What is the “practical application” test in patent eligibility?
The “practical application” test is part of Step 2A Prong Two of the patent eligibility analysis. It determines whether a claim that recites a judicial exception (abstract idea, law of nature, or natural phenomenon) integrates that exception into a practical application. If the claim integrates the exception into a practical application, it is not directed to the judicial exception and is eligible subject matter.
As stated in the MPEP:
“A claim that integrates a judicial exception into a practical application will apply, rely on, or use the judicial exception in a manner that imposes a meaningful limit on the judicial exception, such that the claim is more than a drafting effort designed to monopolize the judicial exception.”
The MPEP provides several considerations for evaluating practical application, including improvements to technology, implementing with a particular machine, and effecting a transformation of an article.
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