Patent 8268847

Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

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Ownership chain (1)

Asserters network →

Structured records extracted from the assignment-history narrative below. Each entity links to its full ownership-network profile.

  1. 2012-08-15 · recorded 2012-08-29 · reel 028787/0964 · Assignment

    CLOZEL, MARTINEACTELION PHARMACEUTICALS LTD.

    Correspondent: · MCDONNELL BOEHNEN HULBERT & BERGHOFF

    internal reorg

Assignment history

Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.

✓ Generated

Inventors

Original assignee

Actelion Pharmaceuticals Ltd. is a pharmaceutical company that focused on the discovery, development, and commercialization of treatments for orphan diseases. They shipped products embodying the claims, specifically in the field of endothelin receptor antagonists. Actelion Pharmaceuticals Ltd. was acquired by Johnson & Johnson in June 2017.

Assignment timeline

  • 2012-08-15 (executed) / recorded 2012-08-29 — Reel 028787/0964
    • Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST
    • Assignor: CLOZEL, MARTINE
    • Assignee: ACTELION PHARMACEUTICALS LTD.
    • Correspondent: MCDONNELL BOEHNEN HULBERT & BERGHOFF LLP
    • Context: Internal reorg (transfer from inventor to assignee)

Timeline diagram

timeline
    title Ownership of US 8268847
    2007 : Filed by Actelion Pharma
    2012 : Issued
    2012 : Assigned to Actelion Pharma
    2017 : Actelion acquired by J&J

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The patent remains with an operating company (Actelion Pharmaceuticals Ltd, which was later acquired by Johnson & Johnson).
  2. Known asserter in the chain — not present. Neither Actelion Pharmaceuticals Ltd nor Johnson & Johnson are known NPEs.
  3. Repeat correspondent across the chain — unclear. The correspondent for the inventor assignment is MCDONNELL BOEHNEN HULBERT & BERGHOFF LLP. Without tracking other patents or specific assertion lists for this firm, recurrence cannot be determined from the provided data.
  4. Cascading transfers — not present. Only one assignment from the inventor to the original assignee is recorded.
  5. Pre-litigation transfer — unclear. No litigation information is available within the provided patent text to determine if any assignments occurred prior to a suit.
  6. Bankruptcy fire-sale — not present. Actelion Pharmaceuticals Ltd was acquired by Johnson & Johnson, not dissolved due to bankruptcy.
  7. Privateering — not present. The patent remains with the operating company (or its acquirer).
  8. Defensive aggregator (anti-NPE) — not present. The patent is not currently assigned to a defensive aggregator.

Verdict

Insufficient data. Only one assignment from the inventor to the original assignee is recorded (Reel 028787/0964, executed 2012-08-15). This single transfer is a standard procedural assignment and does not provide enough information to identify any NPE or patent-troll patterns. The patent remains with the original operating company or its acquirer.

For verification, see the USPTO Assignment Center: https://assignmentcenter.uspto.gov/

Generated 5/17/2026, 6:47:59 AM