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This is a list of special types of claims that may be found in a patent or patent application.For explanations about independent and dependent claims and about the different categories of claims, i.e. product or apparatus claims (claims referring to a physical entity), and process, method or use claims (claims referring to an activity), see Claim (patent), section "Basic types and categories".
In a patent or patent application, the claims define in technical terms the extent, i.e. the scope, of the protection conferred by a patent, or the protection sought in a patent application. In other words, the purpose of the claims is to define which subject-matter is protected by the patent (or sought to be protected by the patent application).
Under the new rules, if the claims as filed in a European patent application contain a plurality of independent claims in the same claim category and if the EPO considers in that case that the claims therefore do not comply with Rule 43(2) EPC, the EPO may "invite the applicant to indicate, within a period of two months, the claims complying ...
A patent application is a request pending at a patent office for the grant of a patent for an invention described in the patent specification [notes 1] and a set of one or more claims stated in a formal document, including necessary official forms and related correspondence. It is the combination of the document and its processing within the ...
Unlike utility patents, applications for design patents rely fully on the drawings. According to USPTO guidelines, "the drawing disclosure is the most important element of the application," and the drawings in design patent applications "constitute the entire visual disclosure of the claim."
Claim charts may also be used to support an argument that a patent claims ineligible subject matter, such as a law of nature or a conventional business practice. The left column of this type of chart is the same as that of the claim charts described above.