US Plant Patent PP23615
Zanmutang
Chrysanthemum plant named ‘Zanmutang’
UNDER PATENT
Still under patent. Protection ends December 26, 2031.
Twenty years from the filing date would end on September 23, 2031. This patent earned 94 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP23615
- Filed
- September 23, 2011
- Granted
- May 21, 2013
- Expires
- December 26, 2031
- Inventor
- BLOM WILHELMUS BERNARDUS
Abstract
A chrysanthemum plant named ‘Zanmutang’ characterized by its small sized blooms with yellow ray florets and prolific branching; natural season flower date September 20 (week 38) blooming for a period of 4 weeks.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. A new and distinct Chrysanthemum plant named ‘Zanmutang’ as described and illustrated.
Read the full patent: US Plant Patent PP23615 in full — the complete specification, every figure, and the file history.