How can an applicant resolve ambiguities in functional limitations?
The MPEP provides several ways an applicant can resolve ambiguities in functional limitations during prosecution:
- Use a quantitative metric instead of a qualitative functional feature. For example, include a numeric limitation for a physical property.
- Demonstrate that the specification provides a formula for calculating a property, along with examples that meet and do not meet the claim limitation.
- Show that the specification offers a general guideline and sufficient examples to teach a person skilled in the art when the claim limitation is satisfied.
- Amend the claims to recite the particular structure that accomplishes the function.
As stated in the MPEP, “During prosecution, applicant may resolve the ambiguities of a functional limitation in a number of ways.” The goal is to provide clarity and definiteness to the claim language while maintaining the intended scope of the invention.
To learn more:
Topics:
MPEP 2100 - Patentability,
MPEP 2173.05(G) - Functional Limitations,
Patent Law,
Patent Procedure