Plant
Chinese elm
3 US plant patents name this plant. 3 have expired, so those cultivars are free to propagate and sell.
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.
- Emer IPP7551Chinese elm tree named `Emer I`PUBLIC DOMAINApril 10, 2009
- Emer IIPP7552Chinese elm tree named `Emer II`PUBLIC DOMAINApril 10, 2009
- ARoss/Central ParkPP6983Chinese elm cultivar named "ARoss/Central Park"PUBLIC DOMAINFebruary 1, 2008
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.