My workplace bought 5 eMacs (old white CRT kind) with 5 AppleCare(eMac/iMac version) 4-5 years ago. Well no one ever thought to activate the AppleCare. Is it possible to use these AppleCare if we were to buy the new Intel based iMacs?

I called Apple and they weren't even sure. They said to try and activate it but I don't own a new iMac to try.