacterial growth of both Gram positive and Gram-negative bacteria.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: February 23, 2010
    Assignee: Board of Regents, The University of Texas
    Inventors: H. V. Rasika Dias, Lorraine G. Van Waasbergen, Jaime A. Flores