It’s a sort of sad discussion topic, but it comes up in the Internet discussion groups every few months. Here’s an example:
Do any of you know of countries outside the US that have a “grace period” after a public disclosure of an invention for filing a patent application in the country directed to the invention?
Sad because one wishes that the would-be inventor had consulted competent counsel before permitting the public disclosure to occur.
So, what’s the answer? Wouldn’t it be nice if, all in once place, somebody has compiled a list of countries with grace periods?
WIPO maintains an extensive list of all grace periods.
A PCT filer might wish to use Declaration Five to communicate the grace period claim with respect to particular designations.