Means-Plus-Function And Step-Plus-Function Claim Limitations (35 U.S.C. 112(f)): Memo To Examiners From The USPTO

On March 18, 2024, the United States Patent and Trademark Office (USPTO) sought to improve clarity of the patent prosecution record through providing patent examiners with reminders and increased guidance on analyzing means-plus-function and step-plus-functions claims.¹ Resources for Examining Means-Plus-Function and Step-Plus-Function Claim Limitations (35 U.S.C. 112(f)) (uspto.gov). In particular, the memo highlights guidance in the M.P.E.P relating to

• determining whether a claim limitation invokes § 112(f);
• ensuring that the record is clear with respect to § 112(f); and
• evaluating the description necessary to support a § 112(f) claim limitation under 35 U.S.C. 112(a) and (b).