Where does “antipatent” come from?

antipatent (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.

antipatent (English): Opposing patents or the nature of current patent...

Definitions

  1. Opposing patents or the nature of current patent...

Ancestry of “antipatent”, step by step

antipatent 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 anti

StepLanguageWordMeaning
1EnglishantiOpposed to something; That has a torsion angle...
2Englishanti-Against, hostile to; Contrasting with the norm;...
3Ancient Greekἀντι-anti-, against; like, reminiscent of
4Ancient Greekᾰ̓ντῐ́opposite
Every word from Proto-Indo-European peth₂-Every word from Latin pateōEvery word from Latin patēns