finding files only minutes old?

I have files that are being created in a directory constantly.
I want to be able write a script that would check this directory every 15 minutes and copy only the files that were newer than the files that were copied the previous 15 minutes. On linux, I found this to be as easy as running the find command; however, I am trying to do this on a old sco unix machine. The version of find on the old sco machine is not capable of finding files only minutes old. Any help would be greatly appreciated. Thank you.

This actually is a faq, but it wasn't in our faq on the find command. I just corrected that. So see: advanced/complex uses of the find command

Perderabo,

Thank you. I was able to write a short script to perform the task I needed with the info form the faq link.