Patent Bar Examination (USPTO Registration Exam) Patent Disclosure and Claim Drafting (35 USC 112) Syllabus

How is a multiple dependent claim interpreted and counted for fee purposes?

It is construed to incorporate, in the alternative, only the particular claim referenced. For fees, it is counted as the number of claims to which it refers (each alternative counts separately).

In claim format, what are the three structural parts of a claim?

(1) Preamble, (2) transitional phrase (e.g., comprising), and (3) body (the recited limitations/elements).

What is the function of the transitional phrase in a claim?

It links the preamble to the body of the claim and defines whether the claim is open-ended (comprising), partially closed (consisting essentially of), or closed (consisting of).

What does the open transitional phrase 'comprising' mean for claim scope?

'Comprising' (also 'including,' 'containing') is open-ended: the claim covers the listed elements plus any additional, unrecited elements. It does not exclude additional steps or components.

What does the closed transitional phrase 'consisting of' mean for claim scope?

'Consisting of' is closed: the claim is limited to the recited elements only, excluding any element not specified (though impurities ordinarily associated are tolerated).

What does 'consisting essentially of' mean for claim scope?

It is a partially closed (hybrid) phrase limiting the claim to the specified materials/steps plus only those additional unlisted ingredients that do not materially affect the basic and novel characteristics of the invention.

How does infringement scope differ between 'comprising' and 'consisting of' claims?

A 'comprising' claim is infringed even if the accused device adds extra elements; a 'consisting of' claim is infringed only if the accused device contains exactly the recited elements and nothing more (excluding additional materials).

What does 35 U.S.C. 112(f) permit (means-plus-function claiming)?

An element in a combination may be expressed as a means or step for performing a specified function without reciting structure, material, or acts in support thereof.

How is a 35 U.S.C. 112(f) means-plus-function limitation construed?

It is construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof — not all means that perform the function.

What three-prong test does the USPTO use to determine whether a claim limitation invokes 112(f)?

A limitation invokes 112(f) if it: (1) uses the term 'means' (or a generic placeholder), (2) modified by functional language, and (3) not modified by sufficient structure for performing the claimed function.

Does using the word 'means' guarantee 112(f) treatment?

No. Use of 'means' creates a rebuttable presumption that 112(f) applies; reciting sufficient structure rebuts it. Conversely, a limitation lacking 'means' but using a nonce/generic placeholder with functional language can still invoke 112(f).

What happens to a 112(f) computer-implemented means-plus-function claim if the specification discloses no corresponding algorithm?

The claim is indefinite under 112(b) (and lacks written description/enablement) because there is no corresponding structure — for computer-implemented functions, the structure is the algorithm, which must be disclosed.

What is a Markush group (alternative claiming)?

A claim limitation reciting a closed group of alternatives, typically in the form 'selected from the group consisting of A, B, and C.' It claims a defined set of alternative members.

What requirement must members of a proper Markush group satisfy?

The members must share a common use/property and a common structure (or all belong to a recognized class), so they are art-recognized as functionally equivalent for the claimed purpose. Improper Markush grouping can draw a rejection.

What is the correct transitional language for a Markush group?

'Selected from the group consisting of...' — the 'consisting of' makes the listed alternatives a closed group; use of 'comprising' or 'or' improperly opens the group.

What is a product-by-process claim?

A claim to a product defined by the process used to make it (e.g., 'a widget made by the process of...'). It is used when a product is difficult to define by structure alone.

How is a product-by-process claim evaluated for patentability over the prior art?

Patentability is based on the product itself, not the process steps. If the product is the same as or obvious over a prior-art product, the claim is unpatentable even if the prior product was made by a different process.

What is the burden-shifting rule for product-by-process claims during examination?

Once the Examiner shows the product appears to be the same or similar to a prior-art product, the burden shifts to applicant to show an unobvious difference between the claimed product and the prior-art product.

What is a Jepson claim?

An improvement claim that recites the prior art in the preamble (e.g., 'In a [known device], the improvement comprising...'), with the transitional phrase 'wherein the improvement comprises' separating the old from the new.

What is the effect of writing a claim in Jepson form on the preamble?

The preamble of a Jepson claim is treated as an admission that the recited matter is prior art (admitted prior art), and it is given patentable weight as a positive limitation; only the portion after 'the improvement comprising' is the novel contribution.

What is Broadest Reasonable Interpretation (BRI) and when is it used?

BRI is the standard the USPTO uses during examination: claims are given their broadest reasonable interpretation consistent with the specification as understood by a POSITA. It is used because claims can still be amended before issuance.

Why does the USPTO use BRI rather than the narrower court (Phillips) standard?

Because during prosecution the applicant can still amend claims to clarify scope; BRI reduces the chance that an unduly broad claim issues and forces the applicant to precisely define the invention.

How is a claim construed 'in light of the specification' under BRI?

Claim terms are given their ordinary and customary meaning to a POSITA, read in light of the specification, but limitations from the specification are not read into the claims absent a clear definition or disclaimer.

When can a special definition from the specification override a term's ordinary meaning?

When the applicant acts as a lexicographer — clearly setting forth a special definition of the term in the specification with reasonable clarity, deliberateness, and precision.

What is the antecedent basis requirement in claim drafting?

When a claim element is referred to with 'the' or 'said,' it must have a proper antecedent — i.e., it must have been previously introduced (typically with 'a' or 'an'). Lack of antecedent basis renders the claim indefinite under 112(b).

How is a claim element typically introduced versus later referenced to maintain antecedent basis?

It is first introduced with the indefinite article 'a' or 'an' (e.g., 'a widget'), then later referred to with the definite article 'the' or 'said' (e.g., 'the widget').

Give an example of a lack-of-antecedent-basis defect.

A claim reciting 'the lever' or 'said housing' when no 'a lever' or 'a housing' was previously introduced. The Examiner rejects the claim as indefinite under 112(b) for lacking antecedent basis.

Does an inherent or implicit antecedent ever suffice?

Yes. If the meaning is reasonably clear from the claim as a whole, an inherent antecedent (e.g., 'the surface' of a previously recited element) may satisfy the requirement, but explicit antecedent basis is the safer practice.

What is the relationship between claim breadth and the enablement/written description requirements?

The broader the claim, the more the specification must disclose to support it. A broad genus claim requires either a representative number of species or disclosure of common structural features so the full claimed scope is both described (possession) and enabled.

Can a single defect in the specification trigger rejections under more than one prong of 112(a)?

Yes. A deficient disclosure may simultaneously fail written description (no possession), enablement (undue experimentation needed), and best mode — these are independent requirements that can each be the basis of a separate rejection.