US Plant Patent PP13729
Crimson Curls
Heuchera plant named ‘Crimson Curls’
PUBLIC DOMAIN
Patent expired January 24, 2021. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on December 2, 2020. This patent earned 53 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP13729
- Filed
- December 2, 2000
- Granted
- April 15, 2003
- Expires
- January 24, 2021
- Inventor
- BROWN RAY
Abstract
A new cultivar of Heuchera named ‘Crimson Curls’ that is characterized by a dense, clumping habit and dark purple-brown and crimson leaves with densely curled edges, setting ‘Crimson Curls’ apart from all other existing varieties of Heuchera known to the inventor.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
What is claimed is: 1. A new and distinct variety of Heuchera plant named ‘Crimson Curls’ as described and illustrated.
Read the full patent: US Plant Patent PP13729 in full — the complete specification, every figure, and the file history.