<The terms filing date and priority date are often used interchangeably, but they are not the same. The filing date is the date when a patent application is first filed at a patent office. The priority date, sometimes called the "effective filing date", is the date used to establish the novelty and/or obviousness of a particular invention relative to other art.

The priority date may be earlier than the actual filing date of an application. If an application claims priority to an earlier parent application, then its priority date may be the same as the parent.>

So how does one find the priority date? I'm looking, but if anyone knows ......

Opty