Patent and Trademark Office Estimates It Can Run 4 Weeks During Shutdown

From the U.S. Patent and Trademark's website:

During the general government shutdown that began October 1, 2013, the United States Patent and Trademark Office will remain open, using prior year reserve fee collections to operate as usual for approximately four weeks. We continue to assess our fee collections compared to our operating requirements to determine how long we will be able to operate in this capacity during a general government shutdown. We will provide an update as more definitive information becomes available.

You can read the full post here.