Plant
Corydalis
5 US plant patents name this plant. 1 has expired, so that cultivar is free to propagate and sell. The next of the 4 still protected comes off patent on February 3, 2027.
Still under patent — 4 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Canary FeathersPP18909Corydalis plant named ‘Canary Feathers ’UNDER PATENTFebruary 3, 2027
- Berry ExcitingPP18917Corydalis plant named ‘Berry Exciting’UNDER PATENTMarch 18, 2027
- COURIBLUEPP25277Corydalis plant named ‘COURIBLUE’UNDER PATENTJuly 9, 2033
- Porcelain BluePP31637Corydalis plant named ‘Porcelain Blue’UNDER PATENTJanuary 23, 2039
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.
- Golden PandaPP13254Corydalis flexuosa plant named ‘Golden Panda’PUBLIC DOMAINMay 3, 2021
Botanically this is Corydalis. 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.