Genus
Calycanthus
5 US plant patents have been granted in this genus. 1 is already in the public domain — anyone may propagate and sell it. The next of the 4 still protected comes off patent on February 3, 2032.
Still under patent — 4 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- AphroditePP24014Calycanthus plant named ‘Aphrodite’UNDER PATENTFebruary 3, 2032
- Burgundy SpicePP28886Calycanthus plant named ‘Burgundy Spice’UNDER PATENTDecember 15, 2036
- SMNCAFPP33550Calycanthus plant named ‘SMNCAF’UNDER PATENTSeptember 30, 2040
- PRNCFSPP37242Calycanthus plant named ‘PRNCFS’UNDER PATENTDecember 2, 2044
Already in the public domain — 1 cultivar
Most recently freed first. Anyone may propagate and sell this plant — though the name it is sold under may still be a live trademark.
- VenusPP15925Hybrid Calycanthus plant named ‘Venus’PUBLIC DOMAINNovember 24, 2023
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.