US Plant Patent PP21513
HYDfour
Hydrangea plant named ‘HYDfour’
UNDER PATENT
Still under patent. Protection ends May 15, 2029.
Twenty years from the filing date would end on December 9, 2028. This patent earned 157 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP21513
- Filed
- December 9, 2008
- Granted
- November 23, 2010
- Expires
- May 15, 2029
- Assignee
- FOTINOS PETER
- Inventor
- FOTINOS PETER
Abstract
A new Hydrangea plant, which has abundant, pink colored double flowers and attractive foliage. The variety successfully propagates from softwood cuttings and is suitable for year round production in commercial glass houses as a flowering pot plant. This new and distinct variety has shown to be uniform and stable in the resulting generations from asexual propagation.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct variety of Hydrangea plant, substantially as herein illustrated and described as a distinct and novel Hydrangea variety due to its abundant pink double flowers, attractive long lasting foliage, vigorous and compact growth, year round flowering under glasshouse conditions, suitability for production from softwood cuttings in pots, and durable flowers and foliage which make the variety suitable for distribution in the floral industry.
Read the full patent: US Plant Patent PP21513 in full — the complete specification, every figure, and the file history.