US Plant Patent PP21906
Royal Marie
Cherry tree named ‘Royal Marie’
UNDER PATENT
Still under patent. Protection ends December 24, 2029.
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
- PP21906
- Filed
- December 24, 2009
- Granted
- May 10, 2011
- Expires
- December 24, 2029
- Inventor
- ZAIGER GARY NEIL; GARDNER LEITH MARIE; ZAIGER GRANT GENE
Abstract
A new and distinct variety of cherry tree ( Prunus avium ). The following features of the tree and its fruit are characterized with the tree budded on ‘Mahaleb’ Rootstock (non-patented), grown on Handford sandy loam soil with Storie Index rating 95, in USDA Hardiness Zone 9, near Modesto, Calif., with standard commercial fruit growing practices, such as pruning, thinning, spraying, irrigation and fertilization. Its novelty consist of the following combination of desirable features: 1. Vigorous and upright tree growth. 2. Early blooming with a low winter chilling requirement of approximately 500 hours at or below 45° F. 3. Regular and productive bearer of large size fruit. 4. Fruit maturing in the early season. 5. Fruit with an attractive red skin color. 6. Fruit with good flavor and eating quality.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct variety of cherry tree, substantially as illustrated and described.
Read the full patent: US Plant Patent PP21906 in full — the complete specification, every figure, and the file history.