481. Identification of the inventive concept.

The inventive concept is not some generalised concept to be derived from the specification as a whole but the inventive concept of the claim in question1. The first stage is likely to be a question of construction to ascertain the meaning of the claim. The second stage is to identify the essence of the claim by distinguishing between the portions of the claim which matter and those portions which, although limitations on the ambit of the claim, do not2. The identification of the inventive concept requires a consideration of what the invention is3. The invention may be the idea