US Plant Patent PP17254
MAY PEARL
Nectarine tree named ‘MAY PEARL’
PUBLIC DOMAIN
Patent expired February 2, 2026. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on December 20, 2025. This patent earned 44 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP17254
- Filed
- December 20, 2005
- Granted
- December 5, 2006
- Expires
- February 2, 2026
- Assignee
- BRADFORD LOWELL GLEN
- Inventor
- BRADFORD LOWELL GLEN
Abstract
The present invention relates to a nectarine tree and more particularly to a new and distinct variety broadly characterized by a medium size, vigorous, half-hardy, self-fertile, productive and regular bearing tree. The fruit matures under the ecological conditions described in mid May, with first picking on May 17, 2005 . The fruit is uniformly medium in size, excellent in flavor, globose to slightly oblong in shape, clingstone in type, firm in texture, white in flesh color, and mostly red in skin color. The variety was developed as a first generation cross using ‘June Pearl’ (U.S. Plant Pat. No. 9,360) white flesh nectarine as the selected seed parent and ‘Rose Diamond’ (U.S. Plant Pat. No. 7,421) as the selected pollen parent.
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 nectarine tree, substantially as illustrated and described, that is most similar to ‘Early Pearl’ (U.S. Plant Pat. No. 14,248) nectarine, by producing nectarines that are firm in texture, sub-acidic and sweet in flavor, clingstone in type, mostly red in skin color, and white in flesh color, but is distinguished therefrom by having a much larger blossom with a higher percentage of double blossoms, by requiring much less chilling, and by producing fruit that matures about ten days earlier.
Read the full patent: US Plant Patent PP17254 in full — the complete specification, every figure, and the file history.