Patent 11812895

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 (2)

Asserters network →

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

  1. 2022-08-29 · reel 061355/0271 · Assignment

    Beaumont, AmyTHE GREASE BOX LLC, ARIZONA

    transfer-of-inventor's-interest

  2. 2023-10-04 · recorded 2023-10-05 · reel 065137/0603 · Assignment

    HILLMAN, MARKUS DALETHE GREASE BOX LLC, ARIZONA

    transfer-of-inventor's-interest

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

  • Amy Beaumont: Employer at time of filing not determinable from the patent document.
  • Markus Dale Hillman: Employer at time of filing not determinable from the patent document.

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

Original assignee

The original assignee named on the issued patent is Grease Box LLC. The patent abstract and description indicate that Grease Box LLC developed "grease containment systems" for "outdoor cooking devices, such as wood pellet grills." This suggests they are an operating company that manufactures and sells products embodying the claims. The legal status on Google Patents indicates "Active, expires 2041-08-08" and lists "Grease Box LLC" as the "Current Assignee".

Assignment timeline

To reconstruct the full assignment record, I need to use the USPTO Assignment Search. I will search for patent number 11812895.

Based on the Google Patents "Legal Events" section:

  • 2022-08-29 (executed on 20220829) / recorded 2022-08-29 — Reel 061355/0271

    • Conveyance: Assignment
    • Assignor: Beaumont, Amy
    • Assignee: THE GREASE BOX LLC, ARIZONA
    • Correspondent: Not specified in Google Patents legal events. I would need to access the full USPTO assignment record for this detail.
    • Context: Transfer of inventor's interest.

  • 2023-10-05 (executed on 20231004) / recorded 2023-10-05 — Reel 065137/0603

    • Conveyance: Assignment
    • Assignor: HILLMAN, MARKUS DALE
    • Assignee: THE GREASE BOX LLC, ARIZONA
    • Correspondent: Not specified in Google Patents legal events. I would need to access the full USPTO assignment record for this detail.
    • Context: Transfer of inventor's interest.

These two entries from the Google Patents legal events indicate that the individual inventors assigned their rights to THE GREASE BOX LLC. There are no other assignments listed in the Google Patents legal events, suggesting that THE GREASE BOX LLC is the current owner. Without direct access to the USPTO Assignment Center search results for this specific patent number, I cannot provide the correspondent information for these assignments or confirm if there are any additional unlisted assignments.

Timeline diagram

timeline
    title Ownership of US 11812895
    2020 : Filed by Grease Box LLC
    2022 : Inventor Beaumont assigns to Grease Box LLC
    2023 : Inventor Hillman assigns to Grease Box LLC
    2023 : Patent Issued to Grease Box LLC
    2025 : Litigation filed (WA Western District)

NPE / troll-pattern signals

  1. Shell-entity transfer — Not present. The assignments are from individual inventors to "THE GREASE BOX LLC, ARIZONA," which appears to be the operating company mentioned as the original assignee.
  2. Known asserter in the chain — Not present. "THE GREASE BOX LLC" does not appear on public NPE lists, nor is it a known defensive aggregator.
  3. Repeat correspondent across the chain — Unclear. Correspondent information is not available in the provided Google Patents legal events. This would require direct access to USPTO Assignment Center records.
  4. Cascading transfers — Not present. Only two assignments are noted, both from individual inventors to the same entity, and they are over a year apart.
  5. Pre-litigation transfer — Unclear. While litigation is mentioned (2:25-cv-01300, filed in 2025), the exact date is not provided. The last assignment was in October 2023. If the litigation was filed within six months of the patent issuance (November 2023), it might be a signal, but the transfer dates predate the patent issuance.
  6. Bankruptcy fire-sale — Not present. No indication of bankruptcy for Grease Box LLC.
  7. Privateering — Not present. No information suggests this.
  8. Defensive aggregator (anti-NPE) — Not present. The chain does not terminate at a known defensive aggregator.

Verdict

Operating-company assertion

The assignments show the inventors assigning their rights to "THE GREASE BOX LLC" (Reel 061355/0271 and Reel 065137/0603). This entity is also listed as the original assignee and is described as producing "grease containment systems." The presence of district court litigation (case number 2:25-cv-01300) suggests an assertion, but it appears to be by an operating company, not an NPE, given the direct chain of ownership from the inventors to the company associated with the product.

USPTO Assignment Center Search for US11812895

Generated 5/30/2026, 6:45:53 PM