US Plant Patent PP4061
Pixy
Plum rootstock--Pixy variety
PUBLIC DOMAIN
Patent expired June 14, 1994. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on June 15, 1996, but this patent ends 732 days earlier — a terminal disclaimer gives term back. A source that calculates twenty years from filing would tell you this plant is still protected when it is already free.
The record
- Patent number
- PP4061
- Filed
- June 15, 1976
- Granted
- June 14, 1977
- Expires
- June 14, 1994
- Assignee
- NAT SEED DEV ORG LTD
- Inventor
- BEAKBANE A BERYL
Abstract
The invention relates to a new and distinct variety of plum tree which is useful as a dwarfing rootstock. Plum trees grown on the understock of this variety attain about two-thirds of the size as those on St. Julien A understock, and are more precociously bearing thereby manifesting a greater cropping efficiency. Also, hedges of this variety exhibit a more spreading habit in contrast to the vigorous upright shoots of St. Julien type rootstocks, and are resistant to bacterial canker.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. A new and distinct variety of plum tree useful as a dwarfing rootstock selected from seedlings of Prunus insititia St. Julien d'Orleans types substantially as illustrated and described which when used as a plum understock induces less growth of the plum tree, and a higher cropping efficiency on the scion.
Read the full patent: US Plant Patent PP4061 in full — the complete specification, every figure, and the file history.