US Plant Patent PP35551
MN121
Pear tree named ‘MN121’
UNDER PATENT
Still under patent. Protection ends February 8, 2042.
Twenty years from the filing date would end on January 25, 2043, but this patent ends 351 days earlier — a terminal disclaimer gives term back. A source that calculates twenty years from filing would tell you this plant is still protected when it is already free.

The record
- Patent number
- PP35551
- Filed
- January 25, 2023
- Granted
- December 19, 2023
- Expires
- February 8, 2042
- Assignee
- UNIV MINNESOTA
- Inventor
- BEDFORD DAVID S; LUBY JAMES J
Abstract
A new cultivar of pear tree named ‘MN121’ that is characterized by its good cold hardiness in U.S.D.A. Zone 4; observed for 30 years, its lack of fire blight infection in field observations on test trees, its fruit with a storage life of approximately three months in refrigerated storage with ambient atmosphere, its fruit that ripen in mid-August in central Minnesota, its fruit with a crisp texture and a sweet and pleasing flavor similar to that of an Asian pear, its fruit that is oval to elliptic in shape, and its fruit that may be picked ripe for immediate consumption with no after-ripening required.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
It is claimed: 1. A new and distinct variety of pear tree named ‘MN121’ as herein illustrated and described.
Read the full patent: US Plant Patent PP35551 in full — the complete specification, every figure, and the file history.