US Plant Patent PP37393
Blue Steel
Andropogon grass named ‘Blue Steel’
UNDER PATENT
Still under patent. Protection ends October 14, 2045.
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
- PP37393
- Filed
- October 14, 2025
- Granted
- April 28, 2026
- Expires
- October 14, 2045
- Assignee
- WALTERS GARDENS INC
- Inventor
- Hans A. Hansen
Abstract
A new and distinct ornamental Big Bluestem Grass Andropogon plant named ‘Blue Steel’ with broad, distally-arching, bluish-green foliage that develops reddish-purple leaf ends about late summer. The upright and dense culms that resist lodging produce medium-height plants with panicles beginning purplish-grey and becoming tan seed heads that are retained into winter. The new plant is useful in the landscape as a specimen or en masse.
Read the full patent: US Plant Patent PP37393 in full — the complete specification, every figure, and the file history.