I wanted to see what other practitioners tend to do in the following situation:
Sometimes I file multiple related non-provisional applications on the same date. Each application lists the title of the related application, plus a placeholder for serial number ("12/xxx,xxx") in the "Cross reference to related applications" paragraph. The first application is filed without knowing what the serial number for the first application, the second application, etc is beforehand.
By the end of the date, you know what all the serial numbers are for all the now-filed applications. My usual practice is to file a same-day preliminary amendment that updates the "Cross reference to related applications" paragraph in each application to add actual serial numbers in place of the placeholder serial numbers, so the applications are now complete. Because this isn't new matter, I don't file new or supplementary declarations.
So my questions are if others tend to follow the same practice, not file the preliminary amendments, or file supplemental declarations that specifically list the preliminary amendment (just to be safe)?