US Plant Patent PP18687
Plumsweet VI
Interspecific tree named ‘Plumsweet VI’
UNDER PATENT
Still under patent. Protection ends December 7, 2026.
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
- PP18687
- Filed
- December 7, 2006
- Granted
- April 1, 2008
- Expires
- December 7, 2026
- Assignee
- BRADFORD LOWELL GLEN
- Inventor
- BRADFORD LOWELL GLEN
Abstract
The present invention relates to an interspecific tree and more particularly to a new and distinct variety broadly characterized by a large size, vigorous, hardy, and fairly productive tree. Being self-unfruitful, the present variety requires cross pollination from an apricot, plum, or interspecific that blooms during the early to mid season. The fruit matures under the ecological conditions described during mid June, with first picking on Jun. 20, 2006. The fruit is uniformly medium in size, mostly red with heavy greenish yellow freckling in skin color, clingstone in type, somewhat oblate in shape, red to pink in flesh color, very firm and crisp in texture, and excellent in flavor.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct variety of interspecific Prunus sp. tree, substantially as illustrated and described, that is similar to ‘YUMMYgem’ (U.S. Plant Pat. No. 15,809) plum by being self-unfruitful and by producing fruit that is sweet in flavor and clingstone in type, but is distinguished therefrom by producing fruit that is somewhat larger in size, that is oblate in shape, that is pink to red instead of yellow in flesh color, that has heavy greenish yellow freckling on the skin, and that matures about ten days later.
Read the full patent: US Plant Patent PP18687 in full — the complete specification, every figure, and the file history.