US Plant Patent PP18727

Taipei Silk

Tricyrtis plant named ‘Taipei Silk’

PUBLIC DOMAIN

Patent expired September 3, 2026. This plant is in the public domain — anyone may propagate and sell it.

Twenty years from the filing date would end on December 31, 2025. This patent earned 246 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP18727, the photograph of Taipei Silk printed in the patent. — Figure 1 from US Plant Patent PP18727, 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: PP18727
Filed: December 31, 2005
Granted: April 15, 2008
Expires: September 3, 2026
Assignee: PROBST DARRELL R
Inventor: PROBST DARRELL R

Abstract

A new and distinct cultivar of Tricyrtis plant named ‘Taipei Silk’, characterized by its upright and outwardly spreading plant habit; freely branching growth habit; glossy dark green-colored foliage; large inflorescences with numerous purple and white-colored flowers; and winter hardy to USDA Zone 6.

Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.

1. A new and distinct cultivar of Tricyrtis plant named ‘Taipei Silk’, as illustrated and described.

Read the full patent: US Plant Patent PP18727 in full — the complete specification, every figure, and the file history.