Dangers Of Means Plus Function Limitations In US Patent Prosecution 19/07/2018 by Intellectual Property Watch 1 Comment Broad patent protection is one of the goals when securing patent protection for inventions (i.e., new products and services). However, issues start to arise when the claim language becomes too broad. For example, broad claims might be construed as a means plus function limitation against the intentions of the patent prosecutor, and in some cases, those patents are invalidated as being indefinite. At least, this is the case with US patent prosecution. The patent laws of other jurisdictions treat means plus function style of claiming differently, and in my experience, less detrimental to the validity of the patent, writes James Yang.