Plant
Sweetpotato
54 US plant patents name this plant. 13 have expired, so those cultivars are free to propagate and sell. The next of the 41 still protected comes off patent on July 25, 2027.
Still under patent — 41 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- EvangelinePP19710Sweetpotato plant named ‘Evangeline’UNDER PATENTJuly 25, 2027
- Murasaki-29PP19955Sweetpotato plant named ‘Murasaki-29’UNDER PATENTOctober 18, 2027
- NCORNSP-011MNLCPP21743Sweetpotato plant named ‘NCORNSP-011MNLC’UNDER PATENTNovember 9, 2029
- NCORNSP-012EMLCPP21744Sweetpotato plant named ‘NCORNSP-012EMLC’UNDER PATENTNovember 9, 2029
- BonitaPP22719Sweetpotato plant named ‘Bonita’UNDER PATENTOctober 4, 2030
- NCORNSP-013GNLCPP23612Sweetpotato plant named ‘NCORNSP-013GNLC’UNDER PATENTApril 26, 2031
- NCORNSP-015SCPIPP23613Sweetpotato plant named ‘NCORNSP-015SCPI’UNDER PATENTApril 27, 2031
- NCORNSP-014BWPIPP23651Sweetpotato plant named ‘NCORNSP-014BWPI’UNDER PATENTApril 28, 2031
- 05-111PP23761Sweetpotato plant named ‘05-111’UNDER PATENTNovember 22, 2031
- 07-146PP23785Sweetpotato plant named ‘07-146’UNDER PATENTNovember 22, 2031
- CX-1PP27197Sweetpotato plant named ‘CX-1’UNDER PATENTDecember 5, 2031
- LA04-175PP25308Sweetpotato plant named ‘LA04-175’UNDER PATENTMay 14, 2033
- LA06-52PP26735Sweetpotato plant named ‘LA06-52’UNDER PATENTSeptember 13, 2034
- NCORNSP-019SCSHLMPP28318Sweetpotato plant named ‘NCORNSP-019SCSHLM’UNDER PATENTNovember 19, 2035
- V12B.445PP29941Sweetpotato plant named ‘V12B.445’UNDER PATENTDecember 28, 2036
- NCORNSP-020BWGWEPP29803Sweetpotato plant named ‘NCORNSP-020BWGWE’UNDER PATENTDecember 29, 2036
- NCORNSP-023BWAMPP29858Sweetpotato plant named ‘NCORNSP-023BWAM’UNDER PATENTDecember 29, 2036
- NCORNSP-021SHJBPP29378Sweetpotato plant named ‘NCORNSP-021SHJB’UNDER PATENTDecember 30, 2036
- NC05-198PP29942Sweetpotato plant named ‘NC05-198’UNDER PATENTApril 14, 2037
- LA17-120PP31968Sweetpotato plant named ‘LA17-120’UNDER PATENTFebruary 8, 2039
- LA17-40PP31969Sweetpotato plant named ‘LA17-40’UNDER PATENTFebruary 8, 2039
- LA08-21PPP31970Sweetpotato plant named ‘LA08-21P’UNDER PATENTFebruary 8, 2039
- LA15-527PP32002Sweetpotato plant named ‘LA15-527’UNDER PATENTFebruary 8, 2039
- LA17-54PP32003Sweetpotato plant named ‘LA17-54’UNDER PATENTFebruary 8, 2039
- LA17-31PP32020Sweetpotato plant named ‘LA17-31’UNDER PATENTFebruary 8, 2039
- LA13-81PP32021Sweetpotato plant named ‘LA13-81’UNDER PATENTFebruary 8, 2039
- NCORNSP-024SCRIPP31837Sweetpotato plant named ‘NCORNSP-024SCRI’UNDER PATENTMarch 8, 2039
- NCORNSP-025SCKPP31855Sweetpotato plant named ‘NCORNSP-025SCK’UNDER PATENTMarch 8, 2039
- Charleston-163PP32142Sweetpotato plant named ‘Charleston-163’UNDER PATENTSeptember 3, 2039
- NCORNSP-027SCMGPP34146Sweetpotato plant named ‘NCORNSP-027SCMG’UNDER PATENTApril 30, 2041
- NCPUR13-0315PP34093Sweetpotato plant named ‘NCPUR13-0315’UNDER PATENTJuly 15, 2041
- NC04-0531PP34125Sweetpotato plant named ‘NC04-0531’UNDER PATENTJuly 15, 2041
- NCPUR13-0030PP34126Sweetpotato plant named ‘NCPUR13-0030’UNDER PATENTJuly 15, 2041
- NCORNSP-030ILPLPP35096Sweetpotato plant named ‘NCORNSP-030ILPL’UNDER PATENTNovember 15, 2042
- NCORNSP-029SCBCPP35148Sweetpotato vine named ‘NCORNSP-029SCBC’UNDER PATENTNovember 15, 2042
- NCORNSP-028SCKLPP35702Sweetpotato plant named ‘NCORNSP-028SCKL’UNDER PATENTNovember 15, 2042
- NCORNSP-031SHMGPP36237Sweetpotato plant named ‘NCORNSP-031SHMG’UNDER PATENTJanuary 24, 2044
- NCORNSP-032SCRHIPP36238Sweetpotato plant named ‘NCORNSP-032SCRHI’UNDER PATENTJanuary 24, 2044
- LA18-100PP36736Sweetpotato plant named ‘LA18-100’UNDER PATENTMay 8, 2044
- NCORNSP-033SCMPPP36978Sweetpotato plant named ‘NCORNSP-033SCMP’UNDER PATENTMarch 28, 2045
- NCORNSP-034SCVPGPP37109Sweetpotato plant named ‘NCORNSP-034SCVPG’UNDER PATENTMarch 28, 2045
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.
- Sweet Caroline Sweetheart RedPP19013Ornamental sweetpotato plant named ‘Sweet Caroline Sweetheart Red’PUBLIC DOMAINJuly 10, 2026
- CovingtonPP18516Sweetpotato plant named ‘Covington’PUBLIC DOMAINMay 9, 2026
- Sweet Caroline Sweetheart Light GreenPP18572Ornamental sweetpotato plant named ‘Sweet Caroline Sweetheart Light Green’PUBLIC DOMAINMarch 31, 2026
- Sweet Caroline Sweetheart PurplePP18573Ornamental sweetpotato plant named ‘Sweet Caroline Sweetheart Purple’PUBLIC DOMAINMarch 31, 2026
- Sweet Caroline Bewitched PurplePP18574Ornamental sweetpotato plant named ‘Sweet Caroline Bewitched Purple’PUBLIC DOMAINMarch 31, 2026
- Sweet Caroline Green YellowPP18673Ornamental sweetpotato plant named ‘Sweet Caroline Green Yellow’PUBLIC DOMAINMarch 31, 2026
- Stokes purplePP17976Sweetpotato plant named ‘Stokes purple’PUBLIC DOMAINDecember 17, 2025
- Sweet Caroline RedPP17483Ornamental sweetpotato plant named ‘Sweet Caroline Red’PUBLIC DOMAINDecember 28, 2024
- Sweet Caroline BronzePP15437Ornamental sweetpotato plant named ‘Sweet Caroline Bronze’PUBLIC DOMAINApril 29, 2022
- Sweet Caroline PurplePP14912Ornamental sweetpotato plant named ‘Sweet Caroline Purple’PUBLIC DOMAINApril 2, 2022
- Sweet Caroline Light GreenPP15028Ornamental sweetpotato plant named ‘Sweet Caroline Light Green’PUBLIC DOMAINApril 2, 2022
- Sweet Caroline GreenPP15056Ornamental sweetpotato plant named ‘Sweet Caroline Green’PUBLIC DOMAINApril 2, 2022
- L96-117PP15038Sweetpotato plant named ‘L96-117’PUBLIC DOMAINMarch 5, 2022
Botanically this is Ipomoea. 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.