US Plant Patent PP33498
Blackberry Merlot
Hibiscus plant named ‘Blackberry Merlot’
UNDER PATENT
Still under patent. Protection ends April 16, 2041.
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
- PP33498
- Filed
- April 16, 2021
- Granted
- September 21, 2021
- Expires
- April 16, 2041
- Assignee
- WALTERS GARDENS INC, HANSEN HANS A
- Inventor
- HANSEN HANS A
Abstract
A new and distinct cultivar of winter-hardy, herbaceous, perennial, hybrid Hibiscus plant named ‘Blackberry Merlot’ comprising a compact, upright, mounded habit of multiple, well-branched, basal stems producing flowers beginning in late July for at least eight weeks. Flowers have overlapping, moderately-rippled petals of deep velvety red with dark reddish shiny eye, with the leading margin occasionally folded underneath giving flowers extra strength and resistance to wind damage. The flower buds are dark, purplish gray. The foliage is primarily three-lobed, and rich olive-green with mahogany coloration when young.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. A new cultivar of hardy herbaceous perennial Hibiscus hybrid plant named ‘Blackberry Merlot’ as herein illustrated and described.
Read the full patent: US Plant Patent PP33498 in full — the complete specification, every figure, and the file history.