United States Postal Service Interruption and Emergency under 35 U.S.C. 21(a) (July 2, 2013)United States Postal Service Interruption and Emergency under 35 U.S.C. 21(a) (May 28, 2013)Closing of the United States Patent and Trademark Office on Wednesday, March 6, 2013 (May 7, 2013)