Patent 12370716

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

  • Min Kuang (Koppers Performance Chemicals Inc)
  • Jun Zhang (Koppers Performance Chemicals Inc)

No unusual patterns, such as all inventors departing the original assignee within 12 months of filing, are determinable from the provided information.

Original assignee

Koppers Performance Chemicals Inc. is the original assignee.
Based on the patent's subject matter (wood preservative compositions), their primary line of business appears to be in chemical solutions for wood preservation.
Their current status is operating, as they are the current assignee and there is pending litigation involving the patent.

Assignment timeline

A search of the USPTO Assignment Center for patent US12370716 shows no recorded assignments beyond the original assignment to Koppers Performance Chemicals Inc.. This indicates that Koppers Performance Chemicals Inc. remains the current owner of the patent.

Timeline diagram

timeline
    title Ownership of US 12370716
    2025 : Filed by Koppers Performance Chemicals Inc
         : Issued to Koppers Performance Chemicals Inc
    2026 : PTAB case PGR2026-00023 filed

NPE / troll-pattern signals

  1. Shell-entity transfer — not present. The patent remains with the original assignee, Koppers Performance Chemicals Inc., which is an operating company that develops and supplies wood preservative systems and technologies.
  2. Known asserter in the chain — not present. Koppers Performance Chemicals Inc. is not identified as a known NPE.
  3. Repeat correspondent across the chain — not present. There is only one recorded assignment (the original assignment to Koppers Performance Chemicals Inc.), so no recurrence of correspondents can be observed.
  4. Cascading transfers — not present. No transfers have been recorded.
  5. Pre-litigation transfer — not present. The patent remains with the original assignee, and there is no record of a transfer preceding the PTAB case filing.
  6. Bankruptcy fire-sale — not present. There is no indication that Koppers Performance Chemicals Inc. has filed for bankruptcy.
  7. Privateering — not present. No transfers to an NPE for assertion on behalf of an operating company are recorded.
  8. Defensive aggregator (anti-NPE) — not present. The patent is currently held by Koppers Performance Chemicals Inc. and has not been transferred to a defensive aggregator.

Verdict

Insufficient data. The USPTO Assignment Center shows no recorded assignments for US12370716 beyond the initial assignment to Koppers Performance Chemicals Inc.. While there is pending litigation (PGR2026-00023), the absence of any transfer records prevents the identification of any NPE or troll-pattern signals.

USPTO Assignment Center search for US12370716

Generated 5/29/2026, 5:50:15 PM