US Plant Patent PP25995
Calypso
Blueberry plant denominated ‘Calypso’
UNDER PATENT
Still under patent. Protection ends January 22, 2034.
Twenty years from the filing date would end on November 1, 2033. This patent earned 82 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP25995
- Filed
- November 1, 2013
- Granted
- October 20, 2015
- Expires
- January 22, 2034
- Assignee
- UNIV MICHIGAN STATE
- Inventor
- HANCOCK JAMES F
Abstract
‘Calypso’ is a new blueberry cultivar of primarily Vaccinium corymbosum . The rest of its parentage is from V. darrowii (13.3%), V. angustifolium (3.8%), V. tenellum (<1%), and V. ashei (<1%). It is a highly productive cultivar with excellent fresh fruit quality. Plants of ‘Calypso’ are vigorous and upright. Its canes are numerous and moderately branched, and the fruit are well exposed. Its berries are large, have small, dry picking scars, medium light blue color, and excellent firmness and flavor. In general, the fruit of ‘Calypso’ has held extremely well on the bush after ripening, except in the unusually hot summers of 2012 in Michigan and Oregon. In that year it was softer than normal, performing similar to ‘Liberty’ under hot conditions.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
What is claimed is: 1. A new and distinct highbush blueberry plant, substantially as illustrated and described herein.
Read the full patent: US Plant Patent PP25995 in full — the complete specification, every figure, and the file history.