US Plant Patent PP25690
Blue Silk
Blueberry plant named ‘Blue Silk’
UNDER PATENT
Still under patent. Protection ends June 1, 2033.
Twenty years from the filing date would end on March 8, 2033. This patent earned 85 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP25690
- Filed
- March 8, 2013
- Granted
- July 14, 2015
- Expires
- June 1, 2033
- Assignee
- NZ INST PLANT & FOOD RES LTD
- Inventor
- SCALZO JESSICA; PATEL NARANDRA
Abstract
A new and distinct blueberry variety is described. The variety results from selection among a population of seedlings derived from the controlled cross of the varieties ‘Elliott’ (not patented) and ‘Puru’ (U.S. Plant Pat. No. 6,701). The new variety is distinguished from others by its late seasonality, fruit size, and plant habit. Fruit of ‘Blue Silk’ is medium-large in size with a medium-strong bloom.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
The invention claimed is: 1. A new and distinct blueberry plant substantially as illustrated and described herein.
Read the full patent: US Plant Patent PP25690 in full — the complete specification, every figure, and the file history.