US Plant Patent PP7195
Willamette Chestnut
PUBLIC DOMAIN
Patent expired June 13, 2008. This plant is in the public domain — anyone may propagate and sell it.
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
- PP7195
- Filed
- June 13, 1988
- Granted
- March 13, 1990
- Expires
- June 13, 2008
No cultivar name of record
This patent does not name the plant. Through the 1980s and early 1990s that was still common: naming every new cultivar only became standard practice as plants began to be marketed under brand names. 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 medium size hybrid chestnut tree, having an upright and widely spreading form and glossy dark green foliage with prolific, sweet scented flowers appearing after leaf out in spring; the tree being a regular and very productive bearer of extremely large, chocolate brown, very sweet and easy-to-peel nuts, the nuts ripening and falling free from the burrs in mid-September; the tree also displaying a high genetic resistance to the chestnut bark blight (Endothia parasitica), being bred from the same line of hybrid chestnut trees as the Revival Chestnut (U.S. Plant Pat. No. 5,537), the Heritage Chestnut (U.S. Plant Pat. No. 6,574), and the Carolina Chestnut (U.S. Plant Pat. No. 7,041), the present variety itself not showing any instance of blight infection in 12 years of growth in the orchard.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. A new and distinct variety of hybrid chestnut tree, substantially as illustrated and described, which is of medium size, upright and widely spreading form, with large, glossy, dark green oblong leaves with dentate margins, flowering late and profusely after leaf out in spring; the tree being a regular and very prolific bearer of extremely large, chocolate brown, very sweet and easy-to-peel nuts that ripen in mid-September and are released easily from the burrs for easy harvesting; the trees showing a high genetic resistance to the chestnut bark blight; and the trees being especially characterized by having the combination of good orchard form, blight resistance.
Read the full patent: US Plant Patent PP7195 in full — the complete specification, every figure, and the file history.