Patent 9031581

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

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No PTAB proceedings on file. This patent has not been challenged through Inter Partes Review, Post-Grant Review, or Covered Business Method review at the USPTO. The absence is itself a signal — well-asserted patents eventually attract IPRs.

Cases on file (1)

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Specific litigation cases in our database that name US patent 9031581. The free-form analysis below may also discuss cases beyond this list.

Litigation summary

Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.

✓ Generated

Known litigation involving US patent 9031581 is indicated directly on the Google Patents page for US9031581, which is provided as authoritative text.

Contradiction Alert: The "Previously generated sections of this patent" stated, "No active litigation for patent US9031581 was found in the CAFC 2026 dockets based on the provided search results. The 'Scheduled Cases – May 2026' document lists other patent cases but does not mention US9031581." This statement contradicts the information found directly within the "Legal status (The legal status is an assumption and is not a legal conclusion...)" and "Family has litigation" sections of the authoritative Google Patents text provided, which explicitly lists several District Court cases for US9031581. The information directly from the Google Patents page is prioritized.

Based on the authoritative patent text provided, the following cases are identified:

  1. US case filed in Texas Western District Court

    • Jurisdiction: Texas Western District Court
    • Case Number: 7:26-cv-00068
    • Filing Date: Not explicitly provided in the patent text, but the case number "7:26-cv-00068" strongly suggests a filing year of 2026.
    • Plaintiff(s): Not specified in the patent text.
    • Defendant(s): Not specified in the patent text.
    • Outcome or Current Status: Not specified in the patent text.
    • Source URL: https://portal.unifiedpatents.com/litigation/Texas%20Western%20District%20Court/case/7%3A26-cv-00068 (The content of this URL is not accessible to provide further details.)

  2. US case filed in Texas Eastern District Court

    • Jurisdiction: Texas Eastern District Court
    • Case Number: 2:26-cv-00123
    • Filing Date: Not explicitly provided in the patent text, but the case number "2:26-cv-00123" strongly suggests a filing year of 2026.
    • Plaintiff(s): Not specified in the patent text.
    • Defendant(s): Not specified in the patent text.
    • Outcome or Current Status: Not specified in the patent text.
    • Source URL: https://portal.unifiedpatents.com/litigation/Texas%20Eastern%20District%20Court/case/2%3A26-cv-00123 (The content of this URL is not accessible to provide further details.)

  3. US case filed in Texas Eastern District Court

    • Jurisdiction: Texas Eastern District Court
    • Case Number: 2:26-cv-00122
    • Filing Date: Not explicitly provided in the patent text, but the case number "2:26-cv-00122" strongly suggests a filing year of 2026.
    • Plaintiff(s): Not specified in the patent text.
    • Defendant(s): Not specified in the patent text.
    • Outcome or Current Status: Not specified in the patent text.
    • Source URL: https://portal.unifiedpatents.com/litigation/Texas%20Eastern%20District%20Court/case/2%3A26-cv-00122 (The content of this URL is not accessible to provide further details.)

It should be noted that the Google Patents page also lists the legal status as "Expired - Lifetime" with an "Anticipated expiration" date of 2025-04-04. However, the presence of these cases filed in 2026 indicates that litigation activity exists despite the listed expiration, possibly related to alleged infringement that occurred before the expiration date.

Generated 6/3/2026, 6:46:43 PM