US Plant Patent PP33787
UMNAZ633
Rhododendron plant named ‘UMNAZ633’
UNDER PATENT
Still under patent. Protection ends April 8, 2041.
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
- PP33787
- Filed
- April 8, 2021
- Granted
- December 28, 2021
- Expires
- April 8, 2041
- Assignee
- UNIV MINNESOTA
- Inventor
- HOKANSON STANLEY; MCNAMARA STEVEN THOMAS
Abstract
A new cultivar of hybrid Rhododendron plant named ‘UMNAZ633’ that is characterized by its rounded plant form with compactly branched plant habit; reaching 1 m in height and width after 15 years of growth, its abundance of flowers that are red in color in mid to late May in Excelsior, Minn. with the red color retained throughout the bloom period without substantial fading prior to abscission, its good cold hardiness with flower buds that are resistant to cold damage and consistently bloom even when exposed to temperatures as low as −25°, and its foliage with relatively good tolerance to powdery mildew.
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 cultivar of Rhododendron plant named ‘UMNAZ633’ as herein illustrated and described.
Read the full patent: US Plant Patent PP33787 in full — the complete specification, every figure, and the file history.