US Plant Patent PP6628
Avocado tree called Thomas
PUBLIC DOMAIN
Patent expired September 21, 2007. This plant is in the public domain — anyone may propagate and sell it.
No term adjustment or disclaimer is recorded against this patent, so this is the full statutory term — twenty years from the filing date.
The record
- Patent number
- PP6628
- Filed
- September 21, 1987
- Granted
- February 21, 1989
- Expires
- September 21, 2007
No cultivar name of record
This patent does not name the plant. Through the 1980s and early 1990s that was still common: naming every new cultivar only became standard practice as plants began to be marketed under brand names. 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
A new and distinct rootstock variety of avocado tree characterized by its high field resistance to Phytophthora root rot caused by Phytophthora cinnamomi. This variety has the highest level of resistance of any rootstock currently identified. It is characterized by relative ease of propagation using the etiolation method and graft compatibility with commercial scion varieties, including 'Hass', 'Gwen' 'Pinkerton', 'Fuerte', 'Bacon' and 'Zutano'.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
We claim: 1. The new and distinct rootstock variety of avocado tree herein described and illustrated and identified by the characteristics enumerated above.
Read the full patent: US Plant Patent PP6628 in full — the complete specification, every figure, and the file history.