US Plant Patent PP6726
Japanese pear tree
PUBLIC DOMAIN
Patent expired March 13, 2007. 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
- PP6726
- Filed
- March 13, 1987
- Granted
- April 11, 1989
- Expires
- March 13, 2007
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
Disclosed herein is a Japanese pear tree which has a moderate vigor and an easily maintained moderate spur development, is resistant to black spot disease, and as productive as `Hosui`. The tree is cross-incompatible with `Kosui` and is assumed to have an S 4 S 5 genotype, and has brown young leaves and white large flowers which have a pale red color at the pit at fat bud and bloom middle to late in the season and at almost the same time as `Nijisseiki`. The tree can produce an oblate-shaped fruit which matures early in the season, earlier than `Nijisseiki`, and has a normal keeping quality. The fruit has a large size which is larger than that of `Nijisseiki`, a skin which is covered partly with russet when cultivated without bagging, is at early maturity of the yellowish green color identified in the Munsel® Book of Color as follows: Hue symbol: 2.5 gy Chroma: 6 Value: 9, and is at full maturity of the yellow color identified in the Munsel® Book of Color as follows: Hue symbol: 10 y Chroma: 6 Value: 9, and a white flesh which is soft, crisp and very juicy, with a high sweetness, a lower acidity, no astringency, and a slight 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 known Japanese pear trees by (A) having a moderate vigor, an easily maintained moderate spur development, a resistance to black spot disease and no sensitivity to pear necrotic spot disease, (B) being as productive as `Hosui`, (C) being cross-imcompatible with `Kosui` and being assumed to have a S 4 S 5 genotype, (D) having brown young leaves and white large flowers which have a pale red color at the pit at fat bud and bloom middle to late in the season and at almost the same time as `Nijisseiki`, and (E) producing an oblate-shaped fruit (a) maturing early in the season and about two weeks earlier than `Nijisseiki` and (b) having (1) a large size which is larger than that of `Nijisseiki` (2) a skin with somewhat large dots, which is covered partly with more russet when cultivated without bagging than shown by `Nijisseiki` under the same condition, the color of the skin being at early maturity of the yellowish green color identified in the Munsel® Book of Color as follows: Hue symbol: 2.5 gy Chroma: 6 Value: 9, and at full maturity of the yellow color identified in the Munsel® Book of Color as follows: Hue Symbol: 10 y Chroma: 6 Value: 9, (3) a white flesh which is soft, crisp and very juicy, with a high sweetness, a low acidity, no astringency, and a slight aromatic flavor, giving an excellent dessert quality, and (4) a normal keeping quality when compared with other cultivars having the same harvesting time as this new variety of Japanese pear tree.
Read the full patent: US Plant Patent PP6726 in full — the complete specification, every figure, and the file history.