Genus
Sorghastrum
2 US plant patents have been granted in this genus. 0 are already in the public domain — anyone may propagate and sell them. The next of the 2 still protected comes off patent on July 21, 2036.
Still under patent — 2 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Thin ManPP28923Yellow Indiangrass plant named ‘Thin Man’UNDER PATENTJuly 21, 2036
- MNYG318153PP33776Sorghastrum plant named ‘MNYG318153’UNDER PATENTNovember 16, 2040
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.