US Plant Patent PP18324

Cinnabar Silver

Heuchera plant named ‘Cinnabar Silver’

PUBLIC DOMAIN

Patent expired July 16, 2026. This plant is in the public domain — anyone may propagate and sell it.

Twenty years from the filing date would end on June 23, 2026. This patent earned 23 days of term adjustment for delay at the Patent Office, which is why it runs longer.

Figure 1 of US plant patent PP18324, the photograph of Cinnabar Silver printed in the patent. — Figure 1 from US Plant Patent PP18324, 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: PP18324
Filed: June 23, 2006
Granted: December 18, 2007
Expires: July 16, 2026
Assignee: TERRA NOVA NURSERIES INC
Inventor: EGGER JANET N

Abstract

A new and distinct hybrid of Heuchera plant characterized by medium sized, dark leaves with heavy silver veiling; brick red colored flowers; compact, mounding habit; excellent vigor.

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

1. A new and distinct hybrid of Heuchera plant as herein illustrated and described.

Read the full patent: US Plant Patent PP18324 in full — the complete specification, every figure, and the file history.