Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10005884 | Methods for purifying 2-aryl-3,3-bis(hydroxyaryl)phthalimidines | Anup Krishnnan Appukuttan Pillai, Shivakumar Konda, Gaurav Mediratta, Salkod Parameshwar Mallika, Pradeep Nadkarni | 2018-06-26 |
| 9340502 | Methods for producing and purifying 2-aryl-3,3-bis(4-hydroxyaryl)phthalimidine compounds, the purified monomers, and polymers derived therefrom | Balakrishnan Ganesan, Kishan Gurram, Salkod Parameshwar Mallika, Arun Kumar, Shubashree Swaminathan | 2016-05-17 |
| 8809486 | Methods for producing and purifying 2-aryl-3,3-bis(4-hydroxyaryl)phthalimidine compounds, the purified monomers, and polymers derived therefrom | Balakrishnan Ganesan, Kishan Gurram, Salkod Parameshwar Mallika, Kumar Arun Satyanarayana, Swaminathan Shubashree | 2014-08-19 |
| 8247523 | Methods for producing and purifying 2-aryl-3,3-bis(4-hydroxyaryl)phthalimidine compounds, the purified monomers, and polymers derived therefrom | Balakrishnan Ganesan, Kishan Gurram, Salkod Parameshwar Mallika, Kumar Arun Satyanarayana, Swaminathan Shubashree | 2012-08-21 |
| 7915430 | Catalytic method for producing phenolphthalein compounds | Shivappa Basappa Halligudi, Gurram Kishan, Salkod Parameshwar Mallika, Bhaskar Veldurthy | 2011-03-29 |
| 7868190 | Method for producing phenolphthalein using a heteropolyacid catalyst | Shivappa Basappa Halligudi, Gurram Kishan, Salkod Parameshwar Mallika, Bhaskar Veldurthy | 2011-01-11 |
| 7838689 | Method for producing phenolphthalein compound using ionic liquid catalyst composition | Dwairath Dhar, Gurram Kishan, Salkod Parameshwar Mallika | 2010-11-23 |
| 7790832 | Methods for purifying 2-aryl-3,3-bis(hydroxyaryl)phthalimidines | Balakrishnan Ganesan, Pradeep Nadkarni, Kumar Arun Satyanarayana, Suresh Shanumgam, Gurram Kishan +1 more | 2010-09-07 |
| 7592464 | Methods for producing and purifying 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine monomers and polycarbonates derived therefrom | Rajshekhar Basale, Hyacinth Mary Bastian, Balakrishnan Ganesan, Gurram Kishan, Pushpa Narayanan +2 more | 2009-09-22 |
| 7563817 | Purified 2-aryl-3,3-bis(hydroxyaryl)phthalimidines | Balakrishnan Ganesan, Pradeep Nadkarni, Kumar Arun Satyanarayana, Suresh Shanmugam, Gurram Kishan +1 more | 2009-07-21 |
| 7371902 | Methods for purifying p,p-bisphenol-A | Ramachandran Kumar, Gomatam Raghavan Ravi, Hyacinth Mary Bastian, Gururaj Sathyanarayana, Sheldon J. Shafer +2 more | 2008-05-13 |