US Plant Patent PP13218
M8/20
Argyranthemum plant named ‘M8/20’
PUBLIC DOMAIN
Patent expired June 8, 2021. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on June 4, 2021. This patent earned 4 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP13218
- Filed
- June 4, 2001
- Granted
- November 12, 2002
- Expires
- June 8, 2021
- Inventor
- HAMMOND FRANCIS WILLIAM
Abstract
A distinct cultivar of Argyranthemum plant named ‘M8/20’, characterized by its compact and mounded plant habit; freely branching habit, dense and bushy plants; very freely flowering with numerous inflorescences per plant; purple red-colored ray florets that fade to pale pink with age; and unique semi-double inflorescence form.
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 Argyranthemum plant named ‘M8/20’, as illustrated and described.
Read the full patent: US Plant Patent PP13218 in full — the complete specification, every figure, and the file history.