Formatting Vietnamese Patent Specifications: Practical Principles and Common Issues

Formatting Vietnamese Patent Specifications: Practical Principles and Common Issues

Why this matters. In Vietnam, formatting a translated patent specification is part of compliance. The official rules define a baseline. The notes below cover the formatting decisions that sit above that baseline, and why each one tends to matter in practice.

1) What the law requires vs. what careful practice adds

Category General Requirements (Baseline) Recommended practice Why it benefits you
Paper & orientation A4, single-sided, portrait (landscape allowed for figures/tables) A4 portrait for the full text; figures still allowed but optimized to fit portrait A single, consistent reading flow; cleaner e-filing/PDFs
Margins ~20 mm each side Fixed 20 mm (2 cm) on all sides Prevents edge clipping; stable pagination
Typeface & size Readable Latin/Vietnamese font; minimum size threshold Times New Roman, 14 pt across the body text Excellent Vietnamese diacritics; easy examiner read
Line spacing Not strictly defined 1.5 lines Improves legibility and on-paper annotation
Paragraphs Not prescribed in detail Justified with 1 cm first-line indent; hyphenation off Professional page color; avoids broken Vietnamese words
Page numbers Required Centered in footer, 1 cm from bottom Easy reference during office actions
Section order Description → Claims → Abstract (Drawings if any) Seven sections: Technical Field; Background; Summary; Brief Description of Drawings; Detailed Description; CLAIMS; ABSTRACT Faster cross-checking; predictable structure
Headings Not stylistically specified Sentence case, bold, left-aligned; CLAIMS/ABSTRACT in ALL CAPS, bold, centered, each on a new page Instantly highlights legal sections; prevents omissions
Figures & numerals Must be consistent Preserve FIG. labels exactly; allow “Hình X” in text; lock 1-to-1 mapping of reference numerals Eliminates broken references; speeds up review
Drawing page numbering No prescribed drawing page numbering style i/N header, centered, 16 pt on each drawing page (e.g., 1/7, 2/7, …) Rapid navigation in PDFs/print; fewer misfiles in office actions
Numbers, units, symbols Use SI; be consistent SI units; decimal comma in Vietnamese outputs (e.g., EN 2.5 cm → VI 2,5 cm); en-dash for ranges (5–10%); keep ≤ ≥ ± Δ No accidental scope shifts; matches VN reading conventions
Claims Numbered and clear New page; hanging indent; one sentence per claim where feasible; comprising → bao gồm (open), consisting of → gồm (closed) Maintains legal structure; reduces ambiguity
Paragraph numbering Optional Omit foreign-style paragraph brackets ([0001], [0002]…) in the Vietnamese specification (per prevailing VN examiner practice) Cleaner page flow; aligns with local practice
Deliverables DOC/PDF acceptable DOCX (styles) + PDF (embedded fonts); versioned filenames Submit now, edit later; clear audit trail

Bottom line: The official rules set the floor; deliberate formatting builds the ceiling. The result is a consistent, cross-verifiable Vietnamese specification that’s easy to examine and safer to file.

2) The principles behind these choices

  • Readability first. Larger type, 1.5 spacing, and disciplined paragraph styling produce a document that examiners and co-counsel can annotate and navigate quickly.
  • 1-to-1 traceability without clutter. Mirror source structures, preserve FIG. numbering and reference numerals, and maintain consistent part names—without importing foreign-style paragraph brackets.
  • Legal clarity in claims. Standardize “comprising/consisting of,” apply hanging indents, and avoid stylistic paraphrasing that could muddy scope.
  • Production reliability. Styles in the DOCX mean edits never break layout; PDFs embed fonts for perfect diacritics; versioned filenames make OA cycles and auditing painless.

3) The practical checklist you can actually use

Page & typography

  • A4, portrait; margins 2 cm all sides; single-sided
  • Times New Roman 14 pt; 1.5 line spacing; hyphenation off
  • Justified paragraphs; 1 cm first-line indent
  • Page numbers centered in footer, 1 cm from bottom

Section order & headings

  • Technical Field → Background → Summary → Brief Description of Drawings → Detailed Description → CLAIMS → ABSTRACT
  • Headings: sentence case, bold, left
  • CLAIMS and ABSTRACT: ALL CAPS, bold, centered, new page
  • Do not add foreign-style paragraph numbering (no [0001] brackets)

Figures & cross-references

  • Keep FIG. labels as in the source; “Hình X” allowed in running text
  • Verify 1-to-1 mapping of reference numerals to part names
  • No missing numerals or “orphaned” references
  • Drawing page numbering: Each drawing page shows the i/N counter in the header, centered, at 16 pt (e.g., 1/7, 2/7…)

Drawing page numbering

Scope: Applies only to the page numbering of the drawings section. It does not change figure identifiers (e.g., Hình 1, Hình 4a remain unchanged).

  • Rule: Use the i/N format (e.g., 1/7, 2/7 …) to number drawing pages.
  • Placement: Header, centered.
  • Typeface/size: Times New Roman, 16 pt (bold optional, but keep consistent).
  • Interaction: In text, cite figures as usual (Hình 1, Hình 4a…). Do not use the i/N counter in running text; it’s a navigation aid.
  • Workflow: Finalize N after layout → add i/N header to each drawing page → export to PDF and check visibility/no clipping.

Claims discipline

  • Claims numbered consecutively; hanging indent; one sentence per claim when feasible
  • comprising → bao gồm (open); consisting of → gồm (closed)
  • Sub-elements separated with semicolons and line breaks (do not alter legal structure)

Numbers, units, symbols

  • SI units; use the decimal comma in Vietnamese outputs (e.g., EN 2.5 cm → VI 2,5 cm) consistently
  • En-dash for ranges (e.g., 5–10%)
  • Preserve ≤, ≥, ±, Δ and variable symbols consistently

Files & versions

  • DOCX (with styles) + PDF (fonts embedded; diacritics verified)
  • Versioned filename: Applicant_Invention_VN-vX.Y.docx (+ matching PDF)

4) What this means for your filing timeline

Fewer formality snags. These choices align with the formal rules while removing common “small but costly” errors (broken numerals, malformed claims layout, inconsistent unit styles).

Faster examiner navigation. Clear headings, claims on their own page, and predictable styles help examiners locate elements quickly—often shortening dialog cycles.

Lower risk of scope drift. Controlled language for “comprising/consisting of,” symbol integrity, and faithful structure reduce the chance of misinterpretation.

Editable today, archival tomorrow. DOCX styles survive future edits; PDFs render perfectly across systems thanks to embedded fonts and tested diacritics.

5) Conclusion

The general regulations keep a specification compliant. The choices above go further, producing a document that is consistent, traceable, and readable from page one to the abstract. Whether the subject is a complex telecom invention or a chemistry composition, deliberate formatting gives the specification its strongest presentation for Vietnam.

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