US Plant Patent PP23349
Stainless Steel
Heuchera plant named ‘Stainless Steel’
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
- PP23349
- Filed
- July 25, 2011
- Granted
- January 22, 2013
- Expires
- August 28, 2031
- Assignee
- PLANTS NOUVEAU LLC, OLIVER CHARLES
- Inventor
- OLIVER CHARLES
Abstract
A new cultivar of Heuchera , ‘Stainless Steel’, is characterized by its foliage that emerges silver in color and heavily suffused with red-purple and matures to silver with green veins, lower leaf surface is dark red-purple, its flowers that are comparatively large, well shaped, and white in color, its well-proportioned plant form, its evergreen 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 ‘Stainless Steel’ as herein illustrated and described.
Read the full patent: US Plant Patent PP23349 in full — the complete specification, every figure, and the file history.