US Plant Patent PP4999
Asparagus Plant No. 22
PUBLIC DOMAIN
Patent expired January 21, 2001. 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
- PP4999
- Filed
- January 21, 1981
- Granted
- March 15, 1983
- Expires
- January 21, 2001
- Assignee
- RESEARCH CORP
- Inventor
- ELLISON J HOWARD
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
An asparagus plant having particularly valuable male characteristics and suitable for use in production of edible spears and of hybrids since it transmits high yield, rust resistance, and good field tolerance to root rot (Fusarium oxysporum) and crown rot (F. moniliforme) which would otherwise limit production, enabling growth where standard susceptible cultivars cannot be grown profitably.
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 male asparagus plant, substantially as herein shown and described, characterized particularly as to novelty by the unique combination of rust resistance (Puccinia asparagi), good field tolerance to root rot (Fusarium oxysporum) and crown rot (F. moniliforme), its ability to produce edible spears and to be combined with a female plant to produce hybrid seed which will produce plants having useful production characteristics.
Read the full patent: US Plant Patent PP4999 in full — the complete specification, every figure, and the file history.