Patents by Inventor Venkateswara Rao Surisetty

Venkateswara Rao Surisetty 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).

  • Synthesis of n-(2,4-dinitrophenyl)-4-nitrobenzamide (TNBA) using solid acid catalysts
    Patent number: 11834389
    Abstract: A method of making N-(2,4-dinitrophenyl)-4-nitrobenzamide from a mixture of 2,4-dinitroaniline, 4-nitrobenzoyl chloride, and solid acid catalyst in an organic solvent, wherein the solid acid catalyst is not soluble in the organic solvent, the solid acid catalyst being an acidic clay, an ion exchange resin, a beta zeolite, a sulfonated tetrafluoroethylene-based fluoropolymer-copolymer, or some mixture of these.
    Type: Grant
    Filed: May 18, 2021
    Date of Patent: December 5, 2023
    Assignee: DUPONT SAFETY & CONSTRUCTION, INC.
    Inventors: James A. Schultz, Sourav Kumar Sengupta, Venkateswara Rao Surisetty
  • SYNTHESIS OF N-(2,4-DINITROPHENYL)-4-NITROBENZAMIDE (TNBA) USING SOLID ACID CATALYSTS
    Publication number: 20210387942
    Abstract: A method of making N-(2,4-dinitrophenyl)-4-nitrobenzamide from a mixture of 2,4-dinitroaniline, 4-nitrobenzoyl chloride, and solid acid catalyst in an organic solvent, wherein the solid acid catalyst is not soluble in the organic solvent, the solid acid catalyst being an acidic clay, an ion exchange resin, a beta zeolite, a sulfonated tetrafluoroethylene-based fluoropolymer-copolymer, or some mixture of these.
    Type: Application
    Filed: May 18, 2021
    Publication date: December 16, 2021
    Inventors: James A. Schultz, SOURAV KUMAR SENGUPTA, VENKATESWARA RAO SURISETTY
  • Process to prepare 3-methyl-2-nitrobenzoic acid by air oxidation
    Patent number: 9828328
    Abstract: A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalyst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above. wherein R1 is C1-C7 alkyl, C3-C6 cycloalkyl or C4-C7 alkylcycloalkyl.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: November 28, 2017
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Stephen Ernest Jacobson, Donald J. Dumas, Rupert Spence, Sarah May Crawford, Venkateswara Rao Surisetty
  • PROCESS TO PREPARE 3-METHYL-2-NITROBENZOIC ACID BY AIR OXIDATION
    Publication number: 20170197907
    Abstract: A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalyst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above.
    Type: Application
    Filed: May 29, 2015
    Publication date: July 13, 2017
    Inventors: Stephen Ernest Jacobson, Donald J. Dumas, Rupert Spence, Sarah May Crawford, Venkateswara Rao Surisetty
  • Catalysts for the conversion of synthesis gas to alcohols
    Patent number: 9108183
    Abstract: The present application includes alkali metal-promoted trimetallic catalysts for higher alcohol synthesis from synthesis gas, the catalyst comprising a catalyst of Formula (1): A-M1-M2-M3.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: August 18, 2015
    Assignee: University of Saskatchewan
    Inventors: Ajay Kumar Dalai, Venkateswara Rao Surisetty
  • CATALYSTS FOR THE CONVERSION OF SYNTHESIS GAS TO ALCOHOLS
    Publication number: 20120283342
    Abstract: The present application includes alkali metal-promoted trimetallic catalysts for higher alcohol synthesis from synthesis gas, the catalyst comprising a catalyst of Formula (1): A-M1-M2-M3.
    Type: Application
    Filed: April 27, 2012
    Publication date: November 8, 2012
    Applicant: UNIVERSITY OF SASKATCHEWAN
    Inventors: Ajay Kumar Dalai, Venkateswara Rao Surisetty