US Plant Patent PP27664
STEFAN FRANCZAK
Clematis plant named ‘STEFAN FRANCZAK’
UNDER PATENT
Still under patent. Protection ends April 24, 2035.
Twenty years from the filing date would end on December 29, 2034. This patent earned 116 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP27664
- Filed
- December 29, 2014
- Granted
- February 14, 2017
- Expires
- April 24, 2035
- Assignee
- MARCZYNSKI SZCZEPAN
- Inventor
- MARCZYNSKI SZCZEPAN
Abstract
A new and distinct Clematis hybrid named ‘STEFAN FRANCZAK’ is disclosed, characterized by extremely floriferous plants producing blue-violet, medium size flowers, with undulating margins, and light yellow stamens. Plants bloom over a long period and exhibit compact growth. The new cultivar is a Clematis typically suited for ornamental container and landscape use.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
What is claimed is: 1. A new and distinct cultivar of Clematis hybrid plant named ‘STEFAN FRANCZAK’ as herein illustrated and described.
Read the full patent: US Plant Patent PP27664 in full — the complete specification, every figure, and the file history.