US Plant Patent PP28596
PLUMSWEET XIX
Plum tree named ‘PLUMSWEET XIX’
UNDER PATENT
Still under patent. Protection ends January 3, 2036.
Twenty years from the filing date would end on December 11, 2035. This patent earned 23 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP28596
- Filed
- December 11, 2015
- Granted
- November 7, 2017
- Expires
- January 3, 2036
- Assignee
- BRADFORD LOWELL GLEN, QUISENBERRY JON M
- Inventor
- BRADFORD LOWELL GLEN; QUISENBERRY JON M
Abstract
The present invention relates to a plum tree, Prunus salicina , and more particularly to a new and distinct variety broadly characterized by a medium size, moderately vigorous, hardy, and productive tree. Being self-unfruitful, the present variety requires cross pollination from an apricot, interspecific, or plum that blooms during the mid season, such as ‘September Yummy’ plum tree (U.S. Plant Pat. No. 14,220). The present variety's abundance of blossoms and moderate pollen production entices strong bee activity to facilitate pollination. The fruit matures under the ecological conditions described during mid to late July, with first picking on Jul. 13, 2015, and will hang on the tree for at least three weeks. The fruit is uniformly medium in size, red over a green background with dark red dappling in skin color, clingstone in type, globose to oblate with some asymmetry in shape, full red in flesh color, very firm and crisp in texture, very sweet, and excellent in flavor.
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, that is most similar to ‘Plumsweet XIV’ (U.S. Plant Pat. No. 23,686) interspecific tree by being self-unfruitful, by blooming in the mid season, and by producing fruit that is sweet and excellent in flavor, primarily a red and green two-tone in skin color, and clingstone in type, but is quite distinguished therefrom by producing fruit that is larger in size, that is moderately asymmetrical in shape, that has dark red dappling on the skin, and that matures about seven days later.
Read the full patent: US Plant Patent PP28596 in full — the complete specification, every figure, and the file history.