US Plant Patent PP15597
Strawberry plant named PS-2880
PUBLIC DOMAIN
Patent expired February 25, 2024. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on October 6, 2023. This patent earned 142 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP15597
- Filed
- October 6, 2003
- Granted
- March 1, 2005
- Expires
- February 25, 2024
- Inventor
- ACKERMAN STEPHEN M; NELSON MICHAEL D; NELSON STEVEN D
No cultivar name of record
This patent does not name the plant, which is unusual for its date — by the mid-1990s nearly every plant patent carried a cultivar name. The grant identifies this one by its number and by a written description instead.
Nothing here is missing from our records: the patent itself states no name. Where one exists we show it, and we do not invent one.
Abstract
This invention relates to a new and distinct day-neutral variety of strawberry plant named PS-2880. This new variety is primarily adapted to the growing conditions of the central coast of California. The new variety is primarily characterized by its medium to large sized plant, many crowns per plant, low frequency of small to very small bract leaflets on the petioles, long petiolules, large diameter stolons, strong stolon pubescence, high number of sepals per berry, conical to wedged shaped fruit, absent to very narrow band without achenes on the fruit, achenes set more consistently above the fruit, spreading to reflexed calyx segments, calyx which is weakly attached to the fruit and strongly expressed hollow center.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct strawberry plant named ‘PS-2880’, as herein described and illustrated by the characteristics set forth above.
Read the full patent: US Plant Patent PP15597 in full — the complete specification, every figure, and the file history.