US Plant Patent PP4165
WK 411 bluegrass
Bluegrass plant
PUBLIC DOMAIN
Patent expired December 13, 1994. This plant is in the public domain — anyone may propagate and sell it.
Twenty years from the filing date would end on October 29, 1996, but this patent ends 686 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
- PP4165
- Filed
- October 29, 1976
- Granted
- December 13, 1977
- Expires
- December 13, 1994
- Assignee
- WEIBULL AB W
- Inventor
- LANGVAD BJARNE JOHAN
Abstract
A Kentucky bluegrass plant which exhibits an attractive dark green color, rather narrow leaves and low rhizomatous growth habit and high density of shoots. It has a very large seed size and shows good resistance to Helminthosporium leaf spot, Mildew and Stripe smut diseases.
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 Kentucky bluegrass plant, substantially as described and illustrated, characterized particularly by very good turf performance, very attractive dark green color, good rhizome and tiller development, very large seed and good resistance to leaf spot and stripe smut.
Read the full patent: US Plant Patent PP4165 in full — the complete specification, every figure, and the file history.