US Plant Patent PP35511
HKHM25
Bunashimeji mushroom named ‘HKHM25’
UNDER PATENT
Still under patent. Protection ends September 7, 2042.
Twenty years from the filing date would end on March 8, 2042. This patent earned 183 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP35511
- Filed
- March 8, 2022
- Granted
- November 28, 2023
- Expires
- September 7, 2042
- Assignee
- HOKUTO CORP
- Inventor
- NAKAGOSHI AYUMI; SEKI AYA; GOTO CHIAKI
Abstract
The present variety of Bunashimeji mushroom named ‘HKHM25’ was cultivated by the gathering and repeated breeding of Bunashimeji mushrooms having thick and elastic stems, dark cap color, strong cap roll, and a large mushroom size, has a high quality and enhanced cultivation stability. This edible mushroom is exquisite in stability, reproducibility and uniformity when being produced.
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, distinct variety of Bunashimeji Mushroom as substantially illustrated and described in the specification.
Read the full patent: US Plant Patent PP35511 in full — the complete specification, every figure, and the file history.