Has anyone had success reviving an abandoned patent (18+ months).

A applicant may revive an application that was unintentionally abandoned for failure to respond to an office action by providing a petition to revive along with 1) the submission that was required required and was not timely filed (the repsonse to the office action); 2) a petition fee ($1,700); 3) a statement that the delay between the due date for submission and the filing of the petition to revive was unintentional. A terminal disclaimer and fee may also be required if you are prosecuting or have obtained a patent for a related application. If the office action in question was a final rejection, the only submission that you can make is a Request for Continued Examination.  If, on the other hand, the office action was a non-final rejection, the submission is simply a full and complete response to that office action. Whether you file in-paper or via the Electronic Filing System is not outcome-determinative. These requirements are generally set forth in 37 CFR 1.137 and MPEP 711.03(c).  My strong recommendation is not to try to revive on your own, but rather to hire a registered patent attorney or agent to prepare the petition for you. For a free initial consultation and firm quote, contact me at 425-533-6132, Claiborne Patent Law Services.