Hi Kyle,

Check out what Rui Deng said on this thread:

"There is a feature "recurring notification" on formsconfig -> Email Templates -> Recurring Notification. If you enable this, it would send email notifications daily to the user that has pending tasks.

If you does not like how it works: actually there is no way for email service task to know which user is assigned with task. The only workaround I could think of is using Workflow service task, where you can use SQL query to get the task assignee, and send email to that person. You may refer to https://answers.laserfiche.com/questions/76772/Forms-Inbox-Email-Reminder"

I like his idea of using Workflow to check when a specific user is assigned. Specifically, a workflow on a timer that that repeats x hours. You can even kick it off in the process diagram. 

Another thing to consider using is a 'throw catch' type scenario where you split the process into 2 paths. One path can keep repeating until your criteria is met. At that point, have 'catch' further down the process. If you aren't familiar with these, check them out. They are a little tricky to understand at first, baut are extremely handy:

Hope this helps!