US Plant Patent PP15958
Nr. 20
Nephrolepis plant named ‘Nr. 20’
PUBLIC DOMAIN
Patent expired June 14, 2024. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on May 3, 2024. This patent earned 42 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP15958
- Filed
- May 3, 2004
- Granted
- September 13, 2005
- Expires
- June 14, 2024
- Assignee
- BRAAM YOUNG PLANTS B V
- Inventor
- VAN ANDEL OTTO JAN ROBERT
Abstract
A new and distinct cultivar of Nephrolepis plant named ‘Nr. 20’, characterized by its mostly upright and somewhat outwardly arching plant habit; strong, erect and visible rachis; and uniquely-shaped undulate pinnae.
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 Nephrolepis plant named ‘Nr. 20’, as illustrated and described.
Read the full patent: US Plant Patent PP15958 in full — the complete specification, every figure, and the file history.