US Plant Patent PP17728

Princess

Pennisetum purpureum plant named ‘Princess’

PUBLIC DOMAIN

Patent expired July 14, 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 31 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP17728, the photograph of Princess printed in the patent. — Figure 1 from US Plant Patent PP17728, 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: PP17728
Filed: June 13, 2005
Granted: May 15, 2007
Expires: July 14, 2025
Assignee: UNIV GEORGIA RES FOUND
Inventor: HANNA WAYNE W; RUTER JOHN M

Abstract

Pennisetum purpureum ‘Princess’ is a 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 PP17728 in full — the complete specification, every figure, and the file history.