US Plant Patent PP18509

Prince

Pennisetum purpureum plant named ‘Prince’

PUBLIC DOMAIN

Patent expired October 8, 2025. This plant is in the public domain — anyone may propagate and sell it.

Twenty years from the filing date would end on June 13, 2025. This patent earned 117 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP18509, the photograph of Prince printed in the patent. — Figure 1 from US Plant Patent PP18509, 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: PP18509
Filed: June 13, 2005
Granted: February 26, 2008
Expires: October 8, 2025
Assignee: UNIV GEORGIA RES FOUND
Inventor: HANNA WAYNE W; RUTER JOHN M

Abstract

Pennisetum purpureum ‘Prince’ is a semi-dwarf, purple-foliaged napiergrass. It is a perennial in USDA hardiness zones 8-10, and a vigorous annual in more northern zones.

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 Pennisetum purpureum plant, substantially as herein described and illustrated.

Read the full patent: US Plant Patent PP18509 in full — the complete specification, every figure, and the file history.