Plant
Ash
9 US plant patents name this plant. 9 have expired, so those cultivars are free to propagate and sell.
Already in the public domain — 9 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.
- HeuverPP13262Hardy green ash tree named ‘Heuver’PUBLIC DOMAINMay 26, 2020
- Northern GemPP11777Hybrid ash tree named ‘Northern Gem’PUBLIC DOMAINJanuary 20, 2019
- Northern TreasurePP11840Hybrid ash tree named ‘Northern Treasure’PUBLIC DOMAINJanuary 20, 2019
- CimmzamPP8077Green ash tree named CimmzamPUBLIC DOMAINJanuary 10, 2011
- WaskyPP7036Green ash named `Wasky`PUBLIC DOMAINMarch 7, 2008
- UrbanitePP6215Green ash named UrbanitePUBLIC DOMAINJanuary 17, 2006
- Bergeson NurseryPP4904Green ash treePUBLIC DOMAINJune 20, 2000
- White ashPP4756PUBLIC DOMAINApril 14, 2000
- Green AshPP4684Green Ash treePUBLIC DOMAINApril 27, 1999
Botanically this is Fraxinus. 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.