I got a little different thought from reading the patent request. It looks like MS is trying to patent the process of using an external data store (be it a text file, database, etc..) that has admin account credentials in it that a differenet command (runas or something like that) could use so that you could run commands on the PC that you would normally not have rights to.
I know that by default, runas can not pass the account password to it in a batch file, only interactively, which makes it useless for installing patches and things in a script. This might make it easier (and of course more dangerous).
Maybe I'm just reading it wrong though....