IPNITE PATENT GUIDE
How Patent Claims Work
The claims are the legal boundary of a patent. The description explains the invention; the claims decide what others cannot do without your permission.
IPniteAnatomy of a claim
A claim is a single sentence with three parts: a preamble that names the invention ("A device for…"), a transitional phrase, and the body that lists the elements and how they relate. Every element in a claim limits it: the more elements, the narrower the protection.
Open and closed transitions
"Comprising" is open: a product with extra elements still falls within the claim. "Consisting of" is closed: extra elements usually take a product outside it. The choice changes the scope significantly.
Independent and dependent claims
An independent claim stands on its own and defines the broadest version of the invention you can justify over the prior art. Dependent claims refer to an earlier claim and add features. If the independent claim is rejected or invalidated, dependent claims provide fallback positions.
Support and clarity
Every claim must be supported by the description and use terms with a clear antecedent basis ("a sensor" first, then "the sensor"). Claims broader than what the description supports are a frequent reason for rejection.
Claim counts and fees
Many offices charge extra for claims above a threshold. In the United States, fees apply above three independent and twenty total claims, so a claim set should be deliberate rather than long.
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