US Plant Patent PP27535
Moulin Rouge
Hibiscus plant named ‘Moulin Rouge’
UNDER PATENT
Still under patent. Protection ends December 1, 2034.
Twenty years from the filing date would end on July 23, 2034. This patent earned 131 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP27535
- Filed
- July 23, 2014
- Granted
- January 10, 2017
- Expires
- December 1, 2034
- Assignee
- ZWETZIG GRETCHEN ANGELA
- Inventor
- ZWETZIG GRETCHEN ANGELA
Abstract
A new and distinct cultivar of winter hardy Hibiscus plant named ‘Moulin Rouge’ is the result of a unique hybridization. This new and distinct cultivar is characterized primarily as to its novelty by its extreme cold hardiness to Zone 4, its large thick-textured, ruffled dark red flowers and its ovate to “Maple-shaped” foliage with its deep bronze coloration, compactness of approximately 2½ feet, its vigorous and uniform breaking habit and its floriferous nature from Summer until Frost.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
The invention claimed is: 1. A new and distinct cultivar of hardy Hibiscus plant, as herein shown and described, characterized by its compact nature, refined ovate to “maple-shaped” foliage of a deep bronze-purple coloration, its large dark red flowers, its vigor and its hardiness.
Read the full patent: US Plant Patent PP27535 in full — the complete specification, every figure, and the file history.