Patents by Inventor Padmesh Venkitasubramanian

Padmesh Venkitasubramanian 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).

  • Publication number: 20220145344
    Abstract: This disclosure provides epimerase enzymes useful for commercial scale production of allulose from fructose. The disclosed enzymes (“epimerase variants”) are variants of Burkholderia multivorans CGD1 xylose isomerase engineered to have improved catalytic activity of about 1.5- to 2-fold compared with the parent enzyme.
    Type: Application
    Filed: August 7, 2019
    Publication date: May 12, 2022
    Applicant: Archer Daniels Midland Company
    Inventors: William Schroeder, Padmesh Venkitasubramanian, Sridhar Govindarajan, Mark Welch
  • Publication number: 20210104442
    Abstract: ZnxZryOz mixed oxide catalysts having improved stability for the conversion of ethanol to isobutene are described, together with methods for making such catalysts.
    Type: Application
    Filed: December 16, 2020
    Publication date: April 8, 2021
    Inventors: Junming Sun, Changjun Liu, Yong Wang, Kevin Martin, Padmesh Venkitasubramanian, Colin Smith
  • Patent number: 10774022
    Abstract: Wholly biobased MTBE and ETBE fuel additive materials are described, together with fuel compositions including such additives and processes for making the wholly biobased MTBE and ETBE using isobutene prepared from acetic acid in the presence of a ZnxZryOz mixed oxide catalyst.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: September 15, 2020
    Assignee: ARCHER DANIELS MIDLAND COMPANY
    Inventors: Junming Sun, Changjun Liu, Yong Wang, Kevin Martin, Padmesh Venkitasubramanian
  • Patent number: 10480018
    Abstract: Disclosed herein are three geneses of proteins herein established to exhibit a fructose to allulose epimerase activity that are useful for production of allulose from fructose at high temperatures and at low pH in the range of 4.5 to 6.0. Two of the three geneses descend phylogenetically from a common ancestral protein defined herein, and these geneses are distinguished from each other by different parental descendant proteins also defined herein. The proteins with high levels of sequence identity to the parental nodes defining from these two geneses generally exhibit higher levels of specific fructose to glucose epimerase activity than prior known fructose to allulose epimerases and exhibit such activity at low pH. A third genus is not defined by phylogenetic origin except by not descending from the same ancestor as the first two geneses but generally exhibit similar levels of fructose to allulose epimerase activities as prior art epimerases described to be useful for fructose to allulose conversion.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: November 19, 2019
    Assignee: ARCHER DANIELS MIDLAND COMPANY
    Inventors: Padmesh Venkitasubramanian, William Schroeder, Mark Welch, Sridhar Govindarajan
  • Publication number: 20190214310
    Abstract: ZnxZryOz mixed oxide catalysts having improved stability for the conversion of ethanol to isobutene are described, together with methods for making such catalysts.
    Type: Application
    Filed: January 3, 2018
    Publication date: July 11, 2019
    Inventors: Junming Sun, Changjun Liu, Yong Wang, Kevin Martin, Padmesh Venkitasubramanian, Colin Smith
  • Patent number: 10155736
    Abstract: A method of making a furan dicarboxylate by means of reacting 2,5-furan dicarboxylic acid (FDCA) with an alcohol or mixture of alcohols in a CO2-predominant atmosphere without the presence of any other acid catalyst is described. The reaction is conducted under conditions that correspond to either supercritical, critical or near-critical temperatures and pressures for the alcohol species and/or CO2 gas.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: December 18, 2018
    Assignee: Archer Daniels Midland Company
    Inventors: Kenneth Stensrud, Padmesh Venkitasubramanian
  • Patent number: 10118886
    Abstract: A process for producing biofuels compounds directly from carboxylic acid esters recovered from a fermentation system is described. The process involves taking a fermentation broth that has been reduced to a dry powder containing free organic acids; reacting the carboxylic acid in the powder with an alcohol solvent under a CO2-containing atmosphere in substantial absence of any other acid catalyst at a reaction temperature and pressure that corresponds to supercritical, critical or near critical conditions for at least one of the alcohol or CO2 to synthesize an ester, then subjecting the ester to either hydrogenolysis or hydrogenation to form a biofuel.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: November 6, 2018
    Assignee: Archer Daniels Midland Company
    Inventors: Kenneth Stensrud, Padmesh Venkitasubramanian
  • Publication number: 20180251749
    Abstract: The present disclosure describes a method of producing allulose from fructose with a novel psicose-3-epimerase enzyme from a Burkholderia species. Once identified and isolated, the psicose-3-epimerase gene was cloned into a novel production strain and evaluated in both benchtop and pilot scale production environments. Evaluation of the in vivo enzyme activity and downstream processing involves immobilization of the enzyme on solid matrix resins, which is discloses herein.
    Type: Application
    Filed: March 25, 2016
    Publication date: September 6, 2018
    Inventor: Padmesh VENKITASUBRAMANIAN
  • Patent number: 9975818
    Abstract: Processes are described for making biobased isoprene, wherein a biobased isobutene prepared from acetic acid in the presence of a catalyst is combined with a formaldehyde source to form a reaction mixture, and the reaction mixture is reacted to yield biobased isoprene. In certain embodiments, methyl-tert-butyl ether prepared by reacting the same biobased isobutene with methanol serves as a formaldehyde source, being oxidatively cracked to produce formaldehyde as well as isobutene for being converted to the biobased isoprene.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: May 22, 2018
    Assignees: Archer Daniels Midland Company, Washington State University
    Inventors: Junming Sun, Changjun Liu, Yong Wang, Kevin Martin, Padmesh Venkitasubramanian
  • Publication number: 20180138094
    Abstract: ZnxZryOz mixed oxide catalysts having improved stability for the conversion of ethanol to isobutene are described, together with methods for making such catalysts.
    Type: Application
    Filed: January 3, 2018
    Publication date: May 17, 2018
    Inventors: Junming Sun, Changjun Liu, Yong Wang, Kevin Martin, Padmesh Venkitasubramanian, Colin Smith
  • Publication number: 20180112244
    Abstract: Disclosed herein are three geneses of proteins herein established to exhibit a fructose to allulose epimerase activity that are useful for production of allulose from fructose at high temperatures and at low pH in the range of 4.5 to 6.0. Two of the three geneses descend phylogenetically from a common ancestral protein defined herein, and these geneses are distinguished from each other by different parental descendant proteins also defined herein. The proteins with high levels of sequence identity to the parental nodes defining from these two geneses generally exhibit higher levels of specific fructose to glucose epimerase activity than prior known fructose to allulose epimerases and exhibit such activity at low pH. A third genus is not defined by phylogenetic origin except by not descending from the same ancestor as the first two geneses but generally exhibit similar levels of fructose to allulose epimerase activities as prior art epimerases described to be useful for fructose to allulose conversion.
    Type: Application
    Filed: May 20, 2016
    Publication date: April 26, 2018
    Inventors: Padmesh Venkitasubramanian, William Schroeder, Mark Welch, Sridhar Govindarajan
  • Patent number: 9914713
    Abstract: The production of organic acids in low-cost, high-efficiency fermentation system makes available a new route to chemical production from biomass. A process for producing a hydrogenation product involving carboxylic acid esters recovered directly from a fermentation process is described.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: March 13, 2018
    Assignee: Archer Daniels Midland Company
    Inventors: Kenneth Stensrud, Padmesh Venkitasubramanian
  • Patent number: 9890131
    Abstract: A method of preparing a glycol mono-ether or mono-acetate, or carbonate involving either one of two pathways from alkylene glycols, HMF or its reduction derivative products (i.e., FDM, bHMTHFs), is provided. In particular, according to one pathway, the alkylene glycol, HMF or FDM, bHMTHFs are reacted with a dialkyl carbonate in the presence of a deprotonating agent, in substantial absence of an extrinsic catalyst, to produce an ether, and subsequently reacting the ether with an acid base. According to the other pathway, alkylene glycols are reacted with an acetate donor in the presence of an acid, base, to generate an alkylene mono-acetate, and etherified with a carbonate in the presence of a deprotonating agent.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: February 13, 2018
    Assignee: Archer Daniels Midland Company
    Inventors: Kenneth Stensrud, Padmesh Venkitasubramanian
  • Publication number: 20170369463
    Abstract: A method of making a furan dicarboxylate by means of reacting 2,5-furan dicarboxylic acid (FDCA) with an alcohol or mixture of alcohols in a CO2-predominant atmosphere without the presence of any other acid catalyst is described. The reaction is conducted under conditions that correspond to either supercritical, critical or near-critical temperatures and pressures for the alcohol species and/or CO2 gas.
    Type: Application
    Filed: August 11, 2017
    Publication date: December 28, 2017
    Inventors: Kenneth Stensrud, Padmesh Venkitasubramanian
  • Publication number: 20170355658
    Abstract: A method of etherifying glycols or other diols by employing renewable reagents is disclosed. In particular, the method involves contacting a diol with an alkylating agent in an alcoholic solvent, catalyzed with a catalyst (carbonic acid) generated in situ (from CO2). The mono- and di-ether products can serve as valued precursors to an array of renewable surfactants, dispersants, and lubricants, among others.
    Type: Application
    Filed: November 19, 2015
    Publication date: December 14, 2017
    Inventors: Chi Cheng Ma, Kenneth Stensrud, Padmesh Venkitasubramanian
  • Patent number: 9834531
    Abstract: A process for recovering and using an organic/carboxylic acid or furanic molecule by means of making an ester of a free carboxylic acid or furanic molecule with an alcohol in carbon dioxide (CO2) without the presence of any other acid catalyst at a reaction temperature and pressure that corresponds to supercritical, critical or near critical conditions for the alcohol and/or CO2 is described. The process can constitute part of a general process of refining carboxylic acids derived from a fermentation broth or use in the production of a variety of chemical compounds, such as C4 platform compounds or polymers.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: December 5, 2017
    Assignee: Archer Daniels Midland Company
    Inventors: Padmesh Venkitasubramanian, Kenneth F. Stensrud
  • Patent number: 9765045
    Abstract: A method of making a furan dicarboxylate by means of reacting 2,5-furan dicarboxylic acid (FDCA) with an alcohol or mixture of alcohols in a CO2-predominant atmosphere without the presence of any other acid catalyst is described. The reaction is conducted under conditions that correspond to either supercritical, critical or near-critical temperatures and pressures for the alcohol species and/or CO2 gas.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: September 19, 2017
    Assignee: Archer Daniels Midland Co.
    Inventors: Kenneth Stensrud, Padmesh Venkitasubramanian
  • Patent number: 9751823
    Abstract: Processes are described for making methacrylic acid via methacrolein from a biobased isobutene, wherein the biobased isobutene is prepared from ethanol or from acetic acid in the presence of a ZnxZryOz mixed oxide catalyst, the biobased isobutene is oxidized to methacrolein and the methacrolein is further oxidized to methacrylic acid.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: September 5, 2017
    Assignees: Archer Daniels midland Co., Washington state University
    Inventors: Junming Sun, Changjun Liu, Yong Wang, Kevin Martin, Padmesh Venkitasubramanian
  • Patent number: 9586923
    Abstract: A process is provided for carrying out an oxidation on a sprayable feed including a furanic substrate to be oxidized and a catalytically effective combination of cobalt, manganese, and bromide components for catalyzing the oxidation of the furanic substrate, which process comprises spraying the feed into a reactor vessel as a mist, supplying an oxidant, reacting the furanic substrate and the oxidant, and managing the exothermic temperature rise due to the reaction through a selection and control of the operating pressure within the reactor vessel. A crude dehydration product from the dehydration of fructose, glucose or both, including 5-hydroxymethylfurfural, can be directly oxidized by the process to produce 2,5-furandicarboxylic acid in surprisingly increased yields.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: March 7, 2017
    Assignees: University of Kansas, Archer Daniels Midland Company
    Inventors: Bala Subramaniam, Xiaobin Zuo, Daryle H. Busch, Padmesh Venkitasubramanian
  • Patent number: 9586194
    Abstract: A process is disclosed for converting acetic acid to isobutene in the presence of a catalyst. In certain embodiments, a ZnxZryOz mixed oxide catalyst is used for carrying out a gas phase process for converting acetic acid to isobutene. In some embodiments, a ZnxZryOz mixed oxide catalyst made by an incipient wetness impregnation method is used and is indicated to be very stable for carrying out the conversion.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: March 7, 2017
    Assignee: Washington State University
    Inventors: Junming Sun, Changjun Liu, Yong Wang, Kevin Martin, Padmesh Venkitasubramanian