Under United States patent law, a provisional application is a...

Under United States patent law, a provisional application is a legal document filed in the United States Patent and Trademark Office (USPTO), that establishes an early filing date, but does not mature into an issued patent unless the applicant files a regular non-provisional patent application within one year.

This paragraph demonstrates that you have to file the patent within one year of the 'early filing date' and means that TV2 can file the patent at any time in this period.