US Plant Patent PP4704
Bluegrass
PUBLIC DOMAIN
Patent expired August 27, 1999. This plant is in the public domain — anyone may propagate and sell it.
No term adjustment or disclaimer is recorded against this patent, so this is the full statutory term — twenty years from the filing date.
The record
- Patent number
- PP4704
- Filed
- August 27, 1979
- Granted
- April 28, 1981
- Expires
- August 27, 1999
- Assignee
- WARREN S TURF NURSERY INC
- Inventor
- WARREN BENEDICT O
No cultivar name of record
This patent does not name the plant. Through the 1980s and early 1990s that was still common: naming every new cultivar only became standard practice as plants began to be marketed under brand names. The grant identifies this one by its number and by a written description instead.
Nothing here is missing from our records: the patent itself states no name. Where one exists we show it, and we do not invent one.
Abstract
A new and distinct variety of Kentucky Bluegrass (Poa pratensis L.) characterized by its excellent tolerance to drought, low fertilizer requirements, deep rooting system, excellent tolerance to Fusarium blight, and good to excellent shade tolerance. The plant tolerates a close cut, is highly resistant to most common bluegrass diseases, is extremely aggressive, has a medium to course leaf texture and consistently maintains excellent turf quality.
Show the legal claimThe single numbered claim as granted — the legal text that defines what this patent covers.
I claim: 1. The new and distinct variety of Bluegrass Plant herein described and illustrated and identified by the characteristics enumerated above.
Read the full patent: US Plant Patent PP4704 in full — the complete specification, every figure, and the file history.