Plant
Chestnut
9 US plant patents name this plant. 1 has expired, so that cultivar is free to propagate and sell. The next of the 8 still protected comes off patent on January 30, 2028.
Still under patent — 8 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- AU EncorePP20336Chestnut plant named ‘AU Encore’UNDER PATENTJanuary 30, 2028
- AU Buck IIPP20337Chestnut plant named ‘AU Buck II’UNDER PATENTJanuary 30, 2028
- AU Gobbler IPP20338Chestnut plant named ‘AU Gobbler I’UNDER PATENTJanuary 30, 2028
- AU Buck IIIPP20381Chestnut plant named ‘AU Buck III’UNDER PATENTJanuary 30, 2028
- Au Gobbler IIPP20553Chestnut plant named ‘Au Gobbler II’UNDER PATENTJanuary 30, 2028
- AU PremierPP20587Chestnut plant named ‘AU Premier’UNDER PATENTJanuary 30, 2028
- Au Buck IPP20588Chestnut plant named ‘Au Buck I’UNDER PATENTJanuary 30, 2028
- AU BUCK IVPP20624Chestnut plant named ‘AU BUCK IV’UNDER PATENTJanuary 30, 2028
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.
- RevivalPP5537Hybrid chestnut tree `Revival`PUBLIC DOMAINNovember 4, 2003
Botanically this is Castanea. 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.