US Plant Patent PP23454
Dark Chocolate
Heuchera plant named ‘Dark Chocolate’
UNDER PATENT
Still under patent. Protection ends August 28, 2031.
Twenty years from the filing date would end on July 25, 2031. This patent earned 34 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP23454
- Filed
- July 25, 2011
- Granted
- March 5, 2013
- Expires
- August 28, 2031
- Assignee
- PLANTS NOUVEAU LLC, OLIVER CHARLES
- Inventor
- OLIVER CHARLES
Abstract
A new cultivar of Heuchera of hybrid origin, ‘Dark Chocolate’, that is characterized by its foliage that is dark purple-bronze that is overlaid with silvery green mottling with the coloration retained throughout the growing season, its flowers that are comparatively large, well shaped, and pink in color, its red-purple flower buds and red-purple stems that contrast well with its pink flowers, its well-proportioned plant form, its foliage that is weather resistant with good tolerance to wind and rain, and its good garden performance.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct cultivar of Heuchera plant named ‘Dark Chocolate’ as herein illustrated and described.
Read the full patent: US Plant Patent PP23454 in full — the complete specification, every figure, and the file history.