US Plant Patent PP19595
Royal Helen
Cherry tree named ‘Royal Helen’
UNDER PATENT
Still under patent. Protection ends January 7, 2028.
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
- PP19595
- Filed
- January 7, 2008
- Granted
- December 23, 2008
- Expires
- January 7, 2028
- 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. Heavy and regular production of large size fruit. 2. Fruit with very good flavor and eating quality. 3. Fruit with an attractive red skin color. 4. Fruit maturing in the late season. 5. Fruit with good handling and storage quality. 6. Vigorous, upright growth of tree.
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 late maturing, large size fruit with very good flavor and eating quality; the fruit is further characterized by its attractive red skin color, its good handling and storage qualities, and in comparison to ‘Royal Dawn’ Cherry (U.S. Plant Pat. No. 13,131) the fruit of the new variety is larger in size and matures approximately 22 days later.
Read the full patent: US Plant Patent PP19595 in full — the complete specification, every figure, and the file history.