Plant
Elm
11 US plant patents name this plant. 9 have expired, so those cultivars are free to propagate and sell. The next of the 2 still protected comes off patent on March 8, 2032.
Still under patent — 2 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
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.
- Prince RichardPP10732Elm named `Prince Richard`PUBLIC DOMAINDecember 19, 2016
- WideleafPP8730Elm tree variety named WideleafPUBLIC DOMAINMarch 22, 2013
- New HorizonPP8684Elm tree named New HorizonPUBLIC DOMAINJune 18, 2012
- CathedralPP8683Elm tree named "Cathedral"PUBLIC DOMAINMarch 26, 2012
- Golden Rey ElmPP7240Elm tree named Golden Rey ElmPUBLIC DOMAINMarch 3, 2009
- IndependencePP6227Elm tree named IndependencePUBLIC DOMAINOctober 15, 2005
- Elm treePP5554PUBLIC DOMAINJuly 27, 2004
- RegalPP5335Elm tree called RegalPUBLIC DOMAINMarch 7, 2003
- UlmusPP5015Elm treePUBLIC DOMAINApril 29, 2001
Botanically this is Ulmus. 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.