US Plant Patent PP25415
Chelan Mint
Mint plant named ‘Chelan Mint’
UNDER PATENT
Still under patent. Protection ends June 22, 2033.
Twenty years from the filing date would end on February 27, 2033. This patent earned 115 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP25415
- Filed
- February 27, 2013
- Granted
- April 7, 2015
- Expires
- June 22, 2033
- Assignee
- ESSEX LAB INC
- Inventor
- ROBERTS DONALD D
Abstract
Mint selection 08-6-10, denominated ‘Chelan Mint,’ is a new Mentha piperita cultivar that produces a unique essential oil, a compact plant type and resistance to mint rust ( Puccinia menthae ) and mint wilt ( Verticillium dahlia ).
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 peppermint plant, substantially as shown and described, characterized particularly by improving resistance to mint rust, and producing a unique essential oil.
Read the full patent: US Plant Patent PP25415 in full — the complete specification, every figure, and the file history.