US Plant Patent PP18339

Knockout

Dahlia plant named ‘Knockout’

PUBLIC DOMAIN

Patent expired August 23, 2026. This plant is in the public domain — anyone may propagate and sell it.

Twenty years from the filing date would end on August 8, 2026. This patent earned 15 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP18339, the photograph of Knockout printed in the patent. — Figure 1 from US Plant Patent PP18339, 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: PP18339
Filed: August 8, 2006
Granted: December 18, 2007
Expires: August 23, 2026
Assignee: HAMMETT KEITH
Inventor: HAMMETT KEITH

Abstract

A new cultivar of Dahlia named ‘KNOCKOUT’ that is distinguishable by upright habit, mahogany-black divided leaves, and yellow star-shaped blossoms. In combination these traits set ‘KNOCKOUT’ apart from all other existing varieties of Dahlia known to the inventor.

Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.

1. A new and distinct cultivar of Dahlia plant named ‘KNOCKOUT’ as described and illustrated herein.

Read the full patent: US Plant Patent PP18339 in full — the complete specification, every figure, and the file history.