Under processes, Action Rule, New Rule, Criteria see if the following settings are what you're looking to accomplish.
Tickets matching ALL of these conditions:
Date > Due > within the next > 12 > Business Hr(s).
Please let me know if I can help any further. Good luck!
I've found that option, the only thing is that you have to set the "Rule Triggering". The Evaluate criteria is only available for "updating" a ticket (by Tech, client, or any update).
I basically need an option: "time trigger" (or anything like it).
Any help appreciated.