Plant
Kentucky bluegrass
14 US plant patents name this plant. 13 have expired, so those cultivars are free to propagate and sell. The next of the 1 still protected comes off patent on March 23, 2029.
Still under patent — 1 cultivar
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- B-5.0815PP21348Kentucky bluegrass plant named ‘B-5.0815’UNDER PATENTMarch 23, 2029
Already in the public domain — 13 cultivars
Most recently freed first. Anyone may propagate and sell these plants — though the name it is sold under may still be a live trademark.
- Ba81-227PP12435Kentucky bluegrass designated ‘Ba81-227’PUBLIC DOMAINNovember 26, 2020
- Ba75-173PP11987Kentucky bluegrass designated ‘Ba75-173’PUBLIC DOMAINMay 24, 2020
- Ba79-260PP11520Kentucky bluegrass designated `Ba79-260`PUBLIC DOMAINJuly 22, 2018
- Ba76-372PP11647Kentucky bluegrass designated `Ba76-372`PUBLIC DOMAINJuly 22, 2018
- Ba87-102PP11536Kentucky bluegrass designated `Ba87-102`PUBLIC DOMAINFebruary 27, 2018
- Ba 72-441 Kentucky bluegrassPP6585Kentucky bluegrassPUBLIC DOMAINMay 29, 2007
- Ba 72-492PP6537Kentucky bluegrass `Ba 72-492`PUBLIC DOMAINMarch 17, 2007
- BA 70-139PP6538Kentucky bluegrass--BA 70-139PUBLIC DOMAINMarch 17, 2007
- Ba 72-500 Kentucky bluegrassPP6280Kentucky bluegrassPUBLIC DOMAINSeptember 19, 2006
- Ba 61-91 Kentucky bluegrassPP6279Kentucky bluegrassPUBLIC DOMAINJune 10, 2006
- RugbyPP4465Kentucky bluegrass plantPUBLIC DOMAINJune 22, 1998
- Ba 62-55-MPP4336Kentucky bluegrassPUBLIC DOMAINDecember 27, 1997
- Kentucky bluegrassPP4223PUBLIC DOMAINMarch 14, 1995
Botanically this is Poa. A patent expiring frees the plant, and its cultivar name with it — cultivar names cannot be trademarked. Any brand name it is sold under is a separate thing and may still be owned.