Patent Law Editing and Proofreading Services
A patent application reaches the office as a set of papers whose dimensions are fixed in advance. For application papers filed on paper or by facsimile, 37 CFR 1.52(a)(1)(ii) fixes the sheet size and then sets the margins as minimums.1 The left margin is at least one inch, and the top, right, and bottom margins at least three quarters of an inch.1 Paragraph (b)(2) asks for a single column of text, one and a half or double spaced, in a nonscript font.1
The parts in sequence, and an option for the paragraphs
The arrangement is recommended rather than commanded. Under 37 CFR 1.77(b), the specification "should include the following sections in order", and thirteen are listed.2 The list opens with the title of the invention and the cross-reference to related applications, and closes with the claims, the abstract, and any sequence listing.2
Paragraph numbering is offered, not required, and 37 CFR 1.52(b)(6) begins by excepting a reissue application and a reexamination or supplemental examination proceeding.1 Elsewhere the paragraphs of the specification, other than in the claims or abstract, "may be numbered at the time the application is filed".1 The same sentence continues that they "should be individually and consecutively numbered using Arabic numerals, so as to unambiguously identify each paragraph."1
Where the writing gets tested
The statutory requirement is short. Under 35 U.S.C. 112(b), the specification "shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention."3 The requirement rests on two adverbs, particularly and distinctly, and the Supreme Court has stated the standard those words set.
Nautilus, Inc. v. Biosig Instruments, Inc. was decided on June 2, 2014.4 The test is a conditional. A patent "is invalid for indefiniteness if its claims, read in light of the specification delineating the patent, and the prosecution history, fail to inform" a particular audience.4 That audience is "those skilled in the art", and what they must learn "with reasonable certainty" is "the scope of the invention."4 The Court then declined to apply the standard it had announced, quoting Cutter v. Wilkinson for the point that it is "a court of review, not of first view."4 It vacated the judgment of the Federal Circuit and remanded.4
The form of the claims is governed separately. Under 37 CFR 1.75(i), "Where a claim sets forth a plurality of elements or steps, each element or step of the claim should be separated by a line indentation."5 Paragraph (g) has the least restrictive claim "presented as claim number 1", with dependent claims "grouped together with the claim or claims to which they refer to the extent practicable."5
Numbering the drafter does not control
Once prosecution starts, the numbering follows the rule. Under 37 CFR 1.126, "The original numbering of the claims must be preserved throughout the prosecution."6 When claims are canceled the remaining claims "must not be renumbered", and added claims begin "with the number next following the highest numbered claim previously presented (whether entered or not)."6 A file can therefore run claims 1, 4, 7, and 12. At allowance the examiner "if necessary, will renumber the claims consecutively in the order in which they appear or in such order as may have been requested by applicant."6
Amendments carry their own notation. Under 37 CFR 1.121(c), each claim in an amendment takes a status identifier in parentheses after its number, and the rule lists seven: original, currently amended, canceled, withdrawn, previously presented, new, and not entered.7 The same paragraph adds one combined identifier, for a withdrawn claim that is also being amended.7 Added text is underlined and deleted matter is struck through.7 Double brackets have two uses: they may show a deletion of five or fewer consecutive characters, and they must be used where strike-through cannot be easily perceived.7
What we work on, and what we do not
Claim drafting is legal work and it is not ours. We do not write, broaden, narrow, or interpret a claim, and we express no view on whether a claim is definite or on what it covers. Those decisions belong to the attorney or agent prosecuting the application.
The work that remains is on the page and in the wording. A reading reports how many spellings of one term appear across the specification and the claims. Where a claim introduces an element, the reading reports whether an antecedent for it appears earlier in that claim. Reference numerals are checked against the drawings they point at. Each document a client sends is kept confidential.
The specification is written once and read for years afterward. Its readers are examiners at the office, attorneys on the other side, and sometimes a court applying the reasonable certainty test. None of them was present when the sentence was drafted.
Appendix: the abstract, paragraph numbers, and the number of claims
37 CFR 1.72(b) has the abstract commence on a separate sheet, "preferably following the claims", under the heading "Abstract" or "Abstract of the Disclosure."8 That sheet "may not include other parts of the application or other material."8 The abstract is to be "as concise as the disclosure permits, preferably not exceeding 150 words in length."8 Its stated purpose is to enable "the Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure."8
Under 37 CFR 1.52(b)(6) a paragraph number "should consist of at least four numerals enclosed in square brackets, including leading zeros".1 The number and its brackets appear "to the right of the left margin as the first item in each paragraph", and section headers "should not be numbered".1
37 CFR 1.75(b)(1) permits more than one claim provided they "differ substantially from each other and are not unduly multiplied."5
References
- Office of the Federal Register, Electronic Code of Federal Regulations, 37 CFR 1.52, Language, paper, writing, margins, read-only optical disc specifications, current as of August 2026. https://www.ecfr.gov/current/title-37/chapter-I/subchapter-A/part-1/subpart-A/section-1.52 ↩
- Office of the Federal Register, Electronic Code of Federal Regulations, 37 CFR 1.77, Arrangement of application elements, current as of August 2026. https://www.ecfr.gov/current/title-37/chapter-I/subchapter-A/part-1/subpart-A/section-1.77 ↩
- Cornell Law School, Legal Information Institute, 35 U.S.C. 112, Specification, as amended by the Leahy-Smith America Invents Act, Public Law 112-29, effective September 16, 2012. https://www.law.cornell.edu/uscode/text/35/112 ↩
- Supreme Court of the United States, Nautilus, Inc. v. Biosig Instruments, Inc., 572 U.S. 898, June 2, 2014. https://www.law.cornell.edu/supremecourt/text/13-369 ↩
- Office of the Federal Register, Electronic Code of Federal Regulations, 37 CFR 1.75, Claim(s), current as of August 2026. https://www.ecfr.gov/current/title-37/chapter-I/subchapter-A/part-1/subpart-A/section-1.75 ↩
- Office of the Federal Register, Electronic Code of Federal Regulations, 37 CFR 1.126, Numbering of claims, current as of August 2026. https://www.ecfr.gov/current/title-37/chapter-I/subchapter-A/part-1/subpart-B/section-1.126 ↩
- Office of the Federal Register, Electronic Code of Federal Regulations, 37 CFR 1.121, Manner of making amendments in applications, current as of August 2026. https://www.ecfr.gov/current/title-37/chapter-I/subchapter-A/part-1/subpart-B/section-1.121 ↩
- Office of the Federal Register, Electronic Code of Federal Regulations, 37 CFR 1.72, Title and abstract, current as of August 2026. https://www.ecfr.gov/current/title-37/chapter-I/subchapter-A/part-1/subpart-A/section-1.72 ↩
A worked example: Claim Amendment Paper
Patent application, amendment to the claims
Two rules govern how an amendment to the claims is written down. Under 37 CFR 1.126, "The original numbering of the claims must be preserved throughout the prosecution." When claims are canceled the remaining claims are not renumbered, and added claims continue from the number after the highest previously presented. Under 37 CFR 1.121(c), each claim carries a status identifier in parentheses after its number, drawn from a list of seven that the rule sets out. Added text is underlined and deleted matter is struck through. Double brackets are available for deletions of five or fewer consecutive characters, and are required where strike-through cannot be easily perceived. Both rules are about notation rather than about what a claim covers. The extract below is reproduced unchanged in both panels, and every claim number, status identifier, and marking in the revision follows from it. Claim scope is the attorney's, and not one word inside a claim is written, added, or reworded here.
Before
SPECIMEN, PREPARED BY EDITFAST FOR ILLUSTRATION. NOT A REAL RECORD.
Fenwright & Ostler LLP (fictitious), amendment under 37 CFR 1.111
EXTRACT FROM THE FIRM'S PROSECUTION RECORD (reproduced unchanged in both panels)
PR-1 Claims 1 to 6 were filed originally and none of them has been amended. Claim 7 was added in the first amendment and was entered.
PR-2 Claim 3 was canceled in the first amendment. Claim 5 was withdrawn following a restriction requirement, and its text is not in the papers supplied to the editor.
PR-3 In this amendment: claim 1 is being amended; claims 2 and 6 are unchanged; claim 4 is being canceled; one new claim is added.
PR-4 The change to claim 1 is the substitution of the word "seat" for the word "ring" in the second element.
PR-5 The firm files amendments with the claims in ascending numerical order.
PR-6 In text-only working copies the firm shows underlining by enclosing the added text in underscores.
AMENDMENT TO THE CLAIMS
1. (amended) A coupling assembly comprising a body, an annular seat, and a retainer.
2. (as filed) The assembly of claim 1, wherein the retainer is threaded.
4. (deleted)
6. (as filed) The assembly of claim 1, wherein the body is brass.
7. (pending) The assembly of claim 2, wherein the retainer is polymeric.
8. (new) The assembly of claim 1, wherein the retainer is captive.
After
SPECIMEN, PREPARED BY EDITFAST FOR ILLUSTRATION. NOT A REAL RECORD.
Fenwright & Ostler LLP (fictitious), amendment under 37 CFR 1.111
EXTRACT FROM THE FIRM'S PROSECUTION RECORD (reproduced unchanged in both panels)
PR-1 Claims 1 to 6 were filed originally and none of them has been amended. Claim 7 was added in the first amendment and was entered.
PR-2 Claim 3 was canceled in the first amendment. Claim 5 was withdrawn following a restriction requirement, and its text is not in the papers supplied to the editor.
PR-3 In this amendment: claim 1 is being amended; claims 2 and 6 are unchanged; claim 4 is being canceled; one new claim is added.
PR-4 The change to claim 1 is the substitution of the word "seat" for the word "ring" in the second element.
PR-5 The firm files amendments with the claims in ascending numerical order.
PR-6 In text-only working copies the firm shows underlining by enclosing the added text in underscores.
AMENDMENT TO THE CLAIMS
1. (Currently amended) A coupling assembly comprising a body, an annular [[ring]] _seat_, and a retainer.
2. (Original) The assembly of claim 1, wherein the retainer is threaded.
3. (Canceled)
4. (Canceled)
5. (Withdrawn) [Query to the attorney: PR-2 records claim 5 as withdrawn and its text as not supplied to us. Please insert the claim as previously presented. We have not drafted a placeholder.]
6. (Original) The assembly of claim 1, wherein the body is brass.
7. (Previously presented) The assembly of claim 2, wherein the retainer is polymeric.
8. (New) The assembly of claim 1, wherein the retainer is captive.
What changed, and why
| Was | Now | Reason |
|---|---|---|
| 1. (amended) | 1. (Currently amended) | Amended is not on the list in 37 CFR 1.121(c). The identifier for a claim being changed in this paper is Currently amended, and the identifiers are capitalized as the rule prints them. |
| A coupling assembly comprising a body, an annular seat, and a retainer. | A coupling assembly comprising a body, an annular [[ring]] _seat_, and a retainer. | PR-4 records that seat replaces ring in this amendment, and the clean text did not show the change the paper is filed to show. Ring is four characters, so 37 CFR 1.121(c) allows double brackets for the deletion, and PR-6 gives the underscores as this firm's way of showing the underlining the rule asks for. |
| 2. (as filed) | 2. (Original) | As filed is not an identifier the rule recognizes. PR-1 records claims 1 to 6 as filed originally with none of them amended, which is what Original means. |
| 4. (deleted) | 4. (Canceled) | Deleted is not on the list. PR-3 records claim 4 as being canceled in this amendment. |
| (claim 3 absent from the listing) | 3. (Canceled) | PR-2 records claim 3 as canceled earlier. An amendment lists every claim ever presented, and under 37 CFR 1.126 the numbering is preserved, so the number stays with its status rather than closing up. |
| (claim 5 absent from the listing) | 5. (Withdrawn) [Query to the attorney: PR-2 records claim 5 as withdrawn and its text as not supplied to us. Please insert the claim as previously presented. We have not drafted a placeholder.] | PR-2 records claim 5 as withdrawn and records that its text was not supplied to us. Withdrawn is an identifier on the list, and 37 CFR 1.121(c) has all claims in a listing presented in ascending numerical order. The text is the attorney's to insert, so the line carries a query and no draft. |
| 6. (as filed) | 6. (Original) | Same identifier fault as claim 2, and the same entry at PR-1 settles it. |
| 7. (pending) | 7. (Previously presented) | Pending is not on the list. PR-1 records claim 7 as added in the first amendment and entered, which is Previously presented in this paper. |
| 8. (new) | 8. (New) | The identifier is on the list. The rule prints it capitalized, and this listing follows that. |
Final specimen (PDF, 4 KB) Marked-up specimen (PDF, 7 KB)
Specimen prepared by EditFast for illustration only. Not a real document, record or filing. Any resemblance to an actual organization, person or record is unintended. Not legal, regulatory, clinical or professional advice.
Key Patent Law vocabulary
- Specification
- Claim
- Independent claim
- Dependent claim
- Multiple dependent claim
- Preamble
- Transitional phrase
- Body of the claim
- Element
- Limitation
- Antecedent basis
- Means-plus-function
- Markush group
- Jepson claim
- Definiteness
- Indefiniteness
- Reasonable certainty
- Enablement
- Written description
- Best mode
- Abstract of the disclosure
- Title of the invention
- Background of the invention
- Brief summary of the invention
- Detailed description
- Brief description of the drawings
- Reference numeral
- Drawing sheet
- Cross-reference to related applications
- Incorporation by reference
- Sequence listing
- Application data sheet
- Inventor's oath or declaration
- Office action
- Restriction requirement
- Election
- Amendment
- Status identifier
- Currently amended
- Previously presented
- Not entered
- Prosecution history
- File wrapper
- Examiner
- Allowance
- Notice of allowance
- Continuation
- Divisional
- Continuation-in-part
- Provisional application
- Nonprovisional application
- Priority claim
- Information disclosure statement
- Prior art reference
- Claim chart
- Paragraph numbering
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