Checking whether the specification together with the drawings is likely to satisfy the basic prerequisites for the granting of a patent. For example, in the case of US utility patent applications filed at the USPTO, checking whether the invention described is novel, useful, non-obvious compared to the prior art, "enabled" and fully disclosed. This typically involves directly making changes in the draft specification where such changes are obviously required; and also querying the inventor as to aspects of the invention/draft that need clarification, expansion, correction, or even omission. Full disclosure is critical at the time of filing the patent application, because attempts to make additions after that are usually refused on the ground of "new matter." At the USPTO, full and comprehensive claiming of the invention is very important at the time of filing a nonprovisional patent application, because after they assess the application, they typically only give you one chance to adjust the claiming to define an invention that meets all the criteria for patentability.