US Plant Patent PP25494
Double Whammy
Helianthus plant named ‘Double Whammy’
UNDER PATENT
Still under patent. Protection ends November 20, 2033.
Twenty years from the filing date would end on August 27, 2033. This patent earned 85 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP25494
- Filed
- August 27, 2013
- Granted
- April 28, 2015
- Expires
- November 20, 2033
- Assignee
- RICHARDS RODNEY
- Inventor
- RICHARDS RODNEY
Abstract
A new cultivar of Helianthus , ‘Double Whammy’, that is characterized by its upright and compact plant habit, its large inflorescences that are golden yellow in color, and its double inflorescences with a row of ray florets on the outer edge and disc florets with expanded petals (ray floret-like) that are uniformly formed throughout bloom.
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 Helianthus plant named ‘Double Whammy’ substantially as herein illustrated and described.
Read the full patent: US Plant Patent PP25494 in full — the complete specification, every figure, and the file history.