prosecution history estoppel
C2CEFR level
95/100Rarity: very rare
TechnicalRegister
The bar preventing a patentee from reclaiming, via equivalents, subject matter surrendered by amendment or argument during examination.
They narrowed that claim to clear the prior art, so prosecution history estoppel now caps how far it can stretch.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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