Law Commons^™

The Infringement Continuum, Bernard Chao

Sturm College of Law: Faculty Scholarship

For many years, patent law has struggled with the issue of permissible claim scope. A patent’s specification and its claims often suffer from a surprising disconnect. The specification generally describes an invention in terms of one or more specific implementations, suggesting a relatively narrow invention. But claims are drafted far more broadly. They frequently encompass unforeseen variations and even cover after-arising technology.

Although there are numerous existing doctrines that try to prevent claims from straying too far from their specification, these doctrines offer binary outcomes ill suited for patent law. Under these doctrines, as a claim encompasses subject matter further …