Practice question: means-plus-function claims
Answer in brief
This question tests the scope of a claim limitation written under 35 U.S.C. 112(f). Pick an answer before you open the explanation; the governing rule is in MPEP 2181.
An original practice question written by Wysebridge in the style of the exam. It is not a released USPTO question.
The question
Claim 1 recites "means for securing the lid to the container." The specification describes a threaded collar as the structure that secures the lid. How is the limitation construed?
- To cover any structure capable of securing a lid.
- To cover the threaded collar described in the specification and its equivalents.
- As indefinite, because means-plus-function language is not permitted.
- To cover only the exact threaded collar, with no equivalents.
- As a method step rather than a structural element.
Answer and explanation
Show the answer
Answer: B. A means-plus-function limitation is construed to cover the corresponding structure, material or acts described in the specification and equivalents thereof. It does not cover every structure that performs the function, and such claims are expressly permitted by 35 U.S.C. 112(f).
Where the rule lives
Read MPEP 2181 explained on MPEP.net, then find it in the official MPEP. On test day you will search the same text, so practice locating it yourself.
Sources for this entry
- Manual of Patent Examining Procedure (MPEP) USPTO
The examination manual the patent bar is tested on; open book during the exam. - Wysebridge — Patent bar exam simulator Wysebridge (publisher of this site)
Timed AM/PM practice modeled on the Prometric test center.
Practical guidance is original editorial content. Company-published figures are the company's own claims and are labeled as such.
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Cite or share this entry
Patent Bar Practice Questions. “Practice question: means-plus-function claims.” Wysebridge Reference. Content reviewed 9 November 2026.
https://patentbarpracticequestions.com/means-plus-function-question/