The purpose of this guide is to provide you with basic information about filing a utility patent application with the USPTO. A provisional patent application allows you to file without a formal patent claim, oath or declaration, or any information disclosure (prior art) statement.The foramen ovale is a hole in the wall between the left and right atria of every human fetus. This hole allows blood to bypass the fetal lungs. Protecting your intellectual property is a must for any medtech business large or small. Discover how you can do it on a reduced budget. The following is a summary of the examination process at the United States Patent and Trademark Office (USPTO). Yet the functioning of this mechanism remains unknown. Patent ductus arteriosus (PDA) is a persistent opening between the two major blood vessels leading from the heart. To the extent any such item is not in.