Yes, if you're filing an RCE after the 3-month deadline of the Final Office Action, which is sounds like you are, you need to pay the extension of...

Are there probono patent attorneys or attorneys that can take a percentage of future sales of the product

There are pro bono patent services available. The U.S. Patent Office has a Law School Clinic Certification program that allows law students (under...

It is possible to sue to collect past damages after a patent expires. However, there is a limit. Under the patent laws, you generally cannot...

Would the fact that the utility patent (PCT) has been exposed to the public make it impossible to protect it as a design patent?

A U.S. design patent application can claim priority to an international PCT application (see MPEP 1504.20). If your PCT application is still...