US Plant Patent PP19920
Royal Hazel
Cherry tree named ‘Royal Hazel’
UNDER PATENT
Still under patent. Protection ends December 26, 2027.
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
- PP19920
- Filed
- December 26, 2007
- Granted
- April 14, 2009
- Expires
- December 26, 2027
- Inventor
- ZAIGER GARY NEIL; GARDNER LEITH MARIE; ZAIGER GRANT GENE
Abstract
A new and distinct variety of cherry tree. 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. A low chilling requirement of approximately 500 hours at or below 45° F. 2. Fruit maturing in the early season. 3. Fruit with an attractive red skin color. 4. Fruit with very good flavor and eating quality. 5. The ability of the fruit to remain firm on the tree 7 days past maturity. 6. Heavy and regular production of large size fruit.
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, characterized by its large size, vigorous, upright growth and being a regular and productive bearer of early maturing, large size fruit that have the ability to remain firm on the tree 7 days past maturity (shipping ripe); the fruit is further characterized by its attractive red skin color, very good flavor and eating quality, and in comparison to ‘Bing’ Cherry (non-patented), the new variety blooms approximately 10 days earlier and the fruit matures approximately 12 days earlier.
Read the full patent: US Plant Patent PP19920 in full — the complete specification, every figure, and the file history.