Patnaik passed away at around 9.30 am today, informed his daughter Anita Subhadarshini.
A six-time MLA from Kodala Assembly constituency late Patnaik had handled important portfolios like Finance, Agriculture, and Rural Development in his long stint as minister.
He was a cabinet minister in Biju Patnaik government from 1990 to 1995. Later, he joined the Naveen Patnaik government in 2000.
After remaining a part of Janta Party, Janata Dal and Biju Janata Dal (BJD) for a long time in his career Patnaik had switched to BJP on March 19, 2014.