US Plant Patent PP19922
QPSTJ
Willow oak tree named ‘QPSTJ’
UNDER PATENT
Still under patent. Protection ends December 13, 2026.
No term adjustment or disclaimer is recorded against this patent, so this is the full statutory term — twenty years from the filing date.

The record
- Patent number
- PP19922
- Filed
- December 13, 2006
- Granted
- April 14, 2009
- Expires
- December 13, 2026
- Assignee
- TREE INTRODUCTIONS INC
- Inventor
- GLENN MICHAEL M
Abstract
A Willow Oak tree named ‘QPSTJ’ having an upswept branching habit, dense canopy, dominant central leader, unique red fall color, and relatively fast growth rate, and also capable of being reproduced reliably using softwood cutting methods.
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 Willow Oak tree named ‘QPSTJ,’ substantially as herein illustrated and described, characterized particularly as to novelty by its upswept branching habit, dense canopy, dominant central leader, unique red fall color, and relatively fast growth rate.
Read the full patent: US Plant Patent PP19922 in full — the complete specification, every figure, and the file history.