US Plant Patent PP15186
Montana
Dahlia plant named ‘Montana’
PUBLIC DOMAIN
Patent expired December 17, 2023. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on October 31, 2023. This patent earned 47 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP15186
- Filed
- October 31, 2003
- Granted
- September 28, 2004
- Expires
- December 17, 2023
- Inventor
- VAN HAASTER JOHANNA G H
Abstract
A new cultivar of Dahlia plant named ‘Montana’ that is characterized by a short crop time of 6 to 7 weeks, a compact, upright and uniform growth habit, good branching and yellow inflorescences with ray florets only. In combination, these traits set ‘Montana’ apart from all other existing varieties of Dahlia known to the inventor.
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 variety of Dahlia plant named ‘Montana’ as described and illustrated.
Read the full patent: US Plant Patent PP15186 in full — the complete specification, every figure, and the file history.