US Plant Patent PP19893
Prairie Twilight
Penstemon plant named ‘Prairie Twilight’
UNDER PATENT
Still under patent. Protection ends December 21, 2027.
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
- PP19893
- Filed
- December 21, 2007
- Granted
- April 7, 2009
- Expires
- December 21, 2027
- Assignee
- UNIV NEBRASKA
- Inventor
- LINDGREN DALE T; SCHAAF DANIEL M
Abstract
A new and distinct hybrid of Penstemon plant characterized by bicolored flowers with purple tubes and with white lower lips. The plant has a distinct fall foliage where the leaves turn a bronze red, medium height and good resistance to disease and insects.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct hybrid of Penstemon plant substantially as described and illustrated herein.
Read the full patent: US Plant Patent PP19893 in full — the complete specification, every figure, and the file history.