Plant
Shiitake mushroom
7 US plant patents name this plant. 2 have expired, so those cultivars are free to propagate and sell. The next of the 5 still protected comes off patent on November 19, 2036.
Still under patent — 5 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- HOKSY 8PP29740Shiitake mushroom plant named ‘HOKSY 8’UNDER PATENTNovember 19, 2036
- FFT-52PP29815Shiitake mushroom plant named ‘FFT-52’UNDER PATENTJune 22, 2037
- HOKSY 10gokinPP32842Shiitake mushroom named ‘HOKSY 10gokin’UNDER PATENTFebruary 7, 2039
- Chikumasshu CS-2PP33887Shiitake mushroom named ‘Chikumasshu CS-2’UNDER PATENTSeptember 17, 2040
- HS911PP35498Shiitake mushroom named ‘HS911’UNDER PATENTFebruary 22, 2043
Already in the public domain — 2 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.
- HS607PP12928Shiitake mushroom plant named ‘HS607’PUBLIC DOMAINOctober 23, 2020
- Hokken 601PP7339Shiitake mushroom plant named `Hokken 601`PUBLIC DOMAINJuly 18, 2008
Botanically this is Lentinula. 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.