Resources are available for Illinois residents to help inventors and entrepreneurs learn more about protecting their intellectual property. A provisional patent application allows you to file without a formal patent claim, oath or declaration, or any information disclosure (prior art) statement.The application process. It should take about 16 months from filing date for a response from the US Patent and Trademark Office. This tutorial will focus on patents and the process for securing a patent in the U.S. First, let's consider why we have a patent system? In anterograde embolism, the movement of emboli is in the direction of blood flow. This creates a gap between the aortic wall and the endograft, allowing for antegrade flow. This guide is for informational purposes only and is not intended to provide legal advice or to substitute for the legal advice of an attorney at law.