US Plant Patent PP29554
Donahros
Clematis plant named ‘Donahros’
UNDER PATENT
Still under patent. Protection ends July 26, 2036.
Twenty years from the filing date would end on May 24, 2036. This patent earned 63 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP29554
- Filed
- May 24, 2016
- Granted
- July 31, 2018
- Expires
- July 26, 2036
- Assignee
- DONAHUE MARK R, DONAHUES GREEN HOUSES INC
- Inventor
- DONAHUE MARK R
Abstract
A new cultivar of hybrid Clematis , ‘Donahros’, that is characterized by its flowers with six petals that emerge dark pink in color and fade to many shades of pink, its anthers that are burgundy in color, its dark green foliage, and its floriferous repeat bloom period beginning in June and then again in late August.
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 cultivar of Clematis plant named ‘Donahros’ as herein illustrated and described.
Read the full patent: US Plant Patent PP29554 in full — the complete specification, every figure, and the file history.