US Plant Patent PP25984
PIIDIST-IV
Distylium plant named ‘PIIDIST-IV’
UNDER PATENT
Still under patent. Protection ends March 14, 2034.
Twenty years from the filing date would end on October 16, 2033. This patent earned 149 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP25984
- Filed
- October 16, 2013
- Granted
- October 13, 2015
- Expires
- March 14, 2034
- Inventor
- DIRR MICHAEL A; KARDOS JOSHUA H
Abstract
A new and distinct cultivar of Distylium plant named ‘PIIDIST-IV’, characterized by its compact, upright growth habit, reddish new growth, lustrous, leathery, dark green mature foliage, resistance to insects and disease, and tolerance of wet and dry soil conditions.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
We claim: 1. A new and distinct Distylium plant named ‘PIIDIST-IV’, as illustrated and described herein.
Read the full patent: US Plant Patent PP25984 in full — the complete specification, every figure, and the file history.