What type of rejections can be presented upon appeal according to the Board?

The correct choice is based on the guidelines governing appeals in patent prosecution. When a patent application is appealed to the Board of Patent Appeals and Interferences, the Board allows for the introduction of new grounds for rejection in the examiner's answer. This means that the examiner has the opportunity to present rejections that might not have been included in the initial examination process.

This flexibility is essential for ensuring that all relevant information and considerations are taken into account during the appeal process. New grounds for rejection can provide the applicant with insights into additional aspects of patentability that may not have been fully addressed earlier. This allows for a more thorough examination of the application.

While it is true that the Board mainly reviews rejections that were made in the initial filing, it is also critical to understand that the introduction of new grounds during the examiner's answer is a procedural feature meant to uphold the integrity of the examination process. It ensures that any pertinent information that arises during the appeal can be discussed and addressed.

In contrast, the other choices suggest limitations that do not align with the board's practices. The option stating that only those rejections presented in the initial filing can be appealed overlooks the potential for new arguments to be made. Similarly, implying that all rejections regardless of type