US Plant Patent PP22208
HBOK 50
Peach rootstock named ‘HBOK 50’
UNDER PATENT
Still under patent. Protection ends February 3, 2030.
Twenty years from the filing date would end on December 17, 2029. This patent earned 48 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP22208
- Filed
- December 17, 2009
- Granted
- October 25, 2011
- Expires
- February 3, 2030
- Assignee
- UNIV CALIFORNIA, US AGRICULTURE
- Inventor
- BLISS FREDRICK A; ALMEHDI ALI A; DEJONG THEODORE M; GILLEN ANNE; LEDBETTER CRAIG A
Abstract
A new and distinct variety of peach rootstock denominated ‘HBOK 50’ is described. The ‘HBOK 50’ peach rootstock offers size control ability, root knot nematode resistance, less wood from dormant and summer pruning, and production of fewer root suckers. ‘HBOK 50’ has contributed to size reduction of compound trees when it is used as a clonally-produced rootstock with the fresh market peach “O'Henry”. No evidence of graft incompatibility or other abnormalities have been noted in such circumstances. Fruit on compound trees with ‘HBOK 50’ rootstocks is either similar in size or smaller than ‘Nemaguard’. The ‘HBOK 50’ rootstock displays root knot nematode resistance levels similar to ‘Nemaguard’ and more resistant than ‘Lovell’.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct variety of peach rootstock designated ‘HBOK 50’ as shown and described herein.
Read the full patent: US Plant Patent PP22208 in full — the complete specification, every figure, and the file history.