US Plant Patent PP33779
COSEH 6500
Helleborus plant named ‘COSEH 6500’
UNDER PATENT
Still under patent. Protection ends December 4, 2040.
Twenty years from the filing date would end on May 27, 2040. This patent earned 191 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP33779
- Filed
- May 27, 2020
- Granted
- December 21, 2021
- Expires
- December 4, 2040
- Assignee
- HEUGER JOSEF
- Inventor
- HEUGER JOSEF
Abstract
A new and distinct cultivar of Helleborus plant named ‘COSEH 6500’, characterized by its upright to slightly outwardly spreading and mounded plant habit; moderately vigorous to vigorous growth habit; dark green-colored leaves; freely flowering habit; light yellow green-colored flowers with greyed purple to greyed red-colored margins and venation; 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 ‘COSEH 6500’ as illustrated and described.
Read the full patent: US Plant Patent PP33779 in full — the complete specification, every figure, and the file history.