Definition
Patent eligibility is the threshold question of whether an invention falls within the categories that patent law allows, excluding abstract ideas, natural phenomena, and laws of nature.
Why It Matters Legally
Eligibility has become a major battleground, especially for software and biotech, where many patents are challenged as abstract ideas. Failing this test ends the inquiry regardless of how novel the invention is.
Example Use Case
A software patent claiming a basic method of organizing data is invalidated as an abstract idea, even though the specific implementation was new.
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Related Terms
Patentability, Abstract Idea, Subject Matter, Patent Validity, Software Patent