US Plant Patent PP35016
G.257
Apple tree rootstock named ‘G.257’
UNDER PATENT
Still under patent. Protection ends January 31, 2042.
No term adjustment or disclaimer is recorded against this patent, so this is the full statutory term — twenty years from the filing date.

The record
- Patent number
- PP35016
- Filed
- January 31, 2022
- Granted
- March 7, 2023
- Expires
- January 31, 2042
- Assignee
- US AGRICULTURE, UNIV CORNELL
- Inventor
- FAZIO GENNARO; ROBINSON TERENCE LEE; ALDWINCKLE HERBERT SANDERS; CUMMINS JAMES N
Abstract
A new and distinct variety of apple tree rootstock Malus domestica x Malus robusta hybrid ‘G.257’ is described. The new variety is a semi-dwarfing rootstock that is resistant to fire blight (Erwinia amylovora) and crown rot (Phytophthora cactorum) and tolerant to the replant disease complex. The ‘G.257’ rootstock is useful in that it can be propagated clonally and used as a rootstock or root system for apple trees as well as for interstems of apple trees.
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 variety of apple tree rootstock named ‘G.257’ as herein described and illustrated.
Read the full patent: US Plant Patent PP35016 in full — the complete specification, every figure, and the file history.