The front page of Annex 1
The front page may reveal interesting information:
- the proprietor: is there another annex of the same proprietor, be extra alert for 'first application' issues
- priority country: WTO state and Annex 1 is a Euro-PCT, check the transitional provisions
- priority claimed from a US continuation: invalid, it can never be the first application;
from a US continuation in part - only valid for the later added matter - warning that claims have been added after filing (it must thus be under EPC2000): all claims must be examined also for added subject-matter
- a B1 publication: if the client indicates that a central limitation has taken place (and what) be aware that you must attack the limited claims and not the claims of the B1 publication