Patent 11673805

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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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

  • Sophia SCHMIDT (LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude)
  • Teja Schmid McGuinness (LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude)

Original assignee

LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude (referred to as L'Air Liquide SA) is the original assignee. L'Air Liquide SA is a French multinational company that supplies industrial gases and services to various industries, including hydrogen production. As such, they produce and ship products embodying the claims of this patent. The company is currently operating.

Assignment timeline

There are no assignment records for US patent 11673805 found on the USPTO Patent Assignment Search database. This indicates that the original assignee, L'Air Liquide SA pour l'Etude et l'Exploitation des Procedes Georges Claude, still owns the patent.

Timeline diagram

timeline
    title Ownership of US 11673805
    2020 : Priority date
    2021 : Filed by LAir Liquide SA
    2023 : Issued to LAir Liquide SA

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The patent remains with the original operating company, L'Air Liquide SA, which is a large multinational industrial gas company.
  2. Known asserter in the chain — not present. L'Air Liquide SA is not identified as a known Patent Assertion Entity (PAE) or "patent troll" in the provided search results. Known asserters include companies like Intellectual Ventures, MPHJ Technology, Vringo, Innovatio IP Ventures, Round Rock Research, and Wi-LAN.
  3. Repeat correspondent across the chain — not present. Since there are no recorded assignments, there is no chain to observe for recurring correspondents.
  4. Cascading transfers — not present. There are no recorded assignments for this patent.
  5. Pre-litigation transfer — not present. There are no recorded assignments and no indication of litigation by the patent owner.
  6. Bankruptcy fire-sale — not present. The original assignee is currently operating and no bankruptcy records were found.
  7. Privateering — not present. There is no evidence of L'Air Liquide SA transferring the patent to an NPE for assertion on its behalf.
  8. Defensive aggregator (anti-NPE) — not present. The patent is still held by the original operating company, L'Air Liquide SA. Defensive aggregators like Allied Security Trust (AST), LOT Network, and Open Invention Network (OIN) acquire patents to mitigate patent risk for their members and typically do not assert patents themselves.

Verdict

Insufficient data. There are no recorded assignment activities for US patent 11673805 after its issuance. The patent remains with the original assignee, L'Air Liquide SA pour l'Etude et l'Exploitation des Procedes Georges Claude, a large operating company in the industrial gas sector. Without any transfer records, it's not possible to identify any NPE or troll-pattern signals.

USPTO Assignment Center search page: https://assignmentcenter.uspto.gov/

Generated 5/19/2026, 12:46:43 AM