US Plant Patent PP28468
Plumcandy XIII
Plum tree named ‘Plumcandy XIII’
UNDER PATENT
Still under patent. Protection ends January 12, 2036.
Twenty years from the filing date would end on December 11, 2035. This patent earned 32 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP28468
- Filed
- December 11, 2015
- Granted
- October 3, 2017
- Expires
- January 12, 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 large size, vigorous, hardy, and somewhat irregularly productive tree. Being self-unfruitful, the present variety requires cross pollination from another plum that blooms during the mid season, such as ‘Yummyrosa’ plum (U.S. Plant Pat. No. 13,476). The fruit matures under the ecological conditions described in mid to late October, with first picking on Oct. 16, 2015, and has the ability to hang firm on the tree for another three weeks. The fruit is uniformly medium in size, full red in skin color, freestone in type, purely yellow in flesh color, very firm in texture, juicy, typically 22 to 24 brix, 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 ‘September Yummy’ (U.S. Plant Pat. No. 14,220) plum by having a large tree, by being self-unfruitful, and by producing plums that are nearly full red with moderate freckling in skin color, mostly yellow in flesh color, juicy, firm in texture, but is distinguished therefrom by being more irregular in setting and by producing plums that are sweeter in flavor, that are oblate instead of globose in shape, and that ripen about thirty days later.
Read the full patent: US Plant Patent PP28468 in full — the complete specification, every figure, and the file history.