US 9251531

A technical analysis of U.S. Patent 9,251,531 reveals the following details:

Title: File format and platform for storage and verification of credentials

Assignee: Cortex MCP Inc.

Inventor: Shaunt M. Sarkissian

Filing Date: March 12, 2013

Issue Date: February 2, 2016

Abstract:
The patent describes a computer-implemented method for generating and verifying officially verifiable electronic representations of credentials. The method involves a credential database that receives a request for a credential action. This database stores one or more credentials, each with a status indicator. The system determines a response to the credential action based on the stored user credentials and transmits this response to a client device.

Overview of Independent Claims:

This patent contains three independent claims which form the core of the invention. They are outlined in plain language below:

Independent Claim 1: This claim details a method for generating and verifying electronic credentials. It describes a system where a central credential database receives a request to either create or check the status of a digital credential. When a request to generate a new credential is made, the system checks if it already exists. If not, it requests the credential from an official issuing agency (like the DMV). This agency then sends back the credential information and its validity status. The system stores this new credential and sends a copy to the user's device, potentially linking it to that specific device for security. If the request is to verify an existing credential, the system checks the credential's status in its database and sends a response indicating whether it is valid or invalid, and sometimes includes a portion of the credential itself (like a photo).

Independent Claim 9: This claim focuses on the user's device (the client side) of the credential system. It outlines a method where a user's device generates a request for a credential action, such as creating a new credential or verifying an existing one. This request includes a unique identifier for the credential. The device then sends this request to the credential database and receives a response. If a new credential is created, the response will include the new digital credential, which may be tied to the specific device. If a verification request is made, the response will indicate the credential's status (valid or invalid) and may include additional information like a credential image or the reason for an invalid status.

Independent Claim 17: This claim describes the apparatus or the physical system that performs these actions. It specifies a system with a processor and a memory unit. The processor is programmed to manage the credential database, which stores credentials and their status indicators. This apparatus is designed to receive requests for credential actions, determine the appropriate response based on the stored data, and send that response back to the user's device. The process for generating and verifying credentials mirrors what is described in the first independent claim, covering the interaction with issuing agencies and the management of credential validity.

Litigation:

US Patent 9,251,531 has been the subject of litigation. Notably, the patent is mentioned in a case filed in the U.S. District Court for the Western District of Texas, Cortex MCP, Inc. v. Visa, Inc., as well as a case in the Northern District of California with the same parties. There are also records of related proceedings before the Patent Trial and Appeal Board (PTAB). The specific dockets for the Court of Appeals for the Federal Circuit (CAFC) for 2026 were not available in the provided search results.

Litigation History of U.S. Patent 9,251,531

As of May 11, 2026, U.S. Patent 9,251,531 ('531 patent) has been subject to litigation in U.S. District Courts and validity challenges at the Patent Trial and Appeal Board (PTAB).

District Court Litigation

1. Cortex MCP, Inc. v. Visa, Inc.

• Plaintiff: Cortex MCP, Inc.
• Defendant: Visa, Inc.
• Jurisdiction: Initially U.S. District Court for the Western District of Texas; transferred to U.S. District Court for the Northern District of California.
• Case Numbers: 6:23-cv-00048 (W.D. Tex.); 5:23-cv-05720 (N.D. Cal.).
• Filing Date: January 26, 2023 (in W.D. Tex.).
• Status: The case was transferred to the Northern District of California on November 3, 2023. On July 22, 2024, the court granted Visa's motion to stay the case pending the resolution of inter partes review (IPR) proceedings at the PTAB. A subsequent order extended the stay on February 19, 2026. The case remains stayed pending appeals of the PTAB decisions.

Patent Trial and Appeal Board (PTAB) Proceedings

Visa, Inc. filed multiple inter partes review (IPR) petitions challenging the validity of the claims of the '531 patent.

1. IPR2024-00486

• Petitioner: Visa Inc.
• Patent Owner: Cortex MCP Inc.
• Jurisdiction: USPTO Patent Trial and Appeal Board
• Filing Date: January 25, 2024.
• Outcome/Status: The PTAB instituted a review on August 2, 2024. In a Final Written Decision, the board found all challenged claims (1-20) unpatentable. The decision has been appealed to the U.S. Court of Appeals for the Federal Circuit (Case No. 26-1259).

2. IPR2024-00487

• Petitioner: Visa Inc.
• Patent Owner: Cortex MCP Inc.
• Jurisdiction: USPTO Patent Trial and Appeal Board
• Status: This case was consolidated with IPR2024-00486. The Final Written Decision finding the claims unpatentable applies to this proceeding as well.

Proceedings overview

There are two inter partes review (IPR) proceedings on file for US Patent 9,251,531, both of which resulted in the invalidation of all challenged claims. This gives a strong defensive posture for a defendant, as the core claims of the patent have been found unpatentable.

IPR2024-00486 — Visa Inc. v. Cortex MCP Inc.

• Type: Inter Partes Review
• Filed: 2024-01-25
• Status: Claims invalidated. The PTAB issued a Final Written Decision finding all challenged claims (1-20) unpatentable. This decision has been appealed to the U.S. Court of Appeals for the Federal Circuit.
• Judge panel: Not publicly available in the provided information.
• Petition grounds: All claims (1-20) were challenged under unspecified prior art and statutory bases (§ 102 / § 103).
• Institution decision: Instituted on 2024-08-02. The panel's reasoning for institution is not detailed in the provided information.
• Final Written Decision: Issued on an unspecified date. The board found all challenged claims (1-20) unpatentable. The specific reasoning for the unpatentability finding is not detailed in the provided information.
• Settlement / termination: No settlement or termination information is provided.
• Appeal: Yes, the Final Written Decision was appealed to the U.S. Court of Appeals for the Federal Circuit (Case No. 26-1259). The issues on appeal are not detailed in the provided information.
• Defensive value: All claims (1-20) of the patent were found unpatentable in this IPR. Any infringement theory built on these claims is significantly weakened, although the outcome of the Federal Circuit appeal is pending.

IPR2024-00487 — Visa Inc. v. Cortex MCP Inc.

• Type: Inter Partes Review
• Filed: Not explicitly stated in the provided information, but filed around the same time as IPR2024-00486.
• Status: Claims invalidated. This case was consolidated with IPR2024-00486, and the Final Written Decision finding claims unpatentable applies to this proceeding as well.
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Not explicitly stated in the provided information, but implicitly challenges claims 1-20 given the consolidation with IPR2024-00486.
• Institution decision: Not explicitly stated as a separate institution, but presumably instituted and consolidated with IPR2024-00486.
• Final Written Decision: The Final Written Decision finding claims 1-20 unpatentable in IPR2024-00486 applies to this consolidated proceeding.
• Settlement / termination: No settlement or termination information is provided.
• Appeal: The appeal to the Federal Circuit (Case No. 26-1259) of the consolidated decision applies to this proceeding.
• Defensive value: Similar to IPR2024-00486, all claims (1-20) of the patent were found unpatentable. This reinforces the defensive position, pending the outcome of the Federal Circuit appeal.

Strategic summary

Both IPR2024-00486 and IPR2024-00487, initiated by Visa Inc., resulted in the PTAB finding all claims (1-20) of US9251531 unpatentable. This means that currently, all claims of the patent are considered CANCELED by the PTAB. No claims were sustained, and no claims remain untested through these IPRs. The patent has been significantly narrowed, effectively removing all its asserted claims as valid, subject to the ongoing Federal Circuit appeal.

The estoppel landscape is critical here. Pursuant to 35 U.S.C. § 315(e)(2), Visa Inc. (and its privies) are estopped from asserting in a civil action or another USPTO proceeding that claims 1-20 are invalid on any ground that was raised or reasonably could have been raised in these IPRs. However, for a defendant who was not a petitioner or privy, the prior art grounds are still available. Given the PTAB's decision, any defendant facing assertion of this patent could leverage the PTAB's findings of unpatentability to argue against infringement.

The pattern signals indicate aggressive defensive action by Visa Inc., filing multiple IPRs that were subsequently consolidated. The patent owner, Cortex MCP Inc., has appealed the PTAB's Final Written Decision to the Federal Circuit, suggesting a strong commitment to defending the patent's validity. There is no information provided about a defensive aggregator like Unified Patents being in the chain for these specific IPRs.

Recommended next steps

If you are a defendant currently facing assertion of this patent, you should immediately review the Final Written Decision from IPR2024-00486 (which consolidated IPR2024-00487) because it found claims 1-20 unpatentable. This decision significantly undermines any infringement theory built upon these claims.

The Federal Circuit appeal (Case No. 26-1259) is ongoing. It is crucial to monitor the progress and outcome of this appeal, as it will determine the ultimate validity of the challenged claims. A reversal by the Federal Circuit would reinstate the claims, while an affirmance would solidify their unpatentability.

Inventors

The sole named inventor for US Patent 9,251,531 is Shaunt M. Sarkissian. At the time of filing, Shaunt M. Sarkissian was the inventor and subsequently assigned his interest to Cortex MCP Inc., which is also listed as the original assignee. No unusual patterns, such as inventors departing the original assignee shortly after filing, are discernible from the provided information.

Original assignee

The original assignee named on the issued patent is Cortex MCP Inc.

Based on available information, Cortex MCP Inc. does not appear to primarily ship products embodying the claims of the patent. Instead, it is widely identified as a patent assertion entity (PAE) or Non-Practicing Entity (NPE), with its primary line of business centered on patent licensing and enforcement. The company's current status, as evidenced by ongoing litigation, is operating as a patent assertion entity.

Assignment timeline

• 2013-03-08 (executed) / recorded 2014-07-11 — Reel 030067/0014
  • Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST
  • Assignor: SARKISSIAN, SHAUNT M.
  • Assignee: CORTEX MCP, INC.
  • Correspondent: ROBERT E. SHARKE, DENTONS US LLP, P.O. BOX 1304, CHICAGO, IL 60690.
  • Context: Inventor assigned patent rights to the original corporate assignee.

No further assignment records for US9251531 were found on the USPTO Patent Assignment Search beyond the initial assignment from the inventor to Cortex MCP, Inc.

Timeline diagram

timeline
    title Ownership of US 9251531
    2013 : Inventor assigned to Cortex MCP Inc
    2016 : Issued to Cortex MCP Inc
    2023 : First infringement suit filed

NPE / troll-pattern signals

1. Shell-entity transfer — Not present. The only recorded assignment is from the inventor to Cortex MCP, Inc., the original corporate assignee. While Cortex MCP, Inc. itself operates as a patent assertion entity, there is no record of the patent being transferred from an operating company to a separate licensing-only shell LLC.
2. Known asserter in the chain — Present. Cortex MCP Inc., the current owner of the patent (as assignee on 2014-07-11, Reel 030067/0014), is identified as a patent assertion entity by Unified Patents and RPX Corporation. It is also the plaintiff in the district court litigation involving this patent.
3. Repeat correspondent across the chain — Not present. Only one assignment is recorded for this patent, from the inventor to Cortex MCP, Inc. Thus, there is no recurrence of a correspondent across the chain. The correspondent for this single assignment was ROBERT E. SHARKE of DENTONS US LLP (Reel 030067/0014).
4. Cascading transfers — Not present. There is only one recorded assignment in the chain.
5. Pre-litigation transfer — Not present. The assignment from the inventor to Cortex MCP, Inc. was recorded on July 11, 2014 (Reel 030067/0014). The first infringement suit, Cortex MCP, Inc. v. Visa, Inc., was filed on January 26, 2023, approximately nine years after the assignment.
6. Bankruptcy fire-sale — Not present. There is no indication in the patent record or associated litigation context that the patent was acquired through bankruptcy proceedings.
7. Privateering — Unclear. While Cortex MCP, Inc. is an NPE, there is no public information indicating that an operating company transferred this patent to Cortex MCP, Inc. to assert on its behalf against competitors.
8. Defensive aggregator (anti-NPE) — Not present. The patent remains under the ownership of Cortex MCP, Inc., a known patent asserter, and has not been acquired by a defensive aggregator.

Verdict

NPE — high confidence

The verdict of NPE with high confidence is driven by the fact that Cortex MCP Inc., the sole corporate assignee (via assignment recorded 2014-07-11, Reel 030067/0014), is widely recognized by industry monitors like Unified Patents and RPX Corporation as a patent assertion entity. Furthermore, Cortex MCP Inc. is actively asserting this patent in litigation against Visa, Inc., as detailed in the litigation history provided.

(For verification, see USPTO Patent Assignment Search for US9251531: https://assignmentcenter.uspto.gov/patent/index.html)

To identify the most relevant prior art for US patent 9251531, I will examine the patent citations listed on the USPTO website for patent 9251531.

Most Relevant Prior Art for US Patent 9251531:

To provide a comprehensive analysis of the most relevant prior art for US Patent 9251531, it's necessary to access the full list of "Cited By" references directly from the USPTO patent database for patent 9251531. The provided patent text includes an "Other versions" section listing US20140181927A1, which is a publication of the same application. However, a detailed breakdown of the prior art cited against US9251531B2 is not present in the provided text.

The USPTO's "Enriched Citations" API, mentioned in the search results, would be ideal for this task as it provides bibliographic information, the claims cited against, and relevant sections relied upon by the examiner. Without direct access to this live data or a pre-compiled list of the examiner-cited prior art for US9251531B2, a definitive list of the most relevant prior art cannot be generated with specific claim anticipation details.

However, based on the description within US9251531B2, particularly the "BACKGROUND" section, the patent aims to address issues of fragmentation and insecurity in existing payment systems and the increasing need for secure digital identification as users move away from traditional wallets. Therefore, prior art in the following areas would be highly relevant:

• Secure digital transaction systems: Any systems predating the December 21, 2012 priority date (and March 12, 2013 filing date) that focused on secure digital payments or transactions would be relevant. The patent itself references U.S. patent application Ser. No. 11/851,215, entitled "SYSTEMS, METHODS, AND APPARATUSES FOR SECURE DIGITAL TRANSACTIONS," as describing an RCD payment platform. This specific application, while not explicitly called "prior art" within the '531 patent, is highly relevant as it describes a complementary or foundational technology.
• Electronic credential storage and verification: Prior art dealing with secure methods for storing and verifying electronic identification, loyalty cards, access cards, or other credentials on mobile devices would be pertinent.
• Information code (QR, barcode) based systems for transactions/verification: Any systems using scannable codes for payment, identification, or credential verification prior to the '531 patent's priority date.

To fully fulfill the request, a direct query to the USPTO's patent database for patent 9251531's cited prior art would be necessary.

I cannot perform an obviousness analysis of US Patent 9,251,531 under 35 U.S.C. § 103 based solely on the provided patent text.

The provided patent information on the Google Patents page for US9251531B2 lists "Prior art keywords" (credential, user, over file, over, stored) and a "Prior art date" (2012-12-21). However, it does not explicitly list specific prior art references (e.g., other patent numbers, publications, or non-patent literature) that were cited against the patent or that would be used in an obviousness analysis. The "CROSS-REFERENCE TO RELATED APPLICATION" section mentions U.S. provisional patent application No. 61/740,731, filed December 21, 2012, which serves as a priority document for US9251531, not as prior art against it.

Without a list of specific prior art documents, it is not possible to "Identify combinations of prior art references that would render the claims obvious, and explain why a person having ordinary skill in the art would have been motivated to combine them," as requested.