US Plant Patent PP16413
Interspecific tree
PUBLIC DOMAIN
Patent expired April 10, 2025. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on November 2, 2024. This patent earned 159 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP16413
- Filed
- November 2, 2004
- Granted
- April 4, 2006
- Expires
- April 10, 2025
- Inventor
- ZAIGER GARY NEIL; GARDNER LEITH MARIE; ZAIGER GRANT GENE
No cultivar name of record
This patent does not name the plant, which is unusual for its date — by the mid-1990s nearly every plant patent carried a cultivar name. The grant identifies this one by its number and by a written description instead.
Nothing here is missing from our records: the patent itself states no name. Where one exists we show it, and we do not invent one.
Abstract
A new and distinct variety of interspecific tree [(plum×plumcot)×plumcot]. 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 combinations of desirable features: 1. Fruit with an attractive red flesh color. 2. Fruit with excellent flavor and eating quality. 3. Fruit having a good balance between sugar and acid with an average Brix of 17.7°. 4. The tree with a vigorous, upright growth habit. 5. Fruit with an attractive reddish maroon 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 medium to large, red flesh, clingstone fruit with excellent flavor and eating quality; in comparison to the early maturing fruit of ‘Red Beaut’ Plum (U.S. Plant Pat. No. 2,539), the fruit of the present variety is larger in size, has red flesh compared to yellow and is approximately 6 days later in maturity.
Read the full patent: US Plant Patent PP16413 in full — the complete specification, every figure, and the file history.