US Plant Patent PP24434
Winterbells
Helleborus plant named ‘Winterbells’
UNDER PATENT
Still under patent. Protection ends February 8, 2032.
Twenty years from the filing date would end on November 28, 2031. This patent earned 72 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP24434
- Filed
- November 28, 2011
- Granted
- May 6, 2014
- Expires
- February 8, 2032
- Inventor
- VAN DER SAR MARTINUS WILLEM
Abstract
A new and distinct cultivar of Helleborus plant named ‘Winterbells’, characterized by its upright and mounded plant habit; freely branching habit; early and freely flowering habit; long flowering period; single white and light green-colored flowers; and good garden performance.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
It is claimed: 1. A new and distinct Helleborus plant named ‘Winterbells’ as illustrated and described.
Read the full patent: US Plant Patent PP24434 in full — the complete specification, every figure, and the file history.