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The Patent Garden

US Plant Patent PP12771

Non-dwarfing pear rootstock named "Rhenus 3'

PUBLIC DOMAIN

Patent expired January 29, 2019. 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.

Figure 4 of US plant patent PP12771, the photograph of Non-dwarfing pear rootstock named "Rhenus 3' printed in the patent.
Figure 4 from US Plant Patent PP12771, reproduced as printed. Photographs in a plant patent are taken by the applicant. Reproduction of the patent document is permitted; the image is shown whole and uncropped for that reason.

The record

Patent number
PP12771
Filed
January 29, 1999
Granted
July 16, 2002
Expires
January 29, 2019
Inventor
JACOB HELMET B

No cultivar name of record

This patent does not name the plant, which is unusual for its date — by the mid-1990s nearly every plant patent carried a cultivar name. 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 variety of Pyrus communis named "Rhenus 3' that is compatible as a rootstock with all pear varieties tested and when used as a rootstock for pear varieties, does not cause significant dwarfing. When used as a rootstock, "Rhenus 3' results in high yield efficiency, early yield (precocity), substantially uniform fruit size, high frost hardiness, no suckering, and good soil adaptation.

Read the full patent: US Plant Patent PP12771 in full — the complete specification, every figure, and the file history.