Plant
Corn
4 US plant patents name this plant. 4 have expired, so those cultivars are free to propagate and sell.
Already in the public domain — 4 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.
- Venus ExpressPP17444Corn plant named ‘Venus Express’PUBLIC DOMAINApril 18, 2025
- Sun StarPP9640Corn plant named `Sun Star`PUBLIC DOMAINMay 31, 2015
- TripsacornPP7977Corn plant named TripsacornPUBLIC DOMAINNovember 13, 2010
- Sun DancePP6906Corn plant named Sun DancePUBLIC DOMAINNovember 4, 2007
Botanically this is Zea. 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.