Genus
Corylus
19 US plant patents have been granted in this genus. 1 is already in the public domain — anyone may propagate and sell it. The next of the 18 still protected comes off patent on April 16, 2028.
Still under patent — 18 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Red DragonPP20694Corylus plant named ‘Red Dragon’UNDER PATENTApril 16, 2028
- Anny's Purple DreamPP20413Corylus plant named ‘Anny's Purple Dream’UNDER PATENTSeptember 3, 2028
- Tonda PacificaPP22715Corylus plant named ‘Tonda Pacifica’UNDER PATENTDecember 16, 2030
- YorkPP24972Corylus plant named ‘York’UNDER PATENTFebruary 12, 2033
- DorrisPP25022Corylus plant named ‘Dorris’UNDER PATENTFebruary 12, 2033
- FelixPP24973Corylus plant named ‘Felix’UNDER PATENTFebruary 27, 2033
- WepsterPP27141Corylus plant named ‘Wepster’UNDER PATENTOctober 17, 2034
- McDonaldPP28200Corylus plant named ‘McDonald’UNDER PATENTJanuary 24, 2036
- Burgundy LacePP28216Corylus plant named ‘Burgundy Lace’UNDER PATENTFebruary 2, 2036
- PollyOPP32459Corylus plant named ‘PollyO’UNDER PATENTOctober 27, 2038
- RaritanPP32460Corylus plant named ‘Raritan’UNDER PATENTAugust 12, 2039
- HunterdonPP32461Corylus plant named ‘Hunterdon’UNDER PATENTAugust 12, 2039
- MonmouthPP32462Corylus plant named ‘Monmouth’UNDER PATENTAugust 12, 2039
- SomersetPP32494Corylus plant named ‘Somerset’UNDER PATENTAugust 12, 2039
- OSU 541.147PP33561Corylus plant named ‘OSU 541.147’UNDER PATENTAugust 28, 2040
- BWM01PP36422Corylus plant named ‘BWM01’UNDER PATENTDecember 20, 2042
- ThompsonPP37267Corylus plant named ‘Thompson’UNDER PATENTApril 5, 2044
- StapN7-6PP37182Corylus plant named ‘StapN7-6’UNDER PATENTDecember 18, 2044
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.
- Red MajesticPP16048Corylus plant named ‘Red Majestic’PUBLIC DOMAINSeptember 21, 2024
A patent expiring frees the plant, and its cultivar name comes with it — cultivar names cannot be trademarked, so they are always free to use. What it does not free is any brand name the plant is marketed under. Those are trademarks and renew indefinitely.