US Plant Patent PP18666
PLUMSWEET IX
Interspecific tree named ‘PLUMSWEET IX’
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
- PP18666
- Filed
- December 7, 2006
- Granted
- March 25, 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 medium size, 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 to late season. The fruit matures under the ecological conditions described during late August, with first picking on Aug. 24, 2006. The fruit is uniformly large in size, a yellowish green and red two-tone in skin color, semi-freestone in type, globose to somewhat cordate is shape, mostly red in flesh color, firm 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 most similar to ‘PLUMSWEETTHREE’ (U.S. Plant Pat. No. 15,235) interspecific plum tree by being self-unfruitful and by producing fruit that is a red and yellowish green two-tone in skin color, semi-freestone in type, and large in size, but is distinguished therefrom by producing fruit that has a significant amount of red in the flesh color and that matures about six days later.
Read the full patent: US Plant Patent PP18666 in full — the complete specification, every figure, and the file history.