Nope! Mint means never used so no cancellation on the stamp. Some of your stamps may have gum on the back, but a cancellation on the front. These would be called CTO's (Cancelled to Order) and considered used. Your stamps do appear to be in excellent condition!
Thanks for the clarification. I was describing as I saw others described. I went through and changed my descriptions for the other postings. My stash of stamps are almost all depleted.