US Plant Patent PP18036
Silvanus 1
Thuja plant named ‘Silvanus 1’
PUBLIC DOMAIN
Patent expired December 7, 2025. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on September 20, 2025. This patent earned 78 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP18036
- Filed
- September 20, 2005
- Granted
- September 18, 2007
- Expires
- December 7, 2025
- Assignee
- NEMETH JENOE
- Inventor
- NEMETH JENOE
Abstract
‘Silvanus 1’ is a new variety of Thuja occidentalis that exhibits medium dense branching and is suitable for use as a solitary garden plant or for use as a field hedge.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct variety of Thuja occidentalis plant named ‘Silvanus 1’ as is herein described and illustrated.
Read the full patent: US Plant Patent PP18036 in full — the complete specification, every figure, and the file history.