file wrapper estoppel

Definition of "file wrapper estoppel"
  1. A term used in patent law that restricts an applicant from claiming that a more narrowly defined claim aligns with a previously rejected, broader claim. This rule, sometimes referred to as prosecution history estoppel, prevents the manipulation of patent claims
How to use "file wrapper estoppel" in a sentence
  1. Due to the principle of file wrapper estoppel, the inventor could not argue that his refined claim was identical to the previously dismissed, broader claim.
  2. File wrapper estoppel was invoked to prevent the patentee from expanding the scope of his accepted claim to match a previously discarded generalized one.
  3. The patent office applied file wrapper estoppel, inhibiting the applicant from equating the narrowed claim with the earlier repudiated expansive one.

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