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US Plant Patent PP17976

Stokes purple

Sweetpotato plant named ‘Stokes purple’

PUBLIC DOMAIN

Patent expired December 17, 2025. This plant is in the public domain — anyone may propagate and sell it.

Twenty years from the filing date would end on October 5, 2025. This patent earned 73 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP17976, the photograph of Stokes purple printed in the patent.
Figure 1 from US Plant Patent PP17976, reproduced as printed. Photographs in a plant patent are taken by the applicant. Reproduction of the patent document is permitted; the image is shown whole and uncropped for that reason.

The record

Patent number
PP17976
Filed
October 5, 2005
Granted
September 4, 2007
Expires
December 17, 2025
Assignee
PRIDDY JR DAVID A, SIZEMORE MICHAEL E, SLATE RUSSEL L
Inventor
SIZEMORE MICHAEL E; SLATE RUSSEL L; PRIDDY JR DAVID A

Abstract

A new and distinct variety of Ipomoea batatas called ‘Stokes purple’ is shown and described. The plant is a prostrate vine, producing several branching vines off the main vine with tri-lobed leaves. The ‘Stokes purple’ plant is distinguished by its storage root, which has purple flesh and purple skin.

Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.

1. A new and distinct variety of Ipomoea batatas plant, substantially as herein described and illustrated.

Read the full patent: US Plant Patent PP17976 in full — the complete specification, every figure, and the file history.