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Pfizer Vaccine Patent Strikes Out Again at Patent Board

June 4, 2019, 7:55 PM

A Pfizer Inc. antibacterial vaccine patent sustained another loss at the U.S. Patent and Trademark Office, this time in a challenge brought by Sanofi Pasteur Inc. and South Korean company SK Chemicals Co. LTD.

The PTO’s Patent Trial and Appeal Board June 3 found all 45 claims of U.S. Patent No. 9,492,559 unpatentable as obvious in light of prior art. The decision came in an inter partes review, a procedure in which the patentability of a patent’s claims are considered based on prior patents or printed publications.

The decision is the PTAB’s latest involving the patentability of claims in the...

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