US Plant Patent PP18275
Yorock
Chrysanthemum plant named ‘Yorock’
PUBLIC DOMAIN
Patent expired July 19, 2026. This plant is in the public domain — anyone may propagate and sell it.
No term adjustment or disclaimer is recorded against this patent, so this is the full statutory term — twenty years from the filing date.

The record
- Patent number
- PP18275
- Filed
- July 19, 2006
- Granted
- December 4, 2007
- Expires
- July 19, 2026
- Assignee
- YODER BROTHERS INC
- Inventor
- VANDENBERG CORNELIS P
Abstract
A new and distinct cultivar of Chrysanthemum plant named ‘Yorock’, characterized by its upright plant habit; dark green-colored foliage; freely and uniformly flowering habit; decorative-type inflorescences that are about 7 cm in diameter; attractive greyed purple-colored ray florets; strong peduncles; and good postproduction longevity.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct Chrysanthemum plant named ‘Yorock’ as illustrated and described.
Read the full patent: US Plant Patent PP18275 in full — the complete specification, every figure, and the file history.