In the continually evolving landscape of patent law, another continued evolution has occurred. The recent decision by the Supreme Court to decline a review of the case, Personalized Media Communications, LLC v. Apple Inc., indicates a further subtlety in the mechanics of patent disputes. This involves the concept of ‘prosecution laches’, which contributed to the Court’s decision.
In the aforementioned case, a divided panel of the Federal Circuit upheld the district court’s ruling that a PMC patent was unenforceable due to prosecution laches. This decision was taken after the district court found evidence of “an inequitable scheme to extend patent rights.”
Such an issue came to light in a convoluted manner involving 328 pre-GATT patent applications. This culminated in the patent at issue being granted 17 years after it was initially filed. The substantial time elapsed resulted in an expiration date at least forty years from its filing, an unusually long life-span for a patent when considering typical durations.
Prosecution laches is a defense typically invoked when the patent holder intentionally and unreasonably prolongs the prosecution process. It serves not only as a shield against infringement but also as a tool to discourage misuse of the patent system. While this doctrine of prosecution laches is infrequently applied, it adds another layer of defense to counterbalance potential patent system abuse.
This case has marked an important development in the practice of patent law. Legal professionals involved in patent disputes must now account for the possibility of prosecution laches coming into play, particularly when a significant delay is involved in the granting of the patent. An inequitable scheme to extend patent rights could undermine the enforceability of a patent, even if that patent would otherwise be valid. Thus, prosecution laches offers another aspect to consider in challenging or defending patents.