US Plant Patent PP16491
Flavor Rouge
Interspecific tree named: ‘Flavor Rouge’
PUBLIC DOMAIN
Patent expired June 14, 2025. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on December 6, 2024. This patent earned 190 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP16491
- Filed
- December 6, 2004
- Granted
- May 2, 2006
- Expires
- June 14, 2025
- Inventor
- ZAIGER GARY NEIL; GARDNER LEITH MARIE; ZAIGER GRANT GENE
Abstract
A new and distinct variety of interspecific tree [ Prunus salicina× ( Prunus salicina×Prunus armeniaca )]. The following features of the tree and its fruit are characterized with the tree budded on ‘Nemaguard’ 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. Fruit with very good flavor and eating quality. 2. Fruit with a high average Brix of 19.2°. 3. Heavy and regular bearer of fruit. 4. Fruit holding firm on the tree 2 weeks after maturity (shipping ripe). 5. Vigorous, upright tree growth. 6. Fruit with an attractive red skin color.
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 interspecific tree, substantially as illustrated and described, characterized by its large size, vigorous, upright growth and being a productive and regular bearer of small to medium size, clingstone fruit with very good flavor and eating quality; the fruit is further characterized by having firm flesh, holding firm on the tree 2 weeks after maturity (shipping ripe), and in comparison to the ‘Red Beaut’ Plum, the new variety has multicolored flesh compared to yellow and is approximately 10 days later in maturity.
Read the full patent: US Plant Patent PP16491 in full — the complete specification, every figure, and the file history.