Scott Daniels | August 31, 2009
The PTO granted ex parte reexamination of all four claims of U.S. Patent No. 6,074,503 owned by Belden CDT of Canada. The PTO found that a substantial new question of patentability was raised by each of four prior art references, as well as by various combinations of references.
The request was filed by Superior Essex. This is one of a series of reexamination requests filed by Superior against Belden patents. For a description of the dispute in the PTO and in District Court between Superior and Belden, see our article of July 8, 2009.