Patent 12221638

Litigation summary

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

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PTAB activity (1)

AIA trial proceedings — IPR, PGR, CBM — filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced directly from the PTAB Trial API.

  • IPR2026-00176IPRfiled Dec 10, 2025vs. Halozyme, Inc.Institution Denied

Cached for 24 hours. Status strings are sourced verbatim from the PTAB API; the colored badge is our heuristic classification.

Cases on file (1)

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Specific litigation cases in our database that name US patent 12221638. 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

As of April 26, 2026, there is known litigation involving US patent 12221638:

  1. Case Type: PTAB Inter Partes Review (IPR)
    • Case Number: IPR2026-00176
    • Jurisdiction: Patent Trial and Appeal Board (PTAB) of the USPTO
    • Filing Date: (Not explicitly stated in the provided text for this specific PTAB case, but the patent states it was "filed (Pending)").
    • Plaintiff(s): Petitioner (details not available in the provided patent text, but typically Unified Patents is a petitioner for such cases, as indicated by the link to Unified Patents portal).
    • Defendant(s): Alteogen Inc. (assignee of the patent).
    • Status: Pending.

Additionally, the patent indicates "Family has litigation" with "First worldwide family litigation filed," linking to Darts-ip.com. However, the details of this worldwide family litigation (plaintiff, defendant, jurisdiction, case number, filing date, and outcome/status) are not provided within the given patent text or the search snippets.Known litigation involving US patent 12221638 includes:

  1. Case Type: Inter Partes Review (IPR) before the Patent Trial and Appeal Board (PTAB)
    • Case Number: IPR2026-00176
    • Jurisdiction: Patent Trial and Appeal Board (PTAB)
    • Filing Date: Not explicitly stated in the provided text.
    • Plaintiff(s): Petitioner (not specified in the provided text).
    • Defendant(s): Not specified in the provided text, but typically the patent owner (Alteogen Inc.) would be the respondent.
    • Status: Pending.

The patent also indicates that the "Family has litigation" and that the "First worldwide family litigation filed" is linked to Darts-ip.com. However, specific details regarding this worldwide litigation (plaintiff(s), defendant(s), jurisdiction, case number, filing date, and outcome or current status) are not available in the provided text.

Generated 5/27/2026, 6:46:43 PM