Claim Drafter

Claim Drafter is an AI-powered patent claim drafting tool that thinks like a European patent attorney. It guides you through structured claim generation with built-in legal logic checks, antecedent basis requirements, and claim dependency rules. Works in any language.

How It Works

Step-by-Step Guided Drafting

Claim Drafter walks you through a structured claim drafting process:

  1. Problem Determination: Analyze your invention disclosure to identify the technical problem solved
  2. Draft Claim 1: Build your broadest independent claim
  3. Draft Independent Claims: Develop additional independent claims covering different aspects
  4. Extend to 15 Claims: Build a comprehensive dependent claim tree
  5. Extend Further: Add many more claims, based on the invention disclosure. These can be used as fallback in the description.
  6. Add Reference Numbers: Insert reference numerals coordinated with your figures
  7. Generate Drawings: Create patent drawings directly from your claims
  8. Convert Color Drawings: Transform color drawings into patent-compliant black and white

Model Selection

Choose the AI model that best fits your needs:

  • Gemini 3 Pro: Recommended for most claim drafting tasks
  • GPT-5.1: Alternative with different reasoning patterns
  • Opus 4.5: Most sophisticated reasoning

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

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

Confidentiality

We have zero access to your inputs or outputs. Your invention disclosures stay confidential:

  • 23VIP has no access to your patent data—processing happens directly between you and the LLM
  • We use LLM APIs under business terms that prohibit training on your data
  • We have a zero data retention agreement with Anthropic (Claude)
  • GDPR compliant—application and databases hosted in Europe

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

Use Cases

New Application Drafting

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

  • Multiple independent claims covering different aspects
  • 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
  • Download as SVG (editable in PowerPoint)
  • Convert color images to patent-compliant black and white
  • B/W conversion options: Gemini 2.5 Flash or OpenAI GPT-Image-1
  • Generate 3 style variations to choose your preferred look
  • Automatic reference numeral coordination

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 (80 EUR) for 24-hour unlimited use
  • Credits: 1 credit = 200 EUR

No subscription required—pay only for what you use.

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. We use LLM APIs under business terms that prohibit training on your data, and we have zero access to your inputs or outputs.

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 or type directly. Structured IDFs work best, but the tool handles various input formats.

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 I choose which AI model to use?

Yes. You can use the default optimized settings, or select a specific model (Claude, GPT, or Gemini) based on your preference. You can also chat with your results to refine 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 Compare to ChatGPT