US Plant Patent PP23270
HJ-6
Blackberry plant named ‘HJ-6’
UNDER PATENT
Still under patent. Protection ends March 24, 2031.
Twenty years from the filing date would end on March 7, 2031. This patent earned 17 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP23270
- Filed
- March 7, 2011
- Granted
- December 25, 2012
- Expires
- March 24, 2031
- Inventor
- JOHNSON JR HAROLD A; JOHNSON JUDITH E
Abstract
This invention relates to a new and distinct variety of blackberry plant named ‘HJ-6’. The new variety resulted from seed produced by a hand-pollinated cross of two non-patented varieties: “Obsidian” as the female, and “Eaton” as the male. The new, trailing cultivar can be distinguished by its consistent, large fruit size and appearance during the late spring and summer period for the fresh market. The fruit of this cultivar is produced on dark red, strong, thorny canes. When plants are grown and pruned correctly, yield in central California, USA can be up to 9,000 crates/acres, and the fruit ships well.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct plant of Rubus Ursinus, as herein described and illustrated by the characteristics set forth above.
Read the full patent: US Plant Patent PP23270 in full — the complete specification, every figure, and the file history.