Expiring push notifications automatically?

Hi,

I think the answer is no, and I've been researching to find out otherwise to no avail, but is there a way to expire banner notifications after a certain amount of time?

An example of this may be the score of the first half of a game, or an overnight weather alert. First half score is irrelevant to me a couple of hours later when the game is over.

So is there a way to have a banner which shows up as a notification expire and go away after x number of minutes without user intervention and ideally regardless of whether or not the app is currently running? If so where do I find the docs for it?