US Plant Patent PP7758
Chikusui
Japanese pear tree "Chikusui"
PUBLIC DOMAIN
Patent expired March 15, 2010. 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
- PP7758
- Filed
- March 15, 1990
- Granted
- December 31, 1991
- Expires
- March 15, 2010
Abstract
Disclosed herein is a Japanese pear tree having a moderate vigor and an easily maintained moderate spur development, a high resistance to black spot disease and a high productivity. This tree produces an oblate-shaped fruit which matures early in the season, i.e., from the start to the middle of August, in the central part of the Kanto district, Japan. The fruit has a medium size and the same weight as `Kosui`, i.e., 250 to 300 g, a yellowish brown skin, and a white flesh which is soft, crisp and very juicy with a high Brix the pH of the juice being about 5.2, a particular smell without aromatic flavor, giving an excellent dessert quality.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
We claim: 1. A new and distinct variety of Japanese pear tree, substantially as illustrated and described herein, characterized over the known Japanese pear trees by having a moderate vigor, a good maintained spur, a strong resistance to black spot disease and no sensitivity to pear necrotic spot disease; having green leaves and young leaves and white flowers; a large amount of fruit which has a yellowish brown skin and an oblate shape; and a flesh which is white in color, soft, crisp and very juicy, with a high sweetness, a low acidity, no astringency, a particular smell without aromatic flavor; and a harvesting stage of the fruit being early in the season.
Read the full patent: US Plant Patent PP7758 in full — the complete specification, every figure, and the file history.