US Plant Patent PP36594
Treasure Trove
Rudbeckia plant named ‘Treasure Trove’
UNDER PATENT
Still under patent. Protection ends November 22, 2044.
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
- PP36594
- Filed
- November 22, 2024
- Granted
- April 8, 2025
- Expires
- November 22, 2044
- Assignee
- WALTERS GARDENS INC, HANSEN HANS A
- Inventor
- HANSEN HANS A
Abstract
The new and distinct hardy perennial plant, Rudbeckia ‘Treasure Trove’, has dense, rounded, mound habit with extensively-branched, predominately strong upright stems. Freely flowering habit beginning in early summer and continuing for about 6 to 7 weeks and repeating if deadheaded. Clean foliage shows significant resistance to Angular Leaf Spot and Septoria fungal leaf spot diseases. Inflorescences are in a capitulum with a single row of golden-yellow ray florets and central disk florets of greyed-purplish coloration. The new plant has a strong garden performance and is useful in the landscape en masse, as an accent, in containers or as cut flowers.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. A new and distinct hardy perennial Rudbeckia plant named ‘Treasure Trove’ essentially as herein described and illustrated.
Read the full patent: US Plant Patent PP36594 in full — the complete specification, every figure, and the file history.