Genus
Dendranthema
11 US plant patents have been granted in this genus. 0 are already in the public domain — anyone may propagate and sell them. The next of the 11 still protected comes off patent on April 15, 2034.
On the name: Filed as Dendranthema. Now generally treated as a synonym of Chrysanthemum.
Still under patent — 11 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Fireworks IglooPP26666Dendranthema plant named ‘Fireworks Igloo’UNDER PATENTApril 15, 2034
- Icicle IglooPP26667Dendranthema plant named ‘Icicle Igloo’UNDER PATENTApril 15, 2034
- Sizzling IglooPP26668Dendranthema plant named ‘Sizzling Igloo’UNDER PATENTApril 15, 2034
- Radiant IglooPP27040Dendranthema plant named ‘Radiant Igloo’UNDER PATENTJanuary 9, 2035
- Snowy IglooPP26998Dendranthema plant named ‘Snowy Igloo’UNDER PATENTJanuary 10, 2035
- Pumpkin IglooPP27001Dendranthema plant named ‘Pumpkin Igloo’UNDER PATENTJanuary 10, 2035
- Harvest IglooPP29152Dendranthema plant named ‘Harvest Igloo’UNDER PATENTNovember 30, 2036
- Dainty Pink IglooPP29174Dendranthema plant named ‘Dainty Pink Igloo’UNDER PATENTNovember 30, 2036
- Sundance IglooPP30049Dendranthema plant named ‘Sundance Igloo’UNDER PATENTJanuary 3, 2037
- Firedance IglooPP29835Dendranthema plant named ‘Firedance Igloo’UNDER PATENTNovember 8, 2037
- Ice Pink IglooPP29862Dendranthema plant named ‘Ice Pink Igloo’UNDER PATENTNovember 8, 2037
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.