An Appeal to the New Patent Office Director: Repeal the Single Sentence Rule

Guest Post by Stephen Schott of Volpe & Koenig 

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Like all elementary school graduates, I learned that a single sentence should be short. One source suggests that a well-written work should average 20 to 25 word sentences.[1] With that as the guide, sentences averaging 50 words would raise the ire of a 3^rd grade teacher. Those averaging 100 words would drive a sane person mad. And a 250 plus word sentence would drive even Proust to distraction.

But sentences of such prodigious lengths are commonplace in patent law. The offending sentences are patent claims.[2] These claims are a U.S. patent’s most important feature. It is here that the inventor, or more likely the inventor’s attorney, sets forth the “metes and bounds” that define the invention. The claims serve as property lines: Cross into those lines with your product and you infringe the patent.

With such importance placed on claims, you would expect them to be quite readable. You would at least expect them to have been the subject of the “plain English” movement, perhaps best summed up by Albert Einstein when discussing science: “Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in language comprehensible to everyone.” But the claims—despite the substantial time spent drafting and interpreting them—are not a place where the discerning reader finds linguistic respite.