Plant
Tricyrtis
7 US plant patents name this plant. 4 have expired, so those cultivars are free to propagate and sell. The next of the 3 still protected comes off patent on December 14, 2026.
Still under patent — 3 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Imperial BannerPP18956Tricyrtis plant named ‘Imperial Banner’UNDER PATENTDecember 14, 2026
- White WavesPP20007Tricyrtis plant named ‘White Waves’UNDER PATENTJune 3, 2028
- KristenPP33439Tricyrtis plant named ‘Kristen’UNDER PATENTFebruary 23, 2041
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.
- Taipei SilkPP18727Tricyrtis plant named ‘Taipei Silk’PUBLIC DOMAINSeptember 3, 2026
- Raspberry MoussePP16257Tricyrtis plant named ‘Raspberry Mousse’PUBLIC DOMAINJanuary 7, 2025
- Moonlight TreasurePP16037Tricyrtis plant named ‘Moonlight Treasure’PUBLIC DOMAINJuly 20, 2024
- Gilty PleasurePP13688Tricyrtis plant named ‘Gilty Pleasure’PUBLIC DOMAINSeptember 27, 2021
Botanically this is Tricyrtis. 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.