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US Plant Patent PP36558

HP221904

Hydrangea plant named ‘HP221904’

UNDER PATENT

Still under patent. Protection ends December 6, 2043.

Twenty years from the filing date would end on May 31, 2043. This patent earned 189 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP36558, the photograph of HP221904 printed in the patent.
Figure 1 from US Plant Patent PP36558, reproduced as printed. Photographs in a plant patent are taken by the applicant. Reproduction of the patent document is permitted; the image is shown whole and uncropped for that reason.

The record

Patent number
PP36558
Filed
May 31, 2023
Granted
March 18, 2025
Expires
December 6, 2043
Assignee
HYDRANGEA BREEDERS ASS B V
Inventor
ARTS NIELS

Abstract

A new and distinct cultivar of Hydrangea plant named ‘HP221904’, characterized by its relatively compact, upright to somewhat outwardly spreading and rounded to conical plant habit; vigorous growth habit and rapid growth rate; freely branching habit with strong, thick and sturdy stems; freely and uniformly flowering habit; large rounded conical inflorescences with numerous light yellow green-colored sterile flowers that become purplish red in the autumn; 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 Hydrangea plant named ‘HP221904’ as herein illustrated and described.

Read the full patent: US Plant Patent PP36558 in full — the complete specification, every figure, and the file history.