Genus
Exacum
5 US plant patents have been granted in this genus. 5 are already in the public domain — anyone may propagate and sell them.
Already in the public domain — 5 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.
- Blue RopendelPP7224Exacum plant named Blue RopendelPUBLIC DOMAINNovember 18, 2008
- Best RosePP6927Exacum plant `Best Rose`PUBLIC DOMAINJanuary 11, 2008
- White RosettePP6102Exacum named White RosettePUBLIC DOMAINFebruary 24, 2006
- Blue RosettePP6154Exacum named Blue RosettePUBLIC DOMAINFebruary 24, 2006
- ExacumPP5914Double Exacum whitePUBLIC DOMAINMarch 12, 2005
A patent expiring frees the plant, and its cultivar name comes with it — cultivar names cannot be trademarked, so they are always free to use. What it does not free is any brand name the plant is marketed under. Those are trademarks and renew indefinitely.