Asserter profile

ARCELORMITTAL

operating company2 patents now2 ever0 cases filed during tenure4 connections

Also seen as: ARCELORMITTAL S.A.

PTAB exposure

2of this entity’s patents have been challenged at PTAB (2 total proceedings). 2 had claims invalidated.

Final written decisions are public record. The invalidation grounds usually carry over as § 102 / § 103 ammunition in district court — see IPR estoppel.

Two-hop network

Edges marked ⚖️ overlap with at least one infringement suit filed during the receiving entity’s tenure with the patent. Bold-bordered = this entity. Red = NPE; orange = shell LLC; green = defensive aggregator; blue = operating company.

flowchart LR
    Narcelormittal["ARCELORMITTAL"]
    Nkefferstein_ronald["KEFFERSTEIN, RONALD"]
    Ndrillet_pascal["DRILLET, PASCAL"]
    Narcelormittal_france["ARCELORMITTAL FRANCE"]
    Nkefferstein_ronald_drillet_pascal["KEFFERSTEIN, RONALD, DRILLET, PASCAL"]
    Nspehner_dominique["SPEHNER, DOMINIQUE"]
    Nkefferstein_ronald -->|"2021 · Assignment · 11326227"| Narcelormittal
    Ndrillet_pascal -->|"2021 · Assignment · 11326227"| Narcelormittal
    Narcelormittal_france -->|"2021 · Assignment · 11326227"| Narcelormittal
    Narcelormittal_france -->|"2019 · Reassignment · 10961602"| Narcelormittal
    Nkefferstein_ronald_drillet_pascal -->|"2019 · Reassignment · 10961602"| Narcelormittal
    Nspehner_dominique -->|"2021 · Assignment · 11326227"| Narcelormittal_france
    Nspehner_dominique -->|"2019 · Reassignment · 10961602"| Narcelormittal_france
    classDef focal fill:#fef3c7,stroke:#92400e,stroke-width:3px,color:#1c1917
    classDef npe fill:#fee2e2,stroke:#be123c,stroke-width:2px,color:#1c1917
    classDef shell fill:#fed7aa,stroke:#9a3412,stroke-width:2px,color:#1c1917
    classDef defensive fill:#dcfce7,stroke:#15803d,stroke-width:2px,color:#1c1917
    classDef operating fill:#e0f2fe,stroke:#075985,stroke-width:1px,color:#1c1917
    class Narcelormittal focal
    class Narcelormittal_france operating

Patents currently held (2)

Connected entities (4)

Correspondent attorneys (1)

Attorneys / firms recorded with USPTO when this entity received a patent. Recurrence is the signal — many firms do both NPE and operating-company patent work, so a single appearance doesn’t mean much.

  • (no name)· MCDONNELL BOEHNEN HULBERT & BERGHOFF4 appearances