US Plant Patent PP21299
Sweeten
Tamarillo plant named ‘Sweeten’
UNDER PATENT
Still under patent. Protection ends April 24, 2029.
Twenty years from the filing date would end on September 9, 2028. This patent earned 227 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP21299
- Filed
- September 9, 2008
- Granted
- September 21, 2010
- Expires
- April 24, 2029
- Assignee
- HORTICULTURE & FOOD RES INST O
- Inventor
- PRINGLE GREG
Abstract
A new and distinct tamarillo variety is described. The variety results from selection among a population of seedlings derived from hybridization among red, amber, and yellow-fruited tamarillo selections. This new variety is characterized by bright red skin color and sweet flavor. The new variety appears suitable for the fresh fruit market and has been named ‘Sweeten’.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
1. A new and distinct tamarillo plant substantially as herein illustrated and described.
Read the full patent: US Plant Patent PP21299 in full — the complete specification, every figure, and the file history.