US Plant Patent PP22548
DUP-BLKD
Hibiscus plant named ‘DUP-BLKD’
UNDER PATENT
Still under patent. Protection ends April 6, 2030.
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
- PP22548
- Filed
- April 6, 2010
- Granted
- March 6, 2012
- Expires
- April 6, 2030
- Assignee
- DUPONT SR ROBERT J
- Inventor
- DUPONT SR ROBERT J
Abstract
A new and distinct cultivar of hibiscus plant named ‘DUP-BLKD’, characterized by glossy, dark green leaves, upright habit appropriate for container production and culture, freely flowering habit, and a glossy, blackish red center shades into a brown-scarlet by midpetal, shading to brown orange at the petal margin.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
It is claimed: 1. A new and distinct hibiscus plant named ‘DUP-BLKD’, as illustrated and described.
Read the full patent: US Plant Patent PP22548 in full — the complete specification, every figure, and the file history.