US Plant Patent PP16309
KN30-8
Interspecific Cornus hybrid designated KN30-8
PUBLIC DOMAIN
Patent expired April 11, 2024. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on December 19, 2023. This patent earned 114 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP16309
- Filed
- December 19, 2003
- Granted
- March 7, 2006
- Expires
- April 11, 2024
- Assignee
- UNIV RUTGERS
- Inventor
- ORTON ELWIN R; GANT DAVID A
Abstract
An advanced generation interspecific hybrid of ( Cornus kousa×C. nuttallii ) that is distinguished by its exceptionally high vigor, superior foliage, floriferous display of very attractive and exceptionaly large white floral bracts, high level of winter hardiness, good drought tolerance and high resistance to the incitants of powdery mildew and dogwood anthracnose.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct cultvar of dogwood tree, substantially as herein shown and described, comprising an advanced generation interspecific hybrid of Cornus kousa×C. nuttallii with C. kousa .
Read the full patent: US Plant Patent PP16309 in full — the complete specification, every figure, and the file history.