US Plant Patent PP4504
Dieffenbachia plant
PUBLIC DOMAIN
Patent expired August 31, 1998. 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
- PP4504
- Filed
- August 31, 1978
- Granted
- February 19, 1980
- Expires
- August 31, 1998
- Inventor
- WELKER RICHARD P
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 plant variety of the Arum Family has a growth habit providing specimens which exhibit a compact growth habit with frequent tillering, leaf blades having a mottled generally achlorophyllous center field that is extensive by comparison to those of the `Perfection` and `Exotica` varieties and provided with achlorophyllous streaks that follow the pattern of the lateral secondary veins, and with chlorophyllous blotches and flecks that include colors found in a narrow border area surrounding the center field. The petioles of the leaf have a basal sheathing portion with a distal termination that characteristically is located closer to the leaf blade than to the petiole insertion at blade maturity.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. The new and distinct variety of the Arum Family, substantially as herein shown and described.
Read the full patent: US Plant Patent PP4504 in full — the complete specification, every figure, and the file history.