US Plant Patent PP15228
K146-43
Peach and nectarine rootstock named ‘K146-43’
PUBLIC DOMAIN
Patent expired May 30, 2023. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on May 15, 2023. This patent earned 15 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP15228
- Filed
- May 15, 2003
- Granted
- October 12, 2004
- Expires
- May 30, 2023
- Assignee
- UNIV CALIFORNIA, US AGRICULTURE
- Inventor
- DEJONG THEODORE; RAMMING DAVID; JOHNSON R SCOTT; DOYLE JAMES
Abstract
The ‘K146-43’ rootstock is an inter-specific hybrid rootstock, useful primarily as a commercial understock for peach and nectarine cultivars. The stock has been successfully propagated clonally by hardwood cuttings. This rootstock imparts a substantial degree of vigor control to the scion cultivar that is propagated on top of it. The utilization of adapted growth controlling rootstocks in commercial orchard situations reduces the height of the individual orchard tree without compromising the quality of the fruit. This in turn increases the efficiency of various cultural operations such as pruning, thinning and harvesting by reducing the need for workers in the field to use tall ladders when carrying out these operations.
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 peach and nectarine rootstock plant, ‘K146-43’, as herein described and illustrated.
Read the full patent: US Plant Patent PP15228 in full — the complete specification, every figure, and the file history.