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Chapter IV – Claims (Art. 6 and formal requirements)

Home
Legal texts
PCT-EPO Guidelines
Table of Contents
PCT Part F
Chapter IV
4. Clarity and interpretation of claims

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4. Clarity and interpretation of claims

Overview

4. Clarity and interpretation of claims

A revised version of this publication entered into force, see here

4.1 Clarity

4.2 Interpretation

4.3 Inconsistencies

4.4 General statements, "spirit" of invention

4.5 Essential features

4.6 Relative terms

4.7 Terms like "about", "approximately" and "substantially"

4.8 Trademarks

4.9 Optional features

4.10 Result to be achieved

4.11 Parameters

4.12 Product-by-process claim

4.13 Interpretation of expressions stating a purpose

4.14 Definition by reference to use or another entity

4.15 The expression "in"

4.16 Use claims

4.17 References to the description or drawings

4.18 Reference signs

4.19 Negative limitations (e.g. disclaimers)

4.20 "Comprising" vs. "consisting"

4.21 Functional definition of a pathological condition

4.22 Broad claims

4.23 Order of claims

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