Why must the claims in the U.S. application correspond with the "allowed" application?

The reason claims in a U.S. application must correspond with the "allowed" application is primarily related to the need for consistency and clarity in the patenting process. When claims are drafted and submitted in a patent application, it's important that any claims that are eventually allowed or granted correlate properly with those in the application to avoid redundancy in patenting. This ensures that the same invention is not covered by multiple patents, which could lead to confusion and inconsistent protection for the inventor.

While other factors are important in the examination of patent applications, such as complying with novelty requirements or facilitating the examination process, these are more about the efficiency and validity of the application rather than the need for correspondence with the allowed claims specifically. Similarly, while international patent laws have their own requirements, they do not dictate the need for claims correspondence within the U.S. patent framework. Thus, avoiding redundancy is the core reason for the necessity of claims to correspond with the allowed application.