Plant
Walnut
17 US plant patents name this plant. 10 have expired, so those cultivars are free to propagate and sell. The next of the 7 still protected comes off patent on August 28, 2027.
Still under patent — 7 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- RX1PP20649Walnut rootstock ‘RX1’UNDER PATENTAugust 28, 2027
- VX211PP21179Walnut rootstock ‘VX211’UNDER PATENTJanuary 25, 2028
- IvanhoePP21718Walnut tree named ‘Ivanhoe’UNDER PATENTDecember 8, 2029
- SolanoPP25466Walnut tree named ‘Solano’UNDER PATENTMay 28, 2033
- DurhamPP28529Walnut tree named ‘Durham’UNDER PATENTMay 7, 2036
- wolfskillPP33383Walnut tree names 'wolfskill'UNDER PATENTNovember 12, 2040
- HickmanPP36382Walnut tree named ‘Hickman’UNDER PATENTJanuary 18, 2044
Already in the public domain — 10 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.
- GilletPP17135Walnut tree named ‘Gillet’PUBLIC DOMAINJanuary 12, 2025
- FordePP16495Walnut tree named ‘Forde’PUBLIC DOMAINOctober 24, 2024
- SextonPP16496Walnut tree named ‘Sexton’PUBLIC DOMAINOctober 8, 2024
- FredrickPP14236Walnut tree named ‘Fredrick’PUBLIC DOMAINNovember 6, 2022
- DomotoPP12898Walnut tree named ‘Domoto’PUBLIC DOMAINNovember 17, 2019
- VesterPP6973Walnut tree named VesterPUBLIC DOMAINSeptember 14, 2008
- ChandlerPP4388Walnut treePUBLIC DOMAINApril 21, 1998
- SunlandPP4389Walnut treePUBLIC DOMAINApril 21, 1998
- HowardPP4405Walnut treePUBLIC DOMAINApril 21, 1998
- Walnut treePP4132PUBLIC DOMAINOctober 25, 1994
Botanically this is Juglans. 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.