Patent Drawings in the Netherlands: 9 Critical Rules

The Netherlands is one of the few European jurisdictions where nobody at the patent office will ever tell you your invention is obvious. Octrooicentrum Nederland grants on registration: a search report is drawn up, published, and the patent issues whatever that report says. That inverts the normal order of risk. Patent drawings in the Netherlands are not a formality you clear on the way to a substantive examination — in administrative terms they are very nearly the whole examination, and the first person to read them critically is likely to be a judge at the District Court of The Hague.

Why Patent Drawings in the Netherlands Decide More Than the Examiner Does

A Dutch national patent is a registration patent. Octrooicentrum Nederland does not assess novelty or inventive step before grant. A search report is prepared — in practice by the European Patent Office under a long-standing cooperation arrangement — it is published with the application, and then the patent is granted whatever that report happens to say.

Read that sentence again from a drafting perspective. Nobody at the office will tell you the invention is obvious. Nobody will narrow your claims. The only pre-grant gate you actually have to clear is the formal one, and the figures are the largest single component of it.

So the usual mental model fails here. In Washington or Munich, a drawing objection is an annoyance on the way to a substantive fight. In The Hague it is closer to the whole of the administrative file. Our patent drawing services treat a Dutch set accordingly: the figures are not supporting material, they are the part of the disclosure that gets tested last and hardest, in court, with no examiner having ever cleaned them up.

Nine rules decide whether a Dutch set holds up: the sheet format and the margins that catch imported US drawings, the one-dark-colour rule with no petition behind it, the filing route that does not exist, and the Rule 46 EPC citation that has been wrong since February 2023. Each one below is drawn from the office’s own published requirements or from the governing statute.

Two Routes In, and the Third One Is Closed

Before you format a single sheet, settle which route the drawings are being formatted for. There are only two live ones into the Netherlands, and the one most foreign filers reach for by reflex does not exist.

• A direct Dutch national filing at Octrooicentrum Nederland, under the Rijksoctrooiwet 1995 (the Kingdom Patents Act). Drawings follow the Dutch formal requirements described below.
• A European patent via the EPO, then brought into effect in the Netherlands. Drawings follow EPO practice, and the EPO’s drawing sheets pass through unchanged — validation does not re-open the figures.
• A PCT national phase — unavailable. The Netherlands has closed its national route. WIPO’s own PCT Applicant’s Guide states it in four words for the Dutch office: “The Office closed the national route.” An international application reaches the Netherlands only by entering the European regional phase at the EPO.

That third point catches people every year. A client with a PCT application and a 30-month deadline cannot elect the Netherlands directly, pay a national fee and hand Octrooicentrum Nederland a set of PCT-format sheets. They go to the EPO or they get nothing. If the Netherlands is a target market, the decision about figure format is made at the EPO, not in Rijswijk.

For a direct Dutch filing the Paris Convention route remains open: a national application within twelve months of a first foreign filing, claiming priority. That is the only path on which the Dutch formal drawing rules below govern your sheets directly. We cover the route mechanics in more detail in our guide to how to file a patent in the Netherlands.

Rule 1: A4 Only, With a 2.5 cm Left Margin

Octrooicentrum Nederland publishes its formal requirements for Dutch patent documents directly, and the drawing specification is short. Sheets are A4 (21 × 29.7 cm), used on one side only, on paper that is flexible, strong, white, smooth, non-glossy, uncreased, untorn, unfolded and durable.

The margins are the part that quietly breaks imported sheets:

• Top margin: 2 cm
• Left margin: 2.5 cm
• Right margin: 2 cm
• Bottom margin: 2 cm

Compare 37 CFR 1.84(g), which asks for at least 2.5 cm at the top, 2.5 cm at the left, 1.5 cm at the right and 1.0 cm at the bottom. Neither specification is a superset of the other. A compliant US sheet has a right margin of 1.5 cm and a bottom margin of 1.0 cm, and fails the Dutch 2 cm requirement on both edges. A compliant Dutch sheet has a 2 cm top margin and fails the US 2.5 cm requirement there.

The practical consequence is that there is no single sheet layout that satisfies both offices at the minimum. If you want one master set that travels, build to the strictest value on every edge — 2.5 cm top, 2.5 cm left, 2 cm right, 2 cm bottom — and you clear both. That is the same arithmetic we work through for other jurisdictions in USPTO drawing margins.

Rule 2: One Dark Colour — No Colour, No Photographs, No Petition

The Dutch instruction on line work is one clause long: execute the drawings in strong, evenly drawn lines in one dark colour. That single phrase does three jobs. It requires line weight sufficient for reproduction, it requires consistency across the sheet, and it limits you to one dark colour — which is to say, it excludes colour drawings.

Photographs are not permitted either. There is no stated exception and, critically, no petition route. This is where Dutch practice diverges sharply from the one most US practitioners carry in their heads.

• United States, utility applications. 37 CFR 1.84(a)(2) allows colour drawings, but only after the Office grants a petition, with the fee under 37 CFR 1.17(h), the prescribed sets of drawings, and a specific statement added to the specification. Colour is available, at a price, on request.
• United States, design applications. Colour drawings are permitted under 1.84(a)(2) with no petition and no fee — the sets and the specification reference are still required. Note that 37 CFR 1.152 separately requires a design to be shown in a drawing complying with 1.84 and containing a sufficient number of views to constitute a complete disclosure of the appearance of the design.
• EPO. Since 1 October 2025 the EPO accepts drawings filed electronically in colour or greyscale, under a Decision of the President of the EPO (OJ EPO 2025, A49) and the accompanying notice (OJ EPO 2025, A57). They must be contrast-rich and clear at 300 dpi. Description, claims and abstract stay black and white.
• Netherlands. One dark colour. No photographs. No petition, no fee, no exception on the record.

The asymmetry matters most on the EP route. You can now file colour figures at the EPO and have them published in colour. That does not make them Dutch-compliant sheets — it makes them EPO sheets, which reach the Netherlands through validation rather than through the Dutch formal requirements. If the same invention is also going in as a direct Dutch national application, you need a black-line version. We walk through the EPO’s colour position separately in EPO colour patent drawings.

One more trap for anyone working from a PCT application: the PCT itself was not changed when the EPO moved on colour. PCT Rule 11.13(a) still requires drawings in durable, black, sufficiently dense and dark, uniformly thick and well-defined lines and strokes without colourings. A colour set that is fine at the EPO today is still irregular under the PCT.

Rule 3: Stop Citing Rule 46 EPC — It Was Deleted

If you are taking the European route into the Netherlands, this is the correction to make in your templates. Rule 46 EPC, headed “Form of the drawings”, no longer exists. The EPO’s own legal text renders it as “Rule 46 – (deleted)”.

Rule 46 EPC and Rule 49(3) to (12) EPC were deleted with effect from 1 February 2023, as part of the Administrative Council’s digital-transformation package adopted at its 172nd session on 13 October 2022. Rules 49(2), 50, 57(i) and 82(2) EPC were adapted to match.

The drawing form requirements did not vanish; they moved into a Decision of the President of the EPO published in the Official Journal. That is precisely why the EPO was able to permit colour drawings in 2025 without amending the Implementing Regulations — the presentation rules are now in an instrument the President can change.

So an opinion letter that promises “Rule 46 EPC-compliant figures” is citing a rule that has not been law for over three years. The accurate formulation is that the form of drawings in European applications is set by a Decision of the President of the EPO, with the Guidelines for Examination Part A, Chapter IX giving the working detail. Our comparison of USPTO vs EPO patent drawings uses the current framing throughout.

Rule 4: Figure Text Must Match the Language of the Description

Dutch practice allows almost no text in the figures. The permitted set is narrow and the office spells it out: labels such as water, steam, “II-II” for a cross-section, open and closed, plus — for electrical block diagrams or manufacturing flow diagrams — the designations necessary for proper understanding.

The binding condition is the language rule: whatever words do appear must be in the same language as the description. File the description in Dutch and your figure labels must be Dutch. File in English and they must be English. A set that carries German labels inside the figures while the description is in Dutch is irregular on its face.

This is a real failure mode on CAD-derived figures, because the labels are rarely visible to the person doing the filing. Title blocks, layer names baked into exported line art, dimension callouts, units, and legend text in the source language all travel with the file. Strip them, then replace reference text with reference numerals keyed to the description.

Figures must also be clearly separated from one another and numbered consecutively. That matches 37 CFR 1.84(u), which wants views numbered in consecutive Arabic numerals, and it matters more in the Netherlands than elsewhere: since nobody examines the substance, the figure list and the numerals are the only index into the disclosure that a later reader has.

Rule 5: Reference Numerals Survive the Dutch Claim Translation

On the European route there is a translation step with a direct effect on your figures. To bring a granted European patent into effect in the Netherlands, a translation of the claims into Dutch must be filed within three months of grant, together with the prescribed fee. If the patent was granted in German or French rather than English, a translation of the description into English or Dutch is required as well.

Reference signs are the exposure. Rule 43(7) EPC puts reference signs from the drawings in parentheses in the claims, and says they are not to be construed as limiting. They are nonetheless part of the claim text that gets translated. A translator who renumbers, drops a parenthetical, or silently harmonises an inconsistency creates a Dutch claim set whose numerals no longer line up with the published figures.

Nobody at the office will catch it, because nobody is examining. It surfaces years later, in an infringement action, as an argument that the Dutch claim and the drawing disclose different things. The fix is procedural and cheap: proof the Dutch claims against the figure sheets numeral by numeral before the three-month window closes. We cover the numeral discipline itself in patent drawing reference numerals, and the validation mechanics in validating a European patent in the Netherlands.

Rule 6: The Article 76 Advisory Opinion Reads Your Figures

Because grant carries no finding of validity, the Rijksoctrooiwet 1995 provides a mechanism that has no close US analogue. Under Article 76 ROW 1995, Octrooicentrum Nederland can issue an advisory opinion on the validity or scope of a Dutch patent. It is not binding, but it is influential, and parties use it to price a dispute before committing to litigation.

An Article 76 opinion is the first occasion on which anyone at the office looks hard at your disclosure — and by then the file is closed. The drawings are read as filed. If a figure is ambiguous, if a numeral appears in the description but on no sheet, if a sectional view was promised in the figure list and never drawn, that is the state of the record.

Article 77 ROW 1995 adds the companion rule worth knowing: double protection by a Dutch national patent and a European patent for the same invention is prohibited. You will not be running parallel national and European figure sets for the same subject matter indefinitely — one of them gives way.

Rule 7: Where the Figures Finally Get Tested — The Hague, Twice

Dutch patent litigation is concentrated to an unusual degree, and all of it sits in one city.

• Dutch national patents. Article 80 ROW 1995 gives the District Court of The Hague (Rechtbank Den Haag) exclusive first-instance jurisdiction over patent infringement and validity, including declaratory actions brought by a party seeking a ruling that its acts do not infringe. Appeals go to the Court of Appeal of The Hague.
• European and unitary patents. The Unified Patent Court has a local division seated in The Hague, operating since the Court opened in 2023. Its registry operations were transferred to the Netherlands Patent Office in 2024.

That concentration is why the Netherlands punches above its size in European patent enforcement, and it is why figure quality has a commercial value here that it does not have in a jurisdiction with twenty competing venues. A small, specialised bench reads a lot of drawings. It notices when a set is inconsistent.

For the two Dutch cities where most of that work originates, we maintain local pages: patent drawing services in Amsterdam and patent drawing services in Eindhoven, alongside the country overview at IP services in the Netherlands. Our guide to patent litigation in the Netherlands covers the procedure in full.

Rule 8: Designs Do Not Go to the Patent Office at All

One structural point that trips up US filers who are used to utility and design applications sitting in the same building. There is no Dutch national design patent. Octrooicentrum Nederland does not register designs.

Appearance is protected through the Benelux Office for Intellectual Property (BOIP) as a Benelux design covering the Netherlands, Belgium and Luxembourg together, or through the EU Intellectual Property Office as a registered Community design, or internationally through the Hague System. Each of those has its own representation requirements, and none of them is 37 CFR 1.84.

That is worth stating plainly because the US design rule is often assumed to travel. It does not. 37 CFR 1.152 governs the drawing in a US design patent application: the design must be represented by a drawing complying with 37 CFR 1.84, containing a sufficient number of views to constitute a complete disclosure of the appearance of the design.

Two details of 1.152 are worth keeping straight. Surface shading “should” be used rather than “must”, so it is not strictly required; and solid black surface shading is not permitted except to represent the colour black or to show colour contrast. None of that is Dutch law, and none of it applies to a Benelux or Community design filing.

If a product is going into the Netherlands with both a technical and an appearance story, you are preparing two unrelated deliverables: black-line technical figures for the patent application, and views built to BOIP or EUIPO representation standards for the design. Budget for both.

Rule 9: A Pre-Filing Checklist for Patent Drawings in the Netherlands

Run this before the sheets leave your office. It is short because the Dutch requirements are short — and that brevity is exactly why sets fail: there is no hundred-page manual to remind you.

1. Route confirmed. Direct national filing, or European patent via the EPO? There is no PCT national phase into the Netherlands.
2. A4, one side only, 21 × 29.7 cm, on durable, white, matt, uncreased paper.
3. Margins: 2 cm top, 2.5 cm left, 2 cm right, 2 cm bottom. If the set also has to clear 37 CFR 1.84(g), build to 2.5 / 2.5 / 2 / 2.
4. One dark colour. Strong, evenly drawn lines. No colour. No photographs. No petition available.
5. Figure text stripped to the permitted labels, and those labels in the same language as the description. Check CAD title blocks and exported layer names.
6. Figures clearly separated and numbered consecutively. Every numeral in the description appears on a sheet; every numeral on a sheet appears in the description.
7. On the EP route: Dutch claim translation filed within three months of grant, proofed against the figures numeral by numeral.
8. Templates audited for the phrase “Rule 46 EPC”. Deleted 1 February 2023; cite the Decision of the President instead.

Where the file sits after grant is the thing to keep in mind through all of it. A Dutch patent emerges from the office without anyone having vouched for it. The first competent reader of your figures may well be a judge in The Hague, and by then the only thing you can argue from is the sheets you filed.

Get Dutch-Compliant Figures Before the File Closes for Good

PerspireIP prepares patent drawings in the Netherlands to Octrooicentrum Nederland format and to EPO format for the European route — working from CAD, engineering files, prototypes or rough sketches, with reference numerals reconciled against the description and the claims before anything is filed. Because a Dutch patent is granted unexamined, there is no second chance to tidy a set up.

Tell us the route and the deadline and we will tell you exactly what the sheets need. Talk to our drawing team or review the full scope of our patent drawing services.

Frequently Asked Questions