Genus
Paulownia
4 US plant patents have been granted in this genus. 0 are already in the public domain — anyone may propagate and sell them. The next of the 4 still protected comes off patent on January 18, 2028.
Still under patent — 4 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Anagenesis TrifoliaPP20499Paulownia tree named ‘Anagenesis Trifolia’UNDER PATENTJanuary 18, 2028
- NRJNJF13PP26652Paulownia tree named ‘NRJNJF13’UNDER PATENTDecember 9, 2033
- WEGROW-B7PP33040Paulownia tree named ‘WEGROW-B7’UNDER PATENTJune 22, 2040
- WEGROW-B6PP34088Paulownia tree named ‘WEGROW-B6’UNDER PATENTMay 3, 2041
A patent expiring frees the plant, and its cultivar name comes with it — cultivar names cannot be trademarked, so they are always free to use. What it does not free is any brand name the plant is marketed under. Those are trademarks and renew indefinitely.