I don't think so, but then again, what's it going to do for you? If it's important that a ticket hasn't been addressed in X amount of time, please follow up, there at least the following ways to handle it:
1) Don't do it. Close tickets and let the client open them up.
2) Don't leave them open. Set a pending autoclose time if you're the last one to send a message. Even if you're waiting for a client's response, any reasonably long time period is enough to close the ticket ... After 5 days, for instance, it probably isn't still an issue.
3) Use a Generic Agent to check if ticket is unchanged in state "open" or "waiting" for X time period, then change the state to "kinda old", run a notification event against the state change, then GA see how unchanged state in "kinda old" exceeds time period length Y. Change the state again to "Hey, this is getting stinky". Notification event. Run daily/as often as someone needs to be reminded.
4) Read the tickets.
5) follow up anyway.