Issued U.S. Patent No. 12,675,513 B1

Patented technology behind how Thanis reviews writing.

U.S. Patent No. 12,675,513 B1 describes a system for reviewing language against defined requirements, scoring the result, explaining why, and preserving a record that can be checked later. Thanis applies those ideas to writing review.

Patent
US 12,675,513 B1
Issued
July 7, 2026
Assignee
Obligra Group LLC
Inventor
Stephen Woodard

Official title: “Symbolic Containment Firewall for Audited Language.”

First page of U.S. Patent No. 12,675,513 B1, Symbolic Containment Firewall for Audited Language, issued July 7, 2026.
First page of the issued patent · United States Patent and Trademark Office
22
Pages
20
Claims
8
Drawing sheets
8
Patent figures

The issued patent documents the system through architecture diagrams, review flows, scoring logic, structured records, decision paths, and verification.

The model is one part of the review.

What the patent describes

Figure 1 places the language model inside a larger review system. The draft carries context, moves through structured analysis, and produces a defined result rather than relying on the model alone.

Your draftcarries review contextThanis review systemworks with AI analysisStructured feedbackStored record
Simplified visualization based on Fig. 1 of U.S. Patent No. 12,675,513 B1. View original figure →
How Thanis uses it

Thanis Studio starts with your draft and the kind of review you want. Instead of returning an open-ended chat response, Thanis organizes the feedback into a consistent review.

thanis.ai/studio
Thanis Studio with a real history essay open for Academic review — the draft on the left, category scores and the written summary on the right.
Thanis Studio — a real draft, the review mode, and the result side by side.
See it in practice
Draft — the demo History Essay in Studio

The quest for knowledge for knowledge's sake is an inherent part of mankind, and with this knowledge we are able to progress as a race through scientific advancements…

Thanis review
Review
Academic
Result
Category scores — Clarity 58, Structure 70, Mechanics 72, Evidence 52 — with a written summary.
Revision priority
The most critical issue is the absence of a falsifiable, arguable thesis.

From draft to feedback you can use.

What the patent describes

Figure 3 follows the review from the draft and its context through analysis, scoring, explanation, a decision, and a recorded result.

Draft + contextOrganize contextAnalyzeScoreExplainDecidepass · block · escalateRecordReturn result
Simplified visualization based on Fig. 3 of U.S. Patent No. 12,675,513 B1. View original figure →
How Thanis uses it

Thanis shows you how the draft scored, why it received those scores, and what deserves attention first.

Thanis score breakdown by category showing Clarity 58 Watch and Structure 70 Steady, each with a short explanation.
Category scores from a real Academic review — each score sits next to its reasoning.
See it in practice
Illustrative example
Draft

Social media has had a major negative effect on student achievement.

Thanis review
Category
Evidence
Observation
The claim is broad and needs support.
Revision focus
Add evidence or narrow the claim to what your sources establish.

Different writing gets a different review.

What the patent describes

Figure 4 describes different review requirements for different kinds of language. A research paper, a creative draft, and an executive memo do not need the same kind of review. The patent calls these sets of requirements domain profiles.

Review requirementsStructured reviewAcademicWriter ProExecutive
Simplified visualization based on Fig. 4 of U.S. Patent No. 12,675,513 B1. View original figure →
How Thanis uses it

Thanis applies the broader idea through three review experiences, each with its own requirements.

Academic

Academic reviews the assignment, rubric, evidence, structure, mechanics, and clarity before submission.

Thanis Academic setup — the Assignment Context step where a student pastes the prompt or uploads a rubric file.

The assignment and rubric become part of the review.

Writer Pro

Writer Pro reviews structure, pacing, tone, and where the draft loses momentum.

Thanis Writer Pro context setup — focus choices like pacing, dialogue, tone, and blind spots, plus feedback intensity.

You choose the focus, style, and depth of the review.

Executive

Executive reviews assumptions, recommendation strength, reasoning, risk, and ownership.

Thanis Executive reviewing a real consolidation recommendation memo while preparing recommendations.

The draft is a recommendation, so the review reads it that way.

This patent concept appears in Thanis through mode-specific review. The modes themselves are product experiences, not separately patented features.

See it in practice
Illustrative example
Academic · Draft

The policy was clearly ineffective because student performance declined.

Review focus — Evidence / reasoning

The sentence makes a causal claim. Show the evidence that connects the policy to the decline, or narrow the claim.

Writer Pro · Draft

She walked into the room and looked around. Everyone was quiet. She sat down and waited.

Review focus — Pacing

The sequence uses several similar actions in a row. Decide which detail carries the tension and give that moment more space.

Executive · Draft

We expect the program to deliver $8 million in savings next year.

Review focus — Critical assumption

The projection depends on assumptions that are not stated. Identify what has to be true for the savings target to hold.

You decide what changes.

What the patent describes

The patent allows a review system to reflect on a result and, in some implementations, produce revised language.

How Thanis uses it

Thanis makes a deliberate product choice: it gives you the recommendation and the reasoning, then leaves the rewrite to you.

Thanis showing the reasoning behind a score and the recommendation to make a dependency explicit — with no rewrite applied to the draft.
The recommendation and the reasoning — the rewrite stays with you.
See it in practice
Illustrative example
Original draft

We'll make the call on the vendor and still hit the launch date.

Thanis recommendation
Recommendation
Clarify who owns the decision and what happens if the deadline slips.

You decide what changes and how to write it.

From the patent to Executive review.

What the patent describes

Figure 7 applies the system to a governance message. The draft makes an unconditional guarantee but leaves out important policy and risk context. The system flags the problem, reviews a revised version, scores it again, and records the final result.

Governance draftan unconditional guaranteeCheck required contextpolicy + riskRisk / guarantee flaggedInitial decisionblockedRevisionpolicy + risk addedRe-scoreFinal decisionpassRecordboth versions kept
Simplified visualization based on Fig. 7 of U.S. Patent No. 12,675,513 B1. View original figure →
How Thanis uses it

Thanis Executive applies that broader idea to leadership communication by surfacing assumptions, recommendation strength, weak reasoning, risk, and unclear ownership before the message moves forward.

Thanis Executive revision priority: make the dependency explicit and state what changes if the assumption fails.
The revision priority — the assumption the memo leans on.
Thanis Executive reading a real consolidation recommendation memo.
The recommendation, as written.
See it in practice
Illustrative example
Executive draft

We guarantee the rollout will remain on schedule and within budget.

Thanis Executive
Critical assumption
The statement depends on delivery milestones and cost assumptions that are not stated.
Revision focus
State the dependencies and what changes if they are missed.

A review you can return to.

What the patent describes

The patent treats the review as a structured record rather than a temporary model response. It also describes mechanisms for checking the integrity of that record later.

Stored recordRetrieveRebuildits original formRecompute + compare sealVerified / not verified
Simplified visualization based on Fig. 8 of U.S. Patent No. 12,675,513 B1. View original figure →
How Thanis uses it

Thanis lets you save reviews and return to your work through History.

A real Thanis review on mobile with the Save button and the History tab visible in the app navigation.
A real review on mobile — Save and History are part of the app.
See it in practice
  1. Draft 1
  2. Review saved
  3. Draft revised
  4. Return through History

The patent describes additional integrity and verification mechanisms beyond the user-facing History experience shown here.

The patent, on record.

Patent
U.S. Patent No. 12,675,513 B1
Title
Symbolic Containment Firewall for Audited Language
Application
19/416,176
Filed
December 11, 2025
Issued
July 7, 2026
Inventor
Stephen Woodard
Assignee
Obligra Group LLC, the company behind Thanis
Claims
20
Drawing sheets
8

U.S. Patent No. 12,675,513 B1 was filed December 11, 2025, issued July 7, 2026, and is assigned to Obligra Group LLC. It describes a system for reviewing language against defined requirements, scoring the result, explaining the reasoning, recording the review in a structured, sealed record, and verifying that record later.

Technology that supports review, not replacement.

Thanis turns structured analysis into something useful for the person doing the writing: clearer feedback, understandable scores, and a better idea of what to revise next.