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The Patent Garden

US Plant Patent PP18439

HB 329

Hybrid variety of (Texas Bluegrass×Kentucky Bluegrass)×Kentucky Bluegrass designated ‘HB 329’

PUBLIC DOMAIN

Patent expired January 17, 2026. This plant is in the public domain — anyone may propagate and sell it.

Twenty years from the filing date would end on August 19, 2025. This patent earned 151 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP18439, the photograph of HB 329 printed in the patent.
Figure 1 from US Plant Patent PP18439, 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
PP18439
Filed
August 19, 2005
Granted
January 15, 2008
Expires
January 17, 2026
Inventor
HARDISON JOHN R; BURR JAY B; FRELICH JAMES R; MARQUEZ GEORGE

Abstract

A hybrid variety of (Texas bluegrass×Kentucky bluegrass)×Kentucky bluegrass as described, characterized by a moderately rapid establishment; a light green, dense turf; a wide leaf blade; aggressive rhizome growth; a reduced level of cotton on the seed; and a low to medium-low seed yield potential.

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

1. A new and distinct hybrid variety of (Texas bluegrass×Kentucky bluegrass)×Kentucky bluegrass plant, as herein illustrated and described and characterized by a moderately rapid establishment; a dark green, moderately dense turf; a wide leaf blade; moderately aggressive rhizome growth; a moderate level of cotton on the seed; and a low to medium-low seed yield potential.

Read the full patent: US Plant Patent PP18439 in full — the complete specification, every figure, and the file history.