US Plant Patent PP4678
Mark
Apple rootstock tree
PUBLIC DOMAIN
Patent expired November 5, 1999. 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
- PP4678
- Filed
- November 5, 1979
- Granted
- March 31, 1981
- Expires
- November 5, 1999
- Assignee
- UNIV MICHIGAN STATE
- Inventor
- CARLSON ROBERT F
Abstract
This apple rootstock originated as a single seedling selected from a group of seedlings obtained from open-pollinated Malling 9 rootstock. It was chosen because of its dwarfing characteristics. It has been increased by vegetative propagation, such as stooling, and by soft- and hard-wood cuttings. Also, this clone is compatible with commercial apple cultivars.
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 apple tree referred to by the cultivar name MAC-9 and substantially as herein shown and described characterized particularly by its improved ability to serve as a rootstock for grafting of apple tree cultivars to produce dwarf or semi-dwarf apple trees which are early bearing, have a strong graft and have a well anchored root system without root shoots.
Read the full patent: US Plant Patent PP4678 in full — the complete specification, every figure, and the file history.