35 USC 112(d): Multiple Dependent Claim Rules, Costs, and Uses

Under 35 U.S.C. 112, a multiple dependent claim must reference two or more previously set forth claims in the alternative only, must further limit the subject matter of those claims, and cannot serve as the basis for another multiple dependent claim. Those requirements come from two subsections working together: 112(d) sets the baseline rule for every dependent claim, and 112(e) adds the restrictions that apply when a dependent claim references more than one parent. Getting either wrong draws an objection or rejection, and the fee structure penalizes the format heavily enough that the drafting choice deserves real thought before filing.

How 112(d) and 112(e) Fit Together

Section 112(d) opens with the phrase “Subject to subsection (e),” which tells you the general dependent-claim rule bends when the claim is in multiple dependent form.¹ The baseline 112(d) rule requires every dependent claim to reference a claim previously set forth and to specify a further limitation of the subject matter. A multiple dependent claim has to do both of those things and satisfy the additional 112(e) requirements.

Section 112(e) adds three rules that apply only to multiple dependent claims. The claim must reference more than one previously set forth claim in the alternative only. No multiple dependent claim may serve as the basis for any other multiple dependent claim. And the claim incorporates by reference the limitations of whichever particular claim it is being considered in relation to, not all referenced claims at once.¹ That last point does more work than it looks. A multiple dependent claim is treated as a bundle of separate dependent claims, each evaluated independently against its own parent.

Which subsection an examiner cites in a rejection depends on the defect. Failure to further limit draws a 112(d) rejection. Conjunctive language or nesting draws a 112(e) rejection. If either defect makes the claim scope unclear, the examiner can also reject under 112(b) for indefiniteness.²

The Alternative-Only Rule

The single most important drafting rule is that a multiple dependent claim must reference other claims in the alternative. Alternative means disjunctive: “or,” “any one of,” or equivalent phrasing. Conjunctive references using “and” are never acceptable. The MPEP gives detailed examples of both.³

Acceptable phrasing looks like:

“A machine according to claims 3 or 4, further comprising…” — a clear alternative reference with a further limitation.
“A gadget as in any one of the preceding claims, in which…” — valid shorthand referencing all earlier claims in the alternative.

Unacceptable phrasing includes:

“A gadget according to claim 3 and 4, further comprising…” is a conjunctive reference and will draw an objection.
“A gadget as in claims 1 or 2 and 7 or 8, which…” mixes alternative and conjunctive references across two groups.
“A gadget as in claims 1, 2, 3, 4 and/or 5, in which…” uses “and/or,” which introduces ambiguity about whether the reference is truly alternative.
“A gadget as in claims 1-3, in which…” uses a range without “any one of” and can be read as cumulative rather than alternative.

The claim must also reference only previously set forth claims. Pointing forward to a higher-numbered claim, or referencing itself, will draw an objection and the examiner will not address the claim on the merits.³

The No-Nesting Rule

A multiple dependent claim cannot serve as the basis for any other multiple dependent claim.¹ The MPEP applies this prohibition both directly and indirectly, so an applicant cannot chain multiple dependent claims through intermediate single dependent claims to achieve the same effect.³

A single dependent claim can, however, depend from a multiple dependent claim. If claim 4 is a proper multiple dependent claim referencing claims 2 or 3, claim 5 can depend from claim 4 alone. Claim 5 remains a single dependent claim, but for fee calculation purposes it inherits the multiplied count from claim 4.⁴

One pattern examiners see constantly is a set of foreign claims (where nesting is permitted in some jurisdictions) converted directly into a U.S. application without restructuring. The resulting nested dependencies require amendment, adding prosecution delay and cost.

Further Limitation and Antecedent Basis

Structural correctness is not enough. The claim must specify a further limitation of the referenced subject matter. Simply restating or broadening what the parents already recite draws a rejection under 112(d).¹

Antecedent basis problems are common when a multiple dependent claim references parents that use different terminology for the same element. If claim 1 refers to a “housing” and claim 2 refers to a “casing,” a multiple dependent claim 3 that references “the housing” while depending from claims 1 or 2 creates confusion when read against claim 2. Each version of the claim must independently meet the definiteness requirement of 112(b), which under Nautilus, Inc. v. Biosig Instruments, Inc. asks whether the claim informs those skilled in the art of the invention’s scope with reasonable certainty.² Pick language compatible with every parent, or use broader phrasing that avoids the conflict.

How Each Version of the Claim Is Evaluated

Because the claim incorporates the limitations of whichever parent it is being considered against, the USPTO evaluates it as several separate claims. If claim 4 depends from claims 1 or 2, the examiner assesses claim 4 as dependent from claim 1 and separately as dependent from claim 2. Claim 4 might be unpatentable read with claim 2 and fully patentable read with claim 1.

The 2023 Director’s Decision in Nested Bean, Inc. v. Big Beings USA Pty Ltd confirmed this reading in the inter partes review context. The Patent Trial and Appeal Board had treated a multiple dependent claim as unpatentable if either version was unpatentable. The Director reversed, holding that the plain language of 35 U.S.C. 112 and the presumption of validity under 35 U.S.C. 282 require separate patentability analysis for each alternative.⁵ The decision noted that fee rules under 37 C.F.R. § 1.75 reinforce this reading by charging separately for each reference, and that longstanding MPEP guidance treats a multiple dependent claim “in the same manner as a plurality of single dependent claims.”

The practical consequence: if an examiner rejects one version but not the other, the claim survives for the unrejected version. In inter partes review, a petitioner must separately prove unpatentability for each version or the claim stands.

What Multiple Dependent Claims Cost

Multiple dependent claims trigger fees two different ways, and both can add up faster than expected. The first is a flat surcharge under 37 C.F.R. § 1.16(j): $925 for a large entity, $370 for a small entity, or $185 for a micro entity. This fee applies once per application containing at least one multiple dependent claim, not per multiple dependent claim.⁶

The second cost is claim-count inflation. The USPTO charges $200 per claim (large entity) for each claim in excess of 20 total, and $600 per independent claim in excess of three.⁶ A multiple dependent claim counts as the number of claims it directly references. A single multiple dependent claim referencing five prior claims counts as five claims for fee purposes.⁴

The cascade makes it worse. If claim 5 is a single dependent claim that depends from claim 4, and claim 4 is a multiple dependent claim referencing claims 2 or 3, claim 5 also counts as two claims for fee purposes because its parent references two.³ An application that looks like 15 claims on paper can count as 35 for fee purposes. Run the count before filing.

When Multiple Dependent Claims Are Worth Using

The format is a strategic choice, not a default. The $925 surcharge plus the inflated excess claim count can make multiple dependent claims more expensive than writing out the same coverage as individual single dependent claims. In many cases the math favors separate claims.

Multiple dependent claims earn their keep in complex inventions with many interrelated features, where writing out every combination as a standalone claim would make the application unwieldy. The Nested Bean reading adds a defensive layer: because each version is evaluated independently, a well-drafted multiple dependent claim can survive a challenge that knocks out one of its parents. A single dependent claim hanging from the same invalidated parent falls with it. For patents likely to face post-grant challenge, that resilience may justify the added fees.

A Note on International Filings

The U.S. restrictions do not apply everywhere. Under the Patent Cooperation Treaty, Rule 6.4(a) mirrors the U.S. approach: alternative-only references and no nesting.⁷ The European Patent Office permits multiple dependent claims to reference other multiple dependent claims, and many other jurisdictions follow that approach.

For applicants filing in both the U.S. and Europe, drafting the initial claim set to comply with the stricter U.S. rules and then expanding dependencies for European filings is the cheaper direction. Going the other way almost always requires more amendment work.

1
Office of the Law Revision Counsel. 35 USC 112 Specification
2
United States Patent and Trademark Office (USPTO). MPEP Chapter 2100 Section 2173 – Claims Must Particularly Point Out and Distinctly Claim the Invention
3
United States Patent and Trademark Office (USPTO). MPEP Section 608 – Disclosure
4
eCFR. 37 CFR 1.75 – Claims
5
United States Patent and Trademark Office. Nested Bean Inc. v. Big Beings USA PTY LTD IPR2020-01234 Director Decision
6
USPTO – United States Patent and Trademark Office. USPTO Fee Schedule
7
United States Patent and Trademark Office (USPTO). MPEP Chapter 1800 Section 1824 – The Claims