US Plant Patent PP21858
Midnight Bayou
Heuchera plant named ‘Midnight Bayou’
UNDER PATENT
Still under patent. Protection ends February 3, 2030.
Twenty years from the filing date would end on December 14, 2029. This patent earned 51 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP21858
- Filed
- December 14, 2009
- Granted
- April 5, 2011
- Expires
- February 3, 2030
- Assignee
- TERRA NOVA NURSERIES INC
- Inventor
- EGGER JANET N
Abstract
A new and distinct hybrid of Heuchera plant characterized by its very large purple spring leaves to rose-purple summer leaves with black veins and a silver veil. In addition it has a large mounding habit and excellent vigor.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct Heuchera plant as herein illustrated and described.
Read the full patent: US Plant Patent PP21858 in full — the complete specification, every figure, and the file history.