US Plant Patent PP16435
Time Tunnel
Hosta plant named ‘Time Tunnel’
PUBLIC DOMAIN
Patent expired April 3, 2025. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on December 8, 2024. This patent earned 116 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP16435
- Filed
- December 8, 2004
- Granted
- April 11, 2006
- Expires
- April 3, 2025
- Assignee
- SUNNY BORDER NURSERIES INC
- Inventor
- LAVIANA MARC R
Abstract
A new cultivar of Hosta sieboldiana , ‘Time Tunnel’, characterized by its variegated foliage of green centers and wide margins that emerge chartreuse, change to a bright gold, and mature to a creamy gold color. The margins of the foliage of ‘Time Tunnel’ are much wider than its parent plant, ‘Frances Williams’, comprising about 50% of the leaf area.
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 Hosta plant named ‘Time Tunnel’ as herein illustrated and described.
Read the full patent: US Plant Patent PP16435 in full — the complete specification, every figure, and the file history.