US Plant Patent PP31478
Holy Grail
Hibiscus plant named ‘Holy Grail’
UNDER PATENT
Still under patent. Protection ends November 5, 2038.
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
- PP31478
- Filed
- November 5, 2018
- Granted
- February 25, 2020
- Expires
- November 5, 2038
- 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 ‘Holy Grail’ comprising a rounded mound habit of multiple, well-branched, basal stems producing flowers from the bottom to the top of the plant from late July to early September. Flowers have petals with strong red with dark red shiny eye set off with column of light yellow pollen. The foliage is ovate to rarely three-lobed, and deep mahogany-colored and the light green calyces provide sharp contrast.
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 ‘Holy Grail’ as herein illustrated and described.
Read the full patent: US Plant Patent PP31478 in full — the complete specification, every figure, and the file history.