User blog comment:Cloak5000/Question about Atoma/@comment-1212133-20130625234602/@comment-72.175.96.61-20130626002449

I thought as much. However...and I HATE to say "however".....a writer who has done work AC Comics told me directly that he had pitched a story involving Atoma but was informed NOT to use Atoma because Harvey owned the copyrights.

I don't know if it is an issue of AC Comics' simply not wanting to risk any contentions due to the past experience trying to use Charlton characters and the issue with DC Comics. Hard to say.