If the application suggests that the use of terms such as "about", "approximately" or "substantially" extends either the interval claimed by a value and/or range outside the error margins of the measurement system or the structural unit beyond the manufacturing tolerances, , however, the use of such a word suggests that deviations are included which are larger than those accepted tolerances, then the wording becomes vague and undefined, i.e. the application does not fulfil the requirements of Art. 84, because. In any case, the word can only be permitted if its presence does not preventprevents the invention from being unambiguously distinguished from the prior art with respect to novelty and inventive step.
For example, if the application suggests that an icosagon (20-sided polygon) is also a "substantially circular circumference" for a metal tray realised by a CNC waterjet cutting machine, this renders the scope of the claims unclear because: