US Plant Patent PP16835
Stoplight
×Heucherella plant named ‘Stoplight’
PUBLIC DOMAIN
Patent expired April 4, 2025. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on January 27, 2025. This patent earned 67 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP16835
- Filed
- January 27, 2005
- Granted
- July 18, 2006
- Expires
- April 4, 2025
- Assignee
- TERRA NOVA NURSERIES INC
- Inventor
- EGGER JANET N
Abstract
A new and distinct cultivar of × Heucherella plant characterized by its distinctive gold to chartreuse foliage with a large, starry, maroon blotch.
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 × Heucherella plant as herein illustrated and described.
Read the full patent: US Plant Patent PP16835 in full — the complete specification, every figure, and the file history.