Plant

Plum tree (

3 US plant patents name this plant. 3 have expired, so those cultivars are free to propagate and sell.

Already in the public domain — 3 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.

JD-1PP5926Plum tree ("JD-1")PUBLIC DOMAINAugust 14, 2005
Mid RedPP5744Plum tree ("Mid Red")PUBLIC DOMAINNovember 16, 2004
Autumn GiantPP5624Plum tree ("Autumn Giant")PUBLIC DOMAINApril 19, 2004

Botanically this is Prunus. 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.