STEP 1 · THE OFFICE ACTION ARRIVES
One office action, decomposed.
A non-final rejection enters the record — logged and sourced the moment it lands. Every rejection, reference, and deadline accounted for.
PURPLEBRAIN PATENT · FOR PATENT ATTORNEYS & AGENTS
AI your registration number can stand behind.
PurpleBrain Patent works with the AI you already use. It breaks applications, office actions, and prior art into sourced pieces — every assertion anchored to spec, claim, or reference — and runs an examiner-grade adversarial review before anything carries your signature.
Applications & claims
Office actions
Prior art
IDS & declarations
PTAB appeals
THE STAKES
The examiner has AI now. Your filings answer to it.
37 C.F.R. §11.18
the certification you make on every paper — AI or no AI, the accuracy is yours
1,300+
court cases where judges flagged AI-fabricated authority, and counting. Prosecution's version — unsupported claim language, misquoted references — surfaces later, as inequitable conduct
Source-traceable
as the USPTO brings AI into examination, filings built from source-anchored pieces meet it on its own terms — every assertion tied to where it came from
The question isn't whether AI helps you draft. It's whether anything unsupported survives to your signature.
HOW IT WORKS
Watch an office action get answered.
Scroll to follow one rejection from the mailbox to a response you can sign.
STEP 2 · REJECTIONS, WITH RECEIPTS
Every rejection becomes a claim you can answer.
Each one carries its statute, its references, and its exact page. Not summaries — receipts.
STEP 3 · THE SUPPORT GATE
Unsupported words get caught here.
A proposed amendment reads well — but the specification doesn't teach it. Most tools would file it. This one stops.
STEP 4 · THE PRACTITIONER DECIDES
Your judgment, on the record.
The amendment is rewritten in the words the spec actually teaches. The unsupported term is retired — visibly, with the decision preserved.
STEP 5 · A RESPONSE YOU CAN SIGN
Every argument carries its cite.
The response assembles from supported language only — spec paragraphs, reference columns, exact lines. Then it waits for the only thing that matters: your signature.
NO NEW PLATFORM
Your AI. Your subscription. Your data.
PurpleBrain Patent is not another platform, and it doesn't bundle the AI into an opaque fee. The AI is the subscription you already pay for — you know that cost to the dollar. Your PurpleBrain seat buys the discipline around it: the checks, the sign-offs, the receipts. Two line items you can read — so your pricing stays transparent. And your files stay where your engagement's terms already live, fully portable — no new vendor holding your clients' unfiled inventions.
It works with Claude and Gemini today — both with million-token context windows, so a full file wrapper fits in a single pass. ChatGPT and Copilot are next: the core routes by provider, so each new assistant is an addition, not a rewrite.
The USPTO itself is moving the same direction: its examiner-side AI requires every suggestion to be traceable to a source. A prosecution built on source-anchored pieces meets the examination process on its own terms.
A platform asks you to move in. PurpleBrain works with what you already use.
The platform model
- A new vendor, holding your clients' unfiled inventions in its vault
- Per-seat platform pricing on top of the AI you already pay for
- Verification you can't inspect
- Built for departments, priced like it
PurpleBrain Patent
- Your AI, your files, under your engagement's terms
- The support gate: claim words checked against your specification
- Every assertion traceable to spec, claim, or reference
- Two line items you can read — your AI, your seat
BUILT, NOT PITCHED
8,039
tests behind the system
9
adversarial readers, examiner-grade
13
prosecution protocols — office actions to PTAB appeals
Built inside live prosecution before the USPTO — provisionals, non-provisionals, same-day PCT filings, office-action strategy — not a demo lab.
What we don't do.
No unsupported claim language — every word checked against your spec
No invented references — authorities audited, AI-drafted summaries flagged
No filing without your sign-off
No new vault — files stay under your engagement's terms
GET STARTED
Bring us your toughest office action.
Book a working session — bring a live rejection or a hard application, and see it answered with every assertion tied to its source.
Not a practitioner? We work with a small number of serious inventors, by application.
Your message will be answered by a real person.
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Tell us what kind of knowledge is scattered, where it lives, and what your team needs to answer.
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