Patents by Inventor Lalitendu Das

Lalitendu Das 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).

  • Use of metal salts and deep eutectic solvents in a process to solubilize a biomass
    Patent number: 12241104
    Abstract: The present invention also provides for a method to deconstruct a biomass: the method comprising: (a) introducing a solvent to a biomass to dissolve at least part of solid biomass in the solvent, wherein the solvent comprises (i) a metal salt, and (ii) an ionic liquid (IL) or deep eutectic solvent (DES), or mixture thereof, to form a solubilized biomass mixture; (b) optionally introducing an enzyme and/or a microbe to the composition such that the enzyme and/or microbe produce a biofuel and/or chemical compound from the solubilized biomass; and, (c) optionally the biofuel and/or chemical compound is separated from the composition.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: March 4, 2025
    Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC
    Inventors: Lalitendu Das, Hemant Choudhary, John M. Gladden, Blake A. Simmons
  • USE OF POLYAMINES IN THE PRETREATMENT OF BIOMASS
    Publication number: 20240199512
    Abstract: The present invention provides for a method to deconstruct a biomass: the method comprising: (a) introducing a solvent comprising a polyamine, or a mixture of polyamines, to a biomass to dissolve at least part of solid biomass in the solvent, wherein the polyamine is a Brønsted or Lewis base, and/or the polyamine is a hydrogen bond donor and/or acceptor; (b) optionally introducing an enzyme and/or a microbe to the solubilized biomass mixture such that the enzyme and/or microbe produces a sugar from the solubilized biomass mixture; (c) optionally separating the sugar from the solubilized biomass mixture; and (d) optionally separating the lignan from the solubilized biomass mixture.
    Type: Application
    Filed: December 22, 2023
    Publication date: June 20, 2024
    Inventors: Ezinne ACHINIVU, Mood MOHAN, Hemant CHOUDHARY, Lalitendu DAS, Venkataramana R. PIDATALA, Harsha D. MAGURUDENIYA, Kaixuan HUANG, John M. GLADDEN, Blake A. SIMMONS
  • Use of polyamines in the pretreatment of biomass
    Patent number: 11884620
    Abstract: The present invention provides for a method to deconstruct a biomass: the method comprising: (a) introducing a solvent comprising a polyamine, or a mixture of polyamines, to a biomass to dissolve at least part of solid biomass in the solvent, wherein the polyamine is a Brønsted or Lewis base, and/or the polyamine is a hydrogen bond donor and/or acceptor; (b) optionally introducing an enzyme and/or a microbe to the solubilized biomass mixture such that the enzyme and/or microbe produces a sugar from the solubilized biomass mixture; (c) optionally separating the sugar from the solubilized biomass mixture; and (d) optionally separating the lignan from the solubilized biomass mixture.
    Type: Grant
    Filed: December 9, 2021
    Date of Patent: January 30, 2024
    Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, NATIONAL TECHNOLOGY & ENGINEERING SOLUTIONS OF SANDIA, LLC
    Inventors: Ezinne Achinivu, Mood Mohan, Hemant Choudhary, Lalitendu Das, Venkataramana R. Pidatala, Harsha D. Magurudeniya, Kaixuan Huang, John M. Gladden, Blake A. Simmons
  • USE OF POLYAMINES IN THE PRETREATMENT OF BIOMASS
    Publication number: 20220194877
    Abstract: The present invention provides for a method to deconstruct a biomass: the method comprising: (a) introducing a solvent comprising a polyamine, or a mixture of polyamines, to a biomass to dissolve at least part of solid biomass in the solvent, wherein the polyamine is a Bronsted or Lewis base, and/or the polyamine is a hydrogen bond donor and/or acceptor; (b) optionally introducing an enzyme and/or a microbe to the solubilized biomass mixture such that the enzyme and/or microbe produces a sugar from the solubilized biomass mixture; (c) optionally separating the sugar from the solubilized biomass mixture; and (d) optionally separating the lignan from the solubilized biomass mixture.
    Type: Application
    Filed: December 9, 2021
    Publication date: June 23, 2022
    Inventors: Ezinne Achinivu, Mood Mohan, Hemant Choudhary, Lalitendu Das, Venkataramana R. Pidatala, Harsha D. Magurudeniya, Kaixuan Huang, John M. Gladden, Blake A. Simmons
  • USE OF METAL SALTS AND DEEP EUTECTIC SOLVENTS IN A PROCESS TO SOLUBILIZE A BIOMASS
    Publication number: 20210317481
    Abstract: The present invention also provides for a method to deconstruct a biomass: the method comprising: (a) introducing a solvent to a biomass to dissolve at least part of solid biomass in the solvent, wherein the solvent comprises (i) a metal salt, and (ii) an ionic liquid (IL) or deep eutectic solvent (DES), or mixture thereof, to form a solubilized biomass mixture; (b) optionally introducing an enzyme and/or a microbe to the composition such that the enzyme and/or microbe produce a biofuel and/or chemical compound from the solubilized biomass; and, (c) optionally the biofuel and/or chemical compound is separated from the composition.
    Type: Application
    Filed: April 1, 2021
    Publication date: October 14, 2021
    Inventors: Lalitendu Das, Hemant Choudhary, John M. Gladden, Blake A. Simmons
  • Lignin valorization in ionic liquids and deep eutectic solvent via catalysis and biocatalysis
    Patent number: 10723859
    Abstract: This invention relates to a method for extracting valorized compounds from lignin by contacting lignins with an ionic liquid and/or a deep eutectic solvent and adding a catalyst and/or a biocatalyst to assist in breaking down the source material. Converting lignin into high value chemicals adds revenues for a bio-refinery and helps to improve the economic viability of biofuel production.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: July 28, 2020
    Assignee: UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
    Inventors: Jian Shi, Lalitendu Das, Enshi Liu, Joseph C. Stevens
  • LIGNIN VALORIZATION IN IONIC LIQUIDS AND DEEP EUTECTIC SOLVENT VIA CATALYSIS AND BIOCATALYSIS
    Publication number: 20190203012
    Abstract: This invention relates to a method for extracting valorized compounds from lignin by contacting lignins with an ionic liquid and/or a deep eutectic solvent and adding a catalyst and/or a biocatalyst to assist in breaking down the source material. Converting lignin into high value chemicals adds revenues for a bio-refinery and helps to improve the economic viability of biofuel production.
    Type: Application
    Filed: July 17, 2018
    Publication date: July 4, 2019
    Inventors: Jian Shi, Lalitendu Das, Enshi Liu, Joseph C. Stevens