November 9 does in fact appear to be the expiration date, that is, 20 years after the first filing date [1, 2].

The patent owner can still sue for damages for pre-expiration infringement, going back six years (which is the statute of limitations). But damages for infringement won't continue to accrue after expiration.

In addition, any injunction against infringement would expire automatically with the patent.

[1] http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sec...

[2] http://en.wikipedia.org/wiki/Term_of_patent_in_the_United_St...