Where does “unpatent” come from?

unpatent (English) comes from English patent, from Middle English patent, from Middle French patent, from Old French patent, from Latin patēns, from Latin pateō, from Proto-Indo-European peth₂- — to spread out; to fly.

unpatent (English): To release from a legal patent

Definitions

  1. To release from a legal patent

Ancestry of “unpatent”, step by step

unpatent traces back through two separate lines of ancestry.

via English patent

StepLanguageWordMeaning
1EnglishpatentA declaration issued by a government agency...
2Middle EnglishpatentA letter conferring a privilege or status; Such a...
3Middle Frenchpatent
4Old Frenchpatent
5Latinpatēnsbeing opening; open
6Latinpateōto be open, accessible, attainable
7Proto-Indo-Europeanpeth₂-to spread out; to fly

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European peth₂-Every word from Latin pateōEvery word from Latin patēns