US Plant Patent PP22547
DUP-NPK
Hibiscus plant named ‘DUP-NPK’
UNDER PATENT
Still under patent. Protection ends April 21, 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
- PP22547
- Filed
- April 21, 2010
- Granted
- March 6, 2012
- Expires
- April 21, 2030
- Assignee
- DUPONT SR ROBERT J
- Inventor
- DUPONT SR ROBERT J
Abstract
A new and distinct cultivar of hibiscus plant named ‘DUP-NPK’, characterized by glossy, dark green leaves, upright, tall, growth habit, which can be floppy if not staked, appropriate for container production and culture freely flowering habit, and double flower characterized by a small dark red eye zone radiating into a glossy bright pink zone which radiates to 30 percent of the petal length into a medium pink zone which may darken to rich pink at the petal's ruffled sections.
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-NPK’, as illustrated and described.
Read the full patent: US Plant Patent PP22547 in full — the complete specification, every figure, and the file history.