Nursery or breeding house
PURDUE RESEARCH FOUNDATION
30 US plant patents, granted between 1976 and 2009.
Filed under the PURDU name. Related entities are listed separately on the PURDU search, because a company and a person are not the same filer even when the name matches.
Still under patent — 1 cultivar
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Co-op 31PP20437Apple tree named ‘Co-op 31’UNDER PATENTApril 11, 2028
Already in the public domain — 29 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.
- Curly PoplarPP17525Poplar tree named ‘Curly Poplar’PUBLIC DOMAINApril 22, 2025
- H2-169PP16759Pear tree named ‘H2-169’PUBLIC DOMAINMarch 1, 2025
- CO-OP 39PP16622Apple tree named ‘CO-OP 39’PUBLIC DOMAINFebruary 1, 2025
- Co-op 29PP13819Apple tree named ‘Co-op 29’PUBLIC DOMAINDecember 21, 2021
- Co-op 33PP13871Apple tree named ‘Co-op 33’PUBLIC DOMAINDecember 21, 2021
- P448-2PP14034Pear tree named ‘P448-2’PUBLIC DOMAINDecember 21, 2021
- Co-op 32PP9881Apple tree `Co-op 32`PUBLIC DOMAINAugust 19, 2014
- Co-Op 30PP9193Apple tree named Co-Op 30`PUBLIC DOMAINJune 2, 2013
- Co-op 38PP9392Apple tree `Co-op 38`PUBLIC DOMAINJune 2, 2013
- COOP 23PP6268Apple tree `COOP 23`PUBLIC DOMAINApril 25, 2006
- Apple treePP5584PUBLIC DOMAINJanuary 23, 2004
- Distinct variety of black walnut treePP4954PUBLIC DOMAINApril 16, 2001
- Distinct variety of black walnut treePP4955PUBLIC DOMAINApril 16, 2001
- Black walnut treePP4964PUBLIC DOMAINApril 16, 2001
- Black walnut treePP4966PUBLIC DOMAINApril 16, 2001
- Black walnut treePP4968PUBLIC DOMAINApril 16, 2001
- Black walnut treePP4971PUBLIC DOMAINApril 16, 2001
- Coop 22PP4633PUBLIC DOMAINAugust 29, 1999
- Distinct cultivar of apple tree: COOP 16PP4499PUBLIC DOMAINNovember 6, 1998
- Distinct variety of black walnut treePP4542PUBLIC DOMAINSeptember 5, 1998
- Distinct variety of black walnut treePP4543PUBLIC DOMAINSeptember 5, 1998
- Distinct variety of black walnut treePP4614PUBLIC DOMAINSeptember 5, 1998
- Distinct variety of bluegrass plantPP4453PUBLIC DOMAINMay 15, 1998
- HoneysweetPP4379Honeysweet pear treePUBLIC DOMAINJanuary 3, 1998
- Coop 14PP4320Apple tree (Coop 14)PUBLIC DOMAINAugust 4, 1997
- Coop 10PP4321Apple tree (Coop 10)PUBLIC DOMAINAugust 4, 1997
- Coop 13PP4322Apple tree (Coop 13)PUBLIC DOMAINAugust 4, 1997
- Coop 12PP4359Apple tree (Coop 12)PUBLIC DOMAINAugust 4, 1997
- Sir PrizePP3988Apple tree: Sir PrizePUBLIC DOMAINDecember 14, 1993