Is is safe to use a stainless steel pan that has been cleaned with bleach (Comet)?
Can you smell bleach?
If yes, rinse it &amp; use it.
If not, just use it.
Is it stained?
If not, just use it.
If yes, you can remove the staining with bicarbonate paste made with water or Barkeeper's Friend.  


Once any staining is gone, the natural coating [chromium oxide passive layer] will reform.
Just cook with it as normal.