US Plant Patent PP36081
Harbinger
Grape plant named ‘Harbinger’
UNDER PATENT
Still under patent. Protection ends June 15, 2043.
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
- PP36081
- Filed
- June 15, 2023
- Granted
- August 27, 2024
- Expires
- June 15, 2043
- Assignee
- PUTNAM ALAN R
- Inventor
- PUTNAM ALAN R
Abstract
A novel cultivar of grape plant named ‘Harbinger’ was discovered as a seedling in 2017. It was asexually propagated by rooting cuttings (the progeny) which in turn, have been scientifically evaluated for seven years. The characteristic of ‘Harbinger’ is its physiology, which enables complete ripening 3-4 weeks ahead of other red cold-hardy wine grapes (its Market Class). ‘Harbinger’ plants are winter-hardy to at least −20F, and present a good sugar/acid balance enabling quality red wine. Its most unique botanical characteristic is intense red-pigmentation in stems and petioles.
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 grape plant named ‘HARBINGER’ as herein illustrated and described.
Read the full patent: US Plant Patent PP36081 in full — the complete specification, every figure, and the file history.