Which of the following statements is true regarding PPH eligibility?

The correct answer is based on the requirements set forth for Patent Prosecution Highway (PPH) eligibility. In the context of PPH, one crucial eligibility criterion is that all claims in the U.S. application must be linked to an allowed claim from a corresponding application in an associated PPH partner office.

This means that the claims being presented in the U.S. application should correspond to and be derived from claims that have been allowed in a previously examined application (for example, in a foreign patent office). The rationale for this requirement is to streamline the patent examination process, leveraging the prior work done by another patent office, thereby promoting efficiency.

When evaluating other statements, the first option is incorrect because a U.S. application can have claims—it is not a requirement to have none. The second statement is also incorrect since the corresponding application does not need to be in a non-English language; it could be in English or another language depending on the policies of the specific patent office involved. Lastly, the fourth option is misleading because the timing of the filing of the U.S. application isn't necessarily restricted to after the international application. PPH eligibility is based more on the allowed claims rather than the specific filing timeline.

Understanding these nuances helps clarify the requirements for