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.

The record
- Patent number
- PP18439
- Filed
- August 19, 2005
- Granted
- January 15, 2008
- Expires
- January 17, 2026
- Assignee
- OMS INVESTMENTS INC
- 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.