What is the AIA DATE?

The AIA DATE refers to the effective date of the America Invents Act (AIA), which is a significant patent reform legislation that changed the landscape of U.S. patent law. The AIA was signed into law on September 16, 2011, but many of its key provisions became effective on March 16, 2013. This date marks the transition from a "first to invent" system to a "first to file" system, which aligns U.S. patent law more closely with the patent systems of other countries.

While the other dates listed are significant in relation to various patent law developments or aspects of the AIA, they do not represent the critical changeover date when the major provisions became effective.