Patent 11072148

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. 2019-01-03 · recorded 2019-01-11 · reel 050308/0748 · ASSIGNMENT

    ROGERS, LUKE; YIALIZIS, STEVENSIGMA TECHNOLOGIES INT'L, LLC

    Correspondent: ALTAFARO, DANIEL E. · MUNCY, GEISSLER, OLDS & LOWE

    Initial assignment from inventors to the original assignee

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

The named inventors for US patent 11072148 are Steven Yializis and Luke Rogers. At the time of filing (January 3, 2019), both inventors were employed by Sigma Technologies Int'l LLC, as indicated by the assignment of their interest to the company on the same date.

Original assignee

The original assignee on the issued patent is Sigma Technologies Int'l LLC. The company is a leader in surface functionalization technologies, utilizing environmentally friendly non-solvent and non-water-based treatment and coating techniques to modify surfaces. Their products include radiant barrier materials for energy management, protective uniforms, packaging films, ultra-high barrier materials for OLED displays and solar cells, and polymer dielectrics for capacitive energy storage devices. The company appears to be an active, privately held corporation headquartered in Tucson, Arizona. They ship products embodying the claims, specifically radiant barrier materials and packaging films.

Assignment timeline

  • 2019-01-03 (executed) / recorded 2019-01-11 — Reel 050308/0748
    • Conveyance: ASSIGNMENT
    • Assignor: ROGERS, LUKE; YIALIZIS, STEVEN
    • Assignee: SIGMA TECHNOLOGIES INT'L, LLC
    • Correspondent: ALTAFARO, DANIEL E. (MUNCY, GEISSLER, OLDS & LOWE, P.C. P.O. BOX 1364 FAIRFAX, VA 22038). This correspondent does not recur in this chain.
    • Context: Initial assignment from inventors to the original assignee.

No further assignment records for US patent 11072148 were found on the USPTO Patent Assignment Search database.

Timeline diagram

timeline
    title Ownership of US 11072148
    2019 : Filed / Assigned to Sigma Technologies Int'l LLC
    2021 : Issued
    2024 : US litigation filed

NPE / troll-pattern signals

  1. Shell-entity transfer — Not present. The patent remains with the original operating company, Sigma Technologies Int'l LLC.
  2. Known asserter in the chain — Not present. Sigma Technologies Int'l LLC is an operating company that develops and manufactures products related to the patent's claims.
  3. Repeat correspondent across the chain — Not present. There is only one recorded assignment in the chain, making recurrence impossible.
  4. Cascading transfers — Not present. There is only one assignment recorded, which is the initial transfer from the inventors to the operating company.
  5. Pre-litigation transfer — Not present. The initial assignment from inventors to Sigma Technologies Int'l LLC occurred on January 3, 2019, while the first recorded litigation (a US case in Delaware District Court) was filed on May 17, 2024. This is well outside the 6-month pre-litigation window.
  6. Bankruptcy fire-sale — Not present. Sigma Technologies Int'l LLC is an active, operating company.
  7. Privateering — Unclear. There is no publicly available information to suggest that Sigma Technologies Int'l LLC is asserting this patent on behalf of another operating company.
  8. Defensive aggregator (anti-NPE) — Not present. The patent is not currently assigned to any known defensive aggregator.

Verdict

Operating-company assertion

This verdict is based on the fact that Sigma Technologies Int'l LLC, an active operating company engaged in the field of the patented technology, is the sole owner of record (Reel 050308/0748, recorded 2019-01-11) and is involved in active litigation concerning this patent. The presence of a US district court case (1:24-cv-01073 filed 2024-05-17) and an IPR (IPR2025-01143) indicates active assertion by the operating company.

For verification of assignment records, please refer to the USPTO Assignment Center: https://assignmentcenter.uspto.gov/

Generated 5/17/2026, 6:48:59 AM