Patents Assigned to SRF Limited
  • Azeotrope or azeotrope like compositions comprising 1234yf
    Patent number: 11629279
    Abstract: The present invention provides azeotropic or azeotrope-like compositions comprising 1234yf and at least one component selected from a group comprising of R-134, and R-134a. The compositions of the present invention are useful as refrigerants, heat transfer fluids, foam blowing agents, aerosol propellants, and fire suppression and fire extinguishing agents.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: April 18, 2023
    Assignee: SRF LIMITED
    Inventors: Jose George, Sunil Raj, Ambuj Kumar Mishra, Anurag Katiyar, Anurag Jain, Manoj Kumar Mishra, Aditya Sharma
  • Preparation of 2,3,3,3-tetrafluoropropene and intermediates thereof
    Patent number: 11261146
    Abstract: The present invention provides a process for preparation of 2,3,3,3-tetrafluoropropene and intermediates thereof. Owing to its low global warming potential and zero ozone depleting potential, it is been proposed as a replacement for existing chlorofluorocarbons and hydrofluorocarbons as refrigerant.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: March 1, 2022
    Assignee: SRF LIMITED
    Inventors: Sarathy Iyengar, Sridhar Jeyaraman, Karthic Natarajan, Nathan Rajamani, Rahul Saxena, Anurag Jain
  • Process for the preparation of 2,3,3,3-tetrafluoropropene
    Patent number: 10870613
    Abstract: The present invention provides an improved process for preparation of 2,3,3,3-tetrafluoropropene, wherein recyclization of the reaction by-products result in equilibrium between feed and outlet composition.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: December 22, 2020
    Assignee: SRF Limited
    Inventors: Jose George, Sunil Raj, Ambuj Mishra, Anurag Katiyar, Rajdeep Anand
  • Process for preparation of halo substituted benzoic acid compound and intermediates thereof
    Patent number: 10626074
    Abstract: The present invention provides a process for preparation of halo substituted benzoic acid compound of Formula (1) and intermediates thereof.
    Type: Grant
    Filed: March 7, 2018
    Date of Patent: April 21, 2020
    Assignee: SRF Limited
    Inventors: Amardeep Singh, Bhupender Singh, Kapil Kumar, Rajdeep Anand
  • AN IMPROVED PROCESS FOR THE PREPARATION OF 2,3,3,3-TETRAFLUOROPROPENE
    Publication number: 20200010390
    Abstract: The present invention provides an improved process for preparation of 2,3,3,3- tetrafluoropropene, wherein recyclization of the reaction by-products result in equilibrium between feed and outlet composition.
    Type: Application
    Filed: November 24, 2017
    Publication date: January 9, 2020
    Applicant: SRF Limited
    Inventors: Jose George, Sunil Raj, Ambuj Mishra, Anurag Katiyar, Rajdeep Anand
  • Process for the preparation of 2,3,3,3-tetrafluoropropene from methyl chloride and chlorodifluoromethane
    Patent number: 10239804
    Abstract: The present invention relates to a process for preparation of olefins containing fluorine.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: March 26, 2019
    Assignee: SRF LIMITED
    Inventors: Jose George, Rajasekaran Ramanathan, Sunil Raj, Anurag Katiyar, Ambuj Mishra, Rajdeep Anand
  • Process for the preparation of halosubstituted trifluoromethylpyridines
    Patent number: 10227303
    Abstract: The present invention provides a process for the preparation of halosubstituted-6-trifluoromethyl pyridine of Formula I wherein X is a halogen.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: March 12, 2019
    Assignee: SRF Limited
    Inventors: Pushkar Singh Bora, Prabhu Balaji, Chandresh Soni, Kapil Kumar, Rajdeep Anand
  • Process for the preparation of 2-(trihalomethyl) benzamide
    Patent number: 10167250
    Abstract: The present invention relates to a process for preparation of 2-(trihalomethyl) benzamide.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: January 1, 2019
    Assignee: SRF Limited
    Inventors: Surender Dhingra, Kundan Singh Shekhawat, Satish Kumar, Kapil Kumar, Rajdeep Anand
  • Process for the preparation of dibenzenesulfonimide
    Patent number: 10071956
    Abstract: The present invention provides a process for the preparation of dibenzenesulfonimide.
    Type: Grant
    Filed: July 15, 2015
    Date of Patent: September 11, 2018
    Assignee: SRF LIMITED
    Inventors: Thirupathi Arumugam, Mariano Patrick Philips, Dilli Babu, Maheshwaran Chellaiah, Sarathy Iyengar, Rajdeep Anand
  • Process for the preparation of pyrazole derivatives
    Patent number: 9650345
    Abstract: The present invention provides a process for the preparation of N-alkylated fluorine-containing pyrazolecarboxylic acid derivatives of Formula I. The present invention further provides a pyrazole compound of formula IIIa.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: May 16, 2017
    Assignee: SRF LIMITED
    Inventors: Srikant Dakshinamoorthy, Thangaselvam Kamaraj, Sarathy Iyengar, Arumugam Nagappan, Rahul Saxena, Rajdeep Anand
  • Process for the Preparation of Pyrazole Derivatives
    Publication number: 20160244412
    Abstract: The present invention provides a process for the preparation of N-alkylated fluorine-containing pyrazolecarboxylic acid derivatives of Formula I. The present invention further provides a pyrazole compound of formula IIIa.
    Type: Application
    Filed: May 2, 2016
    Publication date: August 25, 2016
    Applicant: SRF LIMITED
    Inventors: Srikant DAKSHINAMOORTHY, Thangaselvam KAMARAJ, Sarathy IYENGAR, Arumugam NAGAPPAN, Rahul SAXENA, Rajdeep ANAND
  • Process for the synthesis of tetrafluoroethanesulfonic acid
    Patent number: 9376379
    Abstract: The present invention provides a process for preparation of tetrafluoroethanesulfonic acid.
    Type: Grant
    Filed: July 29, 2013
    Date of Patent: June 28, 2016
    Assignee: SRF Limited
    Inventors: Sarathy Iyengar, Radha Kumaraswamy, Mariano Patrick Philiphs, Vardaraj Ganeshan, Rahul Saxena, Rajdeep Anand