US Plant Patent PP4220
Yellow Frost
Chrysanthemum plant
PUBLIC DOMAIN
Patent expired March 7, 1995. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on March 24, 1997, but this patent ends 748 days earlier — a terminal disclaimer gives term back. A source that calculates twenty years from filing would tell you this plant is still protected when it is already free.
The record
- Patent number
- PP4220
- Filed
- March 24, 1977
- Granted
- March 7, 1978
- Expires
- March 7, 1995
- Assignee
- YODER BROTHERS INC
- Inventor
- JESSEL JR WALTER H; DUFFETT WILLIAM E
Abstract
An induced mutation of Frost characterized by its yellow ray florets.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
We claim: 1. A new and distinct cultivar of Chrysanthemum morifolium Ramat, known by the cultivar name Yellow Frost and particularly characterized as to uniqueness by the combined characteristics of spoon daisy capitulum type; flat capitulum form; medium yellow ray floret color; yellow green (immature) to yellow (mature) disc floret color; diameter across face of capitulum from 80 to 95 mm. at maturity; uniform nine week flowering response to photoperiodic short-day control; medium plant height; semi-spreading branching pattern; and minimal pollen development.
Read the full patent: US Plant Patent PP4220 in full — the complete specification, every figure, and the file history.