C2 Communications Patent Claims Rejected

Scott Daniels | October 4, 2010

In February we reported that two requests for reexamination had been granted against C2 Communications’ U.S. Patent No. 6,243,373 which claims a method for routing a call between two telephones over a public computer network, a so-called “voice-over-Internet protocol.”  The ‘373 patent has been the subject of a number of successful law suits, including cases against AT&T, Verizon and Qwest.  The PTO has now rejected all 24 claims of the ‘373 patent.

For the most part, the PTO adopted the rejections proposed in the requests: one set of rejections based on the request was filed by the “patent buster” Electronic Frontier Foundation, and three sets of rejections based on the request filed by PAETEC.

C2 Communications had sued PAETEC for infringement of the ‘373 patent, but the case was dismissed at the end of August, presumably on the basis of a settlement agreement.

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