Agent skill

Patent Claims Analyzer

by RobThePCGuy in RobThePCGuy/Claude-Patent-Creator

Automated analysis of patent claims for USPTO compliance with 35 USC 112(b) requirements - antecedent basis, definiteness, claim structure

MITAuto-check passedLegal & Compliance

Install Patent Claims Analyzer

skills CLI
$ npx skills add RobThePCGuy/Claude-Patent-Creator --skill patent-claims-analyzer -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install RobThePCGuy/Claude-Patent-Creator patent-claims-analyzer --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/RobThePCGuy/Claude-Patent-Creator.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/patent-claims-analyzer .claude/skills/patent-claims-analyzer && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
patent-claims-analyzer
GitHub stars
196
Token cost
~1.2k tokens
SKILL.md length
319 words
Files
1
Skills in repo
17
Repo updated
First seen
Licence
MIT

At a glance

Automated analysis of patent claims for USPTO compliance with 35 USC 112(b) requirements - antecedent basis, definiteness, claim structure

  • Works in 4 steps: Antecedent Basis Checking → Definiteness Analysis (35 USC 112(b)) → Claim Structure Validation → …
  • Tasks that involve Intellectual property
  • SKILL.md covers When to Use, What This Skill Does, Required Data and How to Use, plus 5 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Patent Claims Analyzer is an agent skill from RobThePCGuy/Claude-Patent-Creator. Automated analysis of patent claims for USPTO compliance with 35 USC 112(b) requirements - antecedent basis, definiteness, claim structure

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Legal & Compliance, covering Intellectual property. The repository describes itself as: USPTO patent creation system with MCP server + Claude Code plugin. Hybrid RAG search over MPEP/USC/CFR, BigQuery access to 76M+ patents, automated 35 USC 112 compliance checks… The licence is MIT.

When your agent uses it

  • Tasks that involve Intellectual property

Example prompts

  • “/patent-claims-analyzer”

Requirements

  • Python 3

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Antecedent Basis Checking
  2. Definiteness Analysis (35 USC 112(b))
  3. Claim Structure Validation
  4. Issue Categorization

What it can do on your machine

Read from SKILL.md and the folder at commit a089731. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are python).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Patent Claims Analyzer loads about 1.2k tokens when it runs. Until then it costs about 40 tokens; SKILL.md has 319 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~40
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from RobThePCGuy/Claude-Patent-Creator at commit a089731, republished under its MIT licence (© RobThePCGuy). 319 words, ~1,172 tokens.

Download SKILL.mdSave it as .claude/skills/patent-claims-analyzer/SKILL.md (or your agent's skills folder).
name
patent-claims-analyzer
description
Automated analysis of patent claims for USPTO compliance with 35 USC 112(b) requirements - antecedent basis, definiteness, claim structure
tools
Bash, Read, Write
model
sonnet

Patent Claims Analyzer Skill

Automated analysis of patent claims for USPTO compliance with 35 USC 112(b) requirements.

When to Use

Invoke this skill when users ask to:

  • Review patent claims for definiteness
  • Check antecedent basis in claims
  • Analyze claim structure
  • Find claim drafting issues
  • Validate claims before filing
  • Fix USPTO office action issues related to claims

What This Skill Does

Performs comprehensive automated analysis:

  1. Antecedent Basis Checking:

    • Finds terms used without prior introduction
    • Detects missing "a/an" before first use
    • Identifies improper "said/the" before first use
    • Tracks term references across claims
  2. Definiteness Analysis (35 USC 112(b)):

    • Identifies subjective/indefinite terms
    • Detects relative terms without reference
    • Finds ambiguous claim language
    • Checks for clear claim boundaries
  3. Claim Structure Validation:

    • Parses independent vs. dependent claims
    • Validates claim dependencies
    • Checks claim numbering
    • Identifies claim type (method, system, etc.)
  4. Issue Categorization:

    • Critical: Must fix before filing
    • Important: May cause rejection
    • Minor: Best practice improvements

Required Data

This skill uses the automated claims analyzer from: Location: ${CLAUDE_PLUGIN_ROOT}/python\claims_analyzer.py

How to Use

When this skill is invoked:

  1. Load the claims analyzer:

    python
    import os
    import sys
    sys.path.insert(0, os.environ.get('CLAUDE_PLUGIN_ROOT', '.'))
    from mcp_server.claims_analyzer import ClaimsAnalyzer
    
    analyzer = ClaimsAnalyzer()
  2. Analyze claims:

    python
    claims_text = """
    1. A system comprising:
        a processor;
        a memory; and
        said processor configured to...
    """
    
    results = analyzer.analyze_claims(claims_text)
  3. Present analysis:

    • Show compliance score (0-100)
    • List issues by severity (critical, important, minor)
    • Provide MPEP citations for each issue
    • Suggest specific fixes

Analysis Output Structure

python
{
    "claim_count": 20,
    "independent_count": 3,
    "dependent_count": 17,
    "compliance_score": 85,  # 0-100
    "total_issues": 12,
    "critical_issues": 2,
    "important_issues": 7,
    "minor_issues": 3,
    "issues": [
        {
            "category": "antecedent_basis",
            "severity": "critical",
            "claim_number": 1,
            "term": "said processor",
            "description": "Term 'processor' used with 'said' before first introduction",
            "mpep_cite": "MPEP 2173.05(e)",
            "suggestion": "Change 'said processor' to 'the processor' or introduce with 'a processor' first"
        },
        # ... more issues
    ]
}

Common Issues Detected

  1. Antecedent Basis Errors:

    • Using "said/the" before "a/an" introduction
    • Terms appearing in dependent claims not in parent
    • Missing antecedent in claim body
  2. Definiteness Issues:

    • Subjective terms: "substantially", "about", "approximately"
    • Relative terms: "large", "small", "thin"
    • Ambiguous language: "and/or", "optionally"
  3. Structure Issues:

    • Means-plus-function without adequate structure
    • Improper claim dependencies
    • Missing preamble or transition

Presentation Format

Present analysis as:

CLAIMS ANALYSIS REPORT
======================

Summary:
- Total Claims: 20 (3 independent, 17 dependent)
- Compliance Score: 85/100
- Issues Found: 12 (2 critical, 7 important, 3 minor)

CRITICAL ISSUES (Must Fix):

[Claim 1] Antecedent Basis Error
  Issue: Term 'processor' used with 'said' before introduction
  Location: "said processor configured to..."
  MPEP: 2173.05(e)
  Fix: Change to 'the processor' or introduce with 'a processor' first

[Claim 5] Indefinite Term
  Issue: Subjective term 'substantially' without definition
  Location: "substantially similar to..."
  MPEP: 2173.05(b)
  Fix: Define 'substantially' in specification or use objective criteria

IMPORTANT ISSUES:
...

MINOR ISSUES:
...

Integration with MPEP

For each issue, the skill can:

  1. Search MPEP for relevant guidance
  2. Provide specific MPEP section citations
  3. Show examiner guidance on similar issues
  4. Suggest fixes based on USPTO practice

Tools Available

  • Read: To load claims from files
  • Bash: To run Python analyzer
  • Write: To save analysis reports

© RobThePCGuy, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/patent-claims-analyzer of RobThePCGuy/Claude-Patent-Creator.

Open the folder on GitHubat commit a089731

Compare with similar skills

Patent Claims Analyzer next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Patent Claims Analyzer compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Patent Claims Analyzer this skillRobThePCGuy/Claude-Patent-Creator196—~1.2kAutomated safety check: PassMIT
Paper to Chinese Patent DrafterYuan1z0825/nature-skills47k1 repos~1.1kAutomated safety check: PassApache-2.0
Paper To Cn Patentsnipp-zha/Paper-to-patent-Skill1061 repos~959Automated safety check: PassNone
Patent Examinegfodor/legal-skills393—~4.8kAutomated safety check: PassGPL-3.0
Patent Auditgfodor/legal-skills393—~2.9kAutomated safety check: PassGPL-3.0
Replica BrandJakeschincariol/replica-skill1.2k—~1.1kAutomated safety check: PassMIT

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Questions about Patent Claims Analyzer

What does Patent Claims Analyzer do?

Automated analysis of patent claims for USPTO compliance with 35 USC 112(b) requirements - antecedent basis, definiteness, claim structure. Patent Claims Analyzer is an agent skill from RobThePCGuy/Claude-Patent-Creator.

When should I use Patent Claims Analyzer?

Patent Claims Analyzer fits situations like: tasks that involve Intellectual property.

How do I install Patent Claims Analyzer in Claude Code?

Run `npx skills add RobThePCGuy/Claude-Patent-Creator --skill patent-claims-analyzer -a claude-code`. Or copy the skill folder (skills/patent-claims-analyzer in RobThePCGuy/Claude-Patent-Creator) into .claude/skills/patent-claims-analyzer in your project. Claude Code loads it when a task matches its description.

How do I install Patent Claims Analyzer in Codex?

Run `npx skills add RobThePCGuy/Claude-Patent-Creator --skill patent-claims-analyzer -a codex`. Or copy the skill folder (skills/patent-claims-analyzer in RobThePCGuy/Claude-Patent-Creator) into .agents/skills/patent-claims-analyzer in your project. Codex loads it when a task matches its description.

Can I use Patent Claims Analyzer in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add RobThePCGuy/Claude-Patent-Creator --skill patent-claims-analyzer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/patent-claims-analyzer, .gemini/skills/patent-claims-analyzer, .github/skills/patent-claims-analyzer and .opencode/skills/patent-claims-analyzer in your project.

What does Patent Claims Analyzer need to run?

SKILL.md names no scripts, command-line tools or credentials: Patent Claims Analyzer is instructions for the agent only. Our summary lists: Python 3.

Does Patent Claims Analyzer access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Patent Claims Analyzer safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Patent Claims Analyzer use?

Patent Claims Analyzer is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Patent Claims Analyzer use?

About 1.2k tokens (SKILL.md is roughly 4.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Patent Claims Analyzer?

Skills that share tags, products or a category with Patent Claims Analyzer: Paper to Chinese Patent Drafter (Yuan1z0825/nature-skills, 47k stars), Paper To Cn Patent (snipp-zha/Paper-to-patent-Skill, 106 stars), Patent Examine (gfodor/legal-skills, 393 stars) and Patent Audit (gfodor/legal-skills, 393 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Patent Claims Analyzer?

RobThePCGuy (a GitHub user) maintains it in RobThePCGuy/Claude-Patent-Creator, which has 196 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 6, 2026.

Source: RobThePCGuy/Claude-Patent-Creator on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.