US Plant Patent PP17773
DM 8313-1
Grapevine ‘DM 8313-1’
PUBLIC DOMAIN
Patent expired June 27, 2025. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on January 31, 2025. This patent earned 147 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP17773
- Filed
- January 31, 2005
- Granted
- May 29, 2007
- Expires
- June 27, 2025
- Assignee
- MACGREGOR DAVID W
- Inventor
- MACGREGOR DAVID W
Abstract
A new and distinct grapevine variety named ‘DM 8313-1’ is disclosed. The new variety originated from a hand pollinated cross made at South Haven, Minn., and is distinguishable by virtue of its cold hardiness in USDA Zone 4, combined with its fine muscat flavor similar to Vitis vinifera variety ‘Muscat Blanc.’
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct grapevine substantially as illustrated and described herein.
Read the full patent: US Plant Patent PP17773 in full — the complete specification, every figure, and the file history.