Plant
Bunashimeji mushroom
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 January 29, 2028.
Still under patent — 4 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Hokuto-18PP21184Bunashimeji mushroom plant named ‘Hokuto-18’UNDER PATENTJanuary 29, 2028
- marmo shiro-2PP26049Bunashimeji mushroom plant named ‘marmo shiro-2’UNDER PATENTNovember 29, 2033
- Marmo22goPP31279Bunashimeji mushroom named ‘Marmo22go’UNDER PATENTMarch 30, 2038
- HKHM25PP35511Bunashimeji mushroom named ‘HKHM25’UNDER PATENTSeptember 7, 2042
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.
- Hokuto Shiro IchigoukinPP16294Bunashimeji mushroom plant named ‘Hokuto Shiro Ichigoukin’PUBLIC DOMAINAugust 24, 2023
Botanically this is Hypsizygus. 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.