US Plant Patent PP27838
Mars Madness
Hibiscus plant named ‘Mars Madness’
UNDER PATENT
Still under patent. Protection ends October 29, 2035.
Twenty years from the filing date would end on August 19, 2035. This patent earned 71 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP27838
- Filed
- August 19, 2015
- Granted
- April 4, 2017
- Expires
- October 29, 2035
- Assignee
- WALTERS GARDENS INC, HANSEN HANS A
- Inventor
- HANSEN HANS A
Abstract
A new and distinct cultivar of hardy herbaceous perennial Hibiscus hybrid plant named ‘Mars Madness’ comprising an upright dense branching, numerous flowers over a long season having vibrant magenta-red overlapping petals and a darker red lustrous eye halo. The foliage is dark-green with greyed-purple overlay, primarily heavily-dissected and tri-lobed.
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 ‘Mars Madness’ as herein illustrated and described.
Read the full patent: US Plant Patent PP27838 in full — the complete specification, every figure, and the file history.