US Plant Patent PP6764
Plum tree
PUBLIC DOMAIN
Patent expired December 28, 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
- PP6764
- Filed
- December 28, 1987
- Granted
- April 25, 1989
- Expires
- December 28, 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
Our new development relates to a distinct variety of plum tree which has the following unique combination of desirable features: 1. The large size of fruit throughout the tree. 2. Heavy and regular production of fruit. 3. Fruit that will stay firm on the tree 2-3 weeks after picking ripe. 4. Fruit with a high degree of attractive blackish blue skin color. 5. The fruit having firm flesh and good shipping quality. 6. Fruit with good flavor and eating 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 plum tree, substantially as illustrated and described, characterized by its large size, vigorous, upright growth and being a productive and regular bearer of large size, firm, clingstone fruit with good eating, storage and shipping quality; the fruit is further characterized by being nearly uniform in size throughout the tree, nearly globose in shape with an attractive blackish blue skin color and maturing approximately 10 days before Queen Ann Plum (non-patent).
Read the full patent: US Plant Patent PP6764 in full — the complete specification, every figure, and the file history.