Plant
Poplar
4 US plant patents name this plant. 3 have expired, so those cultivars are free to propagate and sell. The next of the 1 still protected comes off patent on March 19, 2039.
Still under patent — 1 cultivar
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Gold PoplarPP32272Poplar tree named ‘Gold Poplar’UNDER PATENTMarch 19, 2039
Already in the public domain — 3 cultivars
Most recently freed first. Anyone may propagate and sell these plants — though the name it is sold under may still be a live trademark.
- Curly PoplarPP17525Poplar tree named ‘Curly Poplar’PUBLIC DOMAINApril 22, 2025
- Gnarly PoplarPP15613Poplar tree named ‘Gnarly Poplar’PUBLIC DOMAINDecember 30, 2023
- ShinseiPP14664Poplar named ‘Shinsei’PUBLIC DOMAINJune 24, 2022
Botanically this is Populus. A patent expiring frees the plant, and its cultivar name with it — cultivar names cannot be trademarked. Any brand name it is sold under is a separate thing and may still be owned.