Chakraborty GroupIIT Madras Join us

Intellectual property

16 patents.

Filed and granted in India, the United States and via PCT — covering catalysts for poly(lactide) synthesis, metal-free polyester routes, CO₂-to-polycarbonate organocatalysts and PBAT manufacture.

16Total patents
12Granted / approved
3US & PCT filings
15Listed below

Full list

Patents from the CV.

Listed most recent first, as recorded in the curriculum vitae.

  1. 15

    A Method of Synthesis of PBAT Using Group 4 and Group 13 initiators

    Debashis Chakraborty, Sourav Singha Roy, Sriparna Sarkar

    Indian Pat. Appl. 2024, Filed.

  2. 14

    The ROCOP of epoxide and CO₂ to generate aliphatic polycarbonates using simple Organocatalyst

    Debashis Chakraborty, Sourav Singha Roy, Sriparna Sarkar

    Indian Pat. Appl. 2024, IN202441026250. (Approved)

  3. 13

    Synthesis, characterization and catalytic activity of THF coordinated monomeric Group 13 metal isopropoxide isopropanol adduct

    Debashis Chakraborty, Sourav Singha Roy, Sriparna Sarkar

    Indian Pat. Appl. 2024, IN202441006651. (Approved)

  4. 12

    Metal-​free polyester based nano-​drug carrier

    Piyush Kumar Gupta, Anjaneyulu Kummari, Santosh Gupta, Debashis Chakraborty, Rama Shanker Verma

    Indian Pat. Appl. 2019, IN 201841019915 A 20191129. (Approved)

  5. 11

    Metal-​free approach and method for synthesis of polyesters

    Piyush Kumar Gupta, Anjaneyulu Kummari, Santosh Gupta, Debashis Chakraborty, Rama Shanker Verma

    Indian Pat. Appl. 2019, IN 201841019916 A 20191129. (Approved)

  6. 10

    Catalysts for Poly(lactide) synthesis and uses thereof

    Debashis Chakraborty, Swarup Ghosh, Venkatachalam Ramkumar

    US Patent 2018, US 20160053048 A1.

  7. 9

    A process for the preparation of biopolymers

    Debashis Chakraborty, Mrinmay Mandal

    Indian Pat. Appl. 2016, IN 2014KO01271 A 20160610. (Approved)

  8. 8

    Catalysts for poly(lactide) synthesis and uses thereof

    Debashis Chakraborty, Swarup Ghosh, Venkatachalam Ramkumar

    Indian Pat. Appl. 2015, IN 2013CH01338 A 20150116. (Approved)

  9. 7

    Catalysts for poly(lactide) synthesis and uses thereof

    Debashis Chakraborty, Swarup Ghosh, Venkatachalam Ramkumar

    PCT Int. Appl. 2014, WO 2014155213 A2 20141002. (Approved)

  10. 6

    Metal free catalysts for the ring opening polymerization of cyclic esters and lactide

    Debashis Chakraborty, Payal Malik, Ravikumar R. Gowda, Venkatachalam Ramkumar

    Indian Pat. Appl. 2013, IN 2011CH04568 A 20130628. (Approved)

  11. 5

    Metal free catalysts for the ring opening polymerization of cyclic esters and lactide

    Debashis Chakraborty, Payal Malik, Ravikumar R. Gowda, Venkatachalam Ramkumar

    Indian Pat. Appl. 2013, IN 2011CH04571 A 20130628. (Approved)

  12. 4

    Group 4 metal aryloxy compounds

    Ravikumar R. Gowda, Venkatachalam Ramkumar, Debashis Chakraborty

    Indian Pat. Appl. 2012, IN 2011CH01376 A 20121026. (Approved)

  13. 3

    Group 4 metal aryloxy compounds used as polymerization catalyst in lactide polymerization

    Ravikumar R. Gowda, Venkatachalam Ramkumar, Debashis Chakraborty

    Indian Pat. Appl. 2012, IN 2010CH02550 A 20120622. (Approved)

  14. 2

    A method for synthesis of polymers and copolymers

    Ravikumar R. Gowda, Debashis Chakraborty

    Indian Pat. Appl. 2011, IN 2009CH03099 A 20110624. (Approved)

  15. 1

    Polymerization Process Using a Highly Active Catalyst

    Eugene Y.-X. Chen, Debashis Chakraborty

    PCT Int. Appl. 2003, WO 2003000750 A1 20030103.