US Plant Patent PP20337
AU Buck II
Chestnut plant named ‘AU Buck II’
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
- PP20337
- Filed
- January 30, 2008
- Granted
- September 22, 2009
- Expires
- January 30, 2028
- Assignee
- UNIV AUBURN
- Inventor
- DOZIER JR W ALFRED; NORTON JOSEPH DANIEL; HANSEN CURTIS J
Abstract
‘AU Buck II’ is a new and distinct Chinese chestnut cultivar that is blight resistant, precocious and prolific. It produces a large nut. Nut drop begins about September 15 and continues for a 6–7 week period. A large percentage of the nuts drop during the first three weeks after the beginning of nut drop. ‘AU Buck II’ nuts mature and start dropping during the early phase of the normal ripening period that most Chinese chestnut cultivars mature and drop nuts in the area. ‘AU Buck II’ is a large tree that was 9.14 meters tall, with a canopy area of 101.36 square meters at 15-years of age. ‘AU Buck II’ is the second 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 II’ as described and illustrated herein.
Read the full patent: US Plant Patent PP20337 in full — the complete specification, every figure, and the file history.