US Plant Patent PP21938
Blackred XI
Interspecific tree named ‘Blackred XI’
UNDER PATENT
Still under patent. Protection ends December 24, 2029.
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
- PP21938
- Filed
- December 24, 2009
- Granted
- May 31, 2011
- Expires
- December 24, 2029
- 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 very productive tree. Being self-unfruitful, the present variety requires cross pollination from an apricot, plum, or interspecific variety that blooms during the mid to late season, such as ‘Blackred V’ (U.S. Plant Pat. No. 19,576). The present variety's abundance of blossoms and pollen entices strong bee activity to facilitate pollination. The fruit matures under the ecological conditions described early September, with first picking on Sep. 7, 2009. The fruit is medium to large in size, almost entirely black in skin color, clingstone in type, nearly globose in shape, and mostly red in flesh color.
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 ‘Blackred XII’ interspecific tree (U.S. Plant Pat. No. 20,892) by being self-unfruitful and by producing fruit that is clingstone in type, that is mostly globose in shape, that matures in the late season, that is very good in flavor, that is mostly black in skin color, and that is mostly red in flesh color, but is distinguished therefrom by producing fruit that is somewhat larger in size and that matures about two weeks earlier.
Read the full patent: US Plant Patent PP21938 in full — the complete specification, every figure, and the file history.