Claim Drafter — AI Patent Claim Drafting

Claim Drafter is a patent claim drafting tool that lets you choose your model path: open-source Qwen and Mistral hosted in the EU, or frontier models (Gemini, GPT, Claude). Flux handles drawing conversion, and both model paths are used under terms that prohibit training on your data. The drafting workflow thinks like a European patent attorney and works in any language.

How It Works

Step-by-Step Guided Drafting

Claim Drafter walks you through a structured claim drafting process:

Problem Determination: Analyze your invention disclosure to identify the technical problem solved
Draft Claim 1: Build your broadest independent claim
Draft Independent Claims: Develop additional independent claims covering different aspects, including cross-category references where appropriate
Extend to 15 Claims: Build a comprehensive dependent claim tree
Extend Further: Add many more claims, based on the invention disclosure. These can be used as fallback in the description.
Add Reference Numbers: Insert reference numerals coordinated with your figures
Generate Drawings: Create patent drawings directly from your claims
Convert Color Drawings: Transform color drawings into patent-compliant black and white
Add Reference Numbers to Drawings: Place reference-numeral call-outs directly onto a drawing image, with a manual editor and an AI-assisted review pass
Edit Pictures: Chat-based editing for any uploaded picture, independent of the claim drafting workflow
Convert for Another Jurisdiction: Rewrite an existing claim set to another patent office's formal requirements

The last four are independent modes: you can use them directly on existing material without going through the drafting workflow.

Model Selection

Claim Drafter offers two model families side by side:

Qwen 3.5 122B: EU-hosted open-source option for claim drafting
Mistral Small 4 119B: EU-hosted open-source option with stronger reasoning mode selection
Gemini, GPT, Claude: Frontier options, selectable where account policy allows

You can also chat with your results to refine and improve them interactively.

Expert Drafting Options

Advanced options give experienced drafters more control over how a claim set is produced:

Drafting Profile: Choose Fast, Balanced, or Thorough depending on how much time you want the model to spend
Enhanced-Accuracy Mode: An optional higher-accuracy mode for high-stakes claim 1 drafting, for cases where the extra processing time is worth it
Two-Part Claim Format: Toggle two-part ("characterised in that") claim format on or off
Chemistry Mode: A drafting mode tuned for chemistry claims

Any Input, In Any Format

Claim Drafter is not limited to typed text:

Document Upload: Attach PDF, Word, or PowerPoint files alongside or instead of typed text on every main drafting mode
PDF Chat: Ask questions directly about an uploaded reference PDF
Voice Dictation: Every chat box and free-text field has a microphone button, transcribed by an EU-hosted speech-to-text service

Built-In Patent Logic

Feature	What It Does
Antecedent Basis Checking	Ensures every element is properly introduced before reference
Dependency Validation	Confirms dependent claims properly narrow their base claims
Terminology Consistency	Flags inconsistent language across claim set

Why Patent Attorneys Choose Claim Drafter

Control Over Output

Unlike "black box" AI tools, Claim Drafter keeps you in control:

Guide the AI at each step
Accept, modify, or reject suggestions
Build claims iteratively rather than hoping for a good result
Every AI-proposed chat edit is shown as a track-changes-style review—accept, reject, or reset each change before it's applied

Confidentiality

Claim Drafter keeps your invention disclosures confidential on both model paths:

Qwen, Mistral, and Flux form the EU-hosted open-source path
Both paths are configured not to train on your data
Frontier models (Gemini, GPT, Claude) are the second path and can be disabled by user or organization policy
Claim Drafter is designed to prevent internal access to your inputs and outputs
The same principles apply to saved projects and uploaded pictures—stored under your account and handled under the same access limits as everything else in the tool
Designed with GDPR requirements and European hosting considerations in mind—23VIP is a Belgian company with European hosting for the application layer

Save & Resume Your Work

Claim Drafter saves your progress as you go:

Continuous autosave—no manual save step
Keep multiple saved projects, and create new ones, rename, duplicate, or delete them as needed
Reopen a project later with your claims, drawings, and figure set intact

Speed Without Sacrifice

Generate comprehensive claim sets in minutes rather than hours:

First draft independent claim in under 5 minutes
Complete claim tree development in 20-30 minutes
More time for strategic thinking, less time on structure
Live progress indicators show what stage a longer operation is at, rather than leaving you guessing

Use Cases

New Application Drafting

Start with an invention disclosure and build a complete claim set:

Multiple independent claims covering different aspects, including claims that refer back across categories where appropriate
Comprehensive dependent claim trees
Consistent terminology throughout
Consistent reference numbers

Drawing Generation

Create patent-compliant drawings directly from your claims:

Generate schematic drawings based on claim elements
Interactive editing: drag-and-drop elements, resize shapes, modify text
Generate as SVG (editable in PowerPoint) or as PNG using an AI/commercial image model
Browse multiple generated figures with Prev/Next navigation
Request further changes via chat, with undo
Convert color images to patent-compliant black and white
B/W conversion offers an EU-hosted open-source model path
Gemini and OpenAI are frontier alternatives where enabled
Generate 3 style variations to choose your preferred look, or generate 3 full versions to compare side by side
A "Remove wording" option cleanly strips existing text and reference numbers so you can add your own
Regenerate a single figure, or compare it against the original, without redoing the whole batch
Select several figures and apply one chat instruction to all of them at once
Automatic reference numeral coordination

Reference Number Placement

Place reference-numeral call-outs directly onto a drawing image, separately from inserting numbers into claim text:

Drag numbers and their leader lines by hand
Straight, curved, or double-curved leader styles, with arrowhead options
Underline a number directly on a feature instead of drawing a leader to it
Group several features under one number with curly-brace notation
Select multiple numbers at once to move, delete, or copy them as a group
Adjust reference-number size and leader-line thickness
An AI review pass checks the placement and applies smart, uncluttered corrections that automatically adapt to your figure
Undo at every step

Picture Editing

Edit any uploaded picture with AI chat, independent of the claim drafting workflow:

Extract individual pictures from an uploaded PDF, Word, or PowerPoint file into a staging tray
Edit one picture, or select several and apply one instruction to all of them at once
Undo
Send edited pictures on to black-and-white conversion, reference-number placement, or straight into your exportable figure set

Building Your Figure Set

Figures collected across the drawing modes can be arranged and exported as a set:

Drag figures to reorder them
Automatic figure labels (e.g. "Fig. 3A"), or set your own
Export as a formatted Word document—A4, one figure per page, styled captions and page header, with an option for sideways pages
Or export as a .zip archive of image files

Jurisdiction Conversion

Adapt an existing claim set to another patent office's formal requirements:

Supports US, EPO, China, Japan, South Korea, Canada, Brazil, India, Australia, Mexico, Singapore, and Indonesia
Applies each jurisdiction's claim-format rules (dependency style, multiple dependencies, category conventions, two-part form where required)
Choose the output language: same as your input, English, or the language required by the target jurisdiction
Shows the rules applied and an excess-claim fee summary for your claim count (e.g. above 20 claims in the US, 15 at the EPO, 10 in China)
Refine the converted set interactively via chat, like every other mode

What Users Say

"The best claim generation I've tested so far based on an extensive IDF."
— F.D., Patent Engineer

"I appreciate how this tool clearly reflects a rigorous thought process akin to that of a seasoned European patent attorney."
— Bastian Best, European Patent Attorney, BESTPATENT

"I was positively surprised — the reasoning gives me new views and ideas I wouldn't have had otherwise."
— K.H., European Patent Attorney

Pricing

Claim Drafter uses 23VIP's credit system:

Cost: 0.4 credits (40 EUR) for 24-hour unlimited use
Credits: 1 credit = 100 EUR

Pay-per-use requires no subscription. Or subscribe: €199/attorney/month (or €1,999/year — about 2 months free) for unlimited use of all three 23VIP tools. See full pricing.

Frequently Asked Questions

How is Claim Drafter different from ChatGPT?

Claim Drafter is purpose-built for patent claims and thinks like a European patent attorney. It includes antecedent basis checking, claim dependency validation, and patent-specific guidance that general LLMs lack. Unlike generic tools, 23VIP lets you choose between open-source models hosted in Europe and frontier models, with training on your data prohibited on both paths.

Can I use Claim Drafter for EPO applications?

Yes. Claim Drafter is designed with European patent practice in mind. It generates claims suitable for EPO, PCT, and other jurisdictions, and works in any language.

What input format do I need?

Claim Drafter accepts text-based invention disclosures. You can paste from documents, type directly, or upload a PDF, Word, or PowerPoint file. Structured IDFs work best, but the tool handles various input formats. Every chat box and text field also has a microphone button for voice dictation.

How long does it take to generate a claim set?

Initial independent claims generate in minutes. A complete claim tree typically takes 20-30 minutes of guided development, compared to several hours manually.

Can it convert claims between jurisdictions?

Yes. The Convert for Another Jurisdiction mode rewrites an existing claim set to the formal requirements of a target patent office (US, EPO, China, Japan, South Korea, Canada, Brazil, India, Australia, Mexico, Singapore, or Indonesia). It shows which rules were applied, estimates excess-claim fees for your claim count, and can output the claims in your input language, in English, or in the language required by the target jurisdiction.

Can I choose which AI model to use?

Yes. You choose between the EU-hosted open-source model stack (Qwen, Mistral) and frontier models (Gemini, GPT, Claude), where your account policy allows them.

Try Claim Drafter Free

Experience AI-assisted claim drafting with a free trial. See how Claim Drafter can improve your workflow.

Request Free Trial Dependent Claim Guide Compare to ChatGPT