Am I H1B cap exempt?

I got an H1B (1 year validity) VISA stamped from previous employer which got expired in March 2015. I never got an opportunity to travel. I have changed my employer now. Am I H1B cap exempt?

So your H-1 petition was approved sometime in 2013 or 2014. You are eligible for cap-exempt petition for 6 years from original approval date.