US Plant Patent PP17949
Don Frederico
Kalanchoe plant named ‘Don Frederico’
PUBLIC DOMAIN
Patent expired January 18, 2026. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on October 26, 2025. This patent earned 84 days of term adjustment for delay at the Patent Office, which is why it runs longer.

The record
- Patent number
- PP17949
- Filed
- October 26, 2005
- Granted
- August 28, 2007
- Expires
- January 18, 2026
- Assignee
- KNAAP LICENTIES B V
- Inventor
- VAN DER KNAAP LEONARDUS JOHANN
Abstract
A new and distinct cultivar of Kalanchoe plant named ‘Don Frederico’, characterized by its upright and freely branching plant habit; dark green-colored leaves; yellow-colored double flowers with multiple petals per flower; and excellent postproduction longevity.
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 Kalanchoe plant named ‘Don Frederico’, as illustrated and described.
Read the full patent: US Plant Patent PP17949 in full — the complete specification, every figure, and the file history.