You might also refer to this one as the "pop-under window" in a web browser. You know when you click the "X" button to close a browser, and you get a little window (usually an ad)? There's a patent for that:
"Upon query (or other interaction) by the browser prior to closing page, the traffic control program interacts with the browser software to modify or control one or more of the browser functions, such that the user computer is further directed to a predesignated site or page (and displays a predesignated frame) upon execution of a browser function, instead of accessing the site or page typically associated with the selected browser function."
Issued May 14 2002, so won't expire until 2022.