US Plant Patent PP20381
AU Buck III
Chestnut plant named ‘AU Buck III’
UNDER PATENT
Still under patent. Protection ends January 30, 2028.
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
- PP20381
- Filed
- January 30, 2008
- Granted
- October 6, 2009
- Expires
- January 30, 2028
- Assignee
- UNIV AUBURN
- Inventor
- DOZIER JR W ALFRED; NORTON JOSEPH DANIEL; HANSEN CURTIS J
Abstract
‘AU Buck III’ is a new and distinct Chinese chestnut cultivar that is blight resistant, precocious and an annual bearer. It produces a medium to heavy crop load each year and a medium sized nut. Nut drop begins about September 25 and continues for a 4–5 week period. A large percentage of the nuts drop during the first three weeks of the period that nuts drop from this cultivar. ‘AU Buck III’ is a small to medium sized tree that is round in shape with low, dense, and spreading branches that was 6.71 meters tall, with a canopy covering an area of 41.85 square meters at 20 years old. ‘AU Buck III’ is the third cultivar to mature and drop nuts in a series of four Chinese chestnut cultivars that will provide for a continuous nut drop of a high energy wildlife food source from late August through mid-to-late November.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct cultivar of the species Castanea mollissima Blume named ‘AU Buck III’ as described and illustrated herein.
Read the full patent: US Plant Patent PP20381 in full — the complete specification, every figure, and the file history.