US Plant Patent PP16289
TDE4
Mandarin hybrid tree named ‘TDE4’
PUBLIC DOMAIN
Patent expired January 30, 2023. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on June 20, 2022. This patent earned 224 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP16289
- Filed
- June 20, 2002
- Granted
- February 28, 2006
- Expires
- January 30, 2023
- Assignee
- UNIV CALIFORNIA
- Inventor
- ROOSE MIKEAL L; WILLIAMS TIMOTHY E; SOOST ROBERT K; CAMERON JAMES W
Abstract
A new mandarin hybrid called “TDE4” is distinguished by production of fruit that combine mid-late season maturity, large fruit size, attractive deep orange rind color and virtual absence of seeds with rich fruit flavor.
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 mandarin hybrid tree having substantially the characteristics described and illustrated herein.
Read the full patent: US Plant Patent PP16289 in full — the complete specification, every figure, and the file history.