We often write about the benefits of the new bilateral conventions called Patent Prosecution Highway (PPHs). A while ago, we suggested filing a patent application in Europe or in the UK first, and when the application is allowed, filing in the US and requesting accelerated examination (“petition to make special”) based on the PPH.
One of the downsides of the PPH is that it forces the applicant to submit a practically identical (“corresponding”) set of claims in the US, once the UK or the European patent is allowed. If the applicant narrowed its claims during prosecution in the UK or Europe, he may wish to refrain from filing a PPH merely to keep the scope of the US application more broad.
One should consider that this is not exactly the case, and this pitfall can be avoided in the US by using the continuation practice. One can file a US application, and indeed file it with a set of claims corresponding to the allowed set of claims in Europe or the UK. At the same time, it is possible to file a new, broader, set of claims in a continuation application. If the first application reaches examination it is likely that the continuation application be examined as well, and by the same examiner.
Such a strategy will allow an applicant for a patent in the US to enjoy the benefits of the PPH, and at the same time, refrain from limiting the scope of the application.