Gravel Rating Systems v. The Container Store: Knowledge Filter Patent Settled
Gravel Rating Systems, LLC sued The Container Store, Inc. in the Eastern District of Texas alleging infringement of US7590636B1, covering a knowledge filter system. The parties reached a settlement and jointly moved to dismiss all claims with prejudice after 943 days of litigation — each side bearing its own legal costs.
Knowledge filter patent dispute ends in E.D. Texas settlement
On 23 November 2022, Gravel Rating Systems, LLC filed a patent infringement action against The Container Store, Inc. in the U.S. District Court for the Eastern District of Texas before Judge Amos L. Mazzant. The suit centred on US7590636B1, a patent covering a knowledge filter system — a technology for organising, rating, and filtering information — which Gravel Rating Systems alleged The Container Store had infringed through its commercial operations.
After 943 days of litigation, the parties filed a joint motion to dismiss all claims, counterclaims, and causes of action with prejudice pursuant to Fed. R. Civ. P. 41(a)(2), referencing an undisclosed settlement agreement. The court granted the motion on 23 June 2025. Dismissal with prejudice means neither party may relitigate the same claims — the dispute is permanently resolved on the terms privately agreed between the parties.
A resolution after nearly two and a half years, rather than early in the case, typically suggests the parties engaged in meaningful discovery, claim construction, or pre-trial motions before reaching commercial terms. The financial details of the settlement remain confidential and are not disclosed in the public record. What is notable is the mutual cost-bearing arrangement, which is standard in negotiated patent settlements and implies neither party extracted a fee-shifting concession from the other.
Filing to Case Dismissed in 943 days
943 days — longer than the median E.D. Texas patent case, suggesting substantive pre-trial litigation before settlement
Dismissed with prejudice: what the settlement resolution means for both parties
Dismissal with prejudice bars any future refiling of these claims
Under Fed. R. Civ. P. 41, a dismissal with prejudice operates as a final judgment on the merits. Gravel Rating Systems cannot refile infringement claims against The Container Store based on the same patent and the same accused conduct. The settlement agreement referenced in the joint motion governs the private terms — likely including a licence, covenant not to sue, or lump-sum payment — but those terms are not public.
Permanent resolutionGravel Rating Systems exits with undisclosed settlement proceeds
By agreeing to dismiss with prejudice, Gravel Rating Systems forfeited any right to pursue further claims against The Container Store on US7590636B1. In exchange, the settlement agreement — the terms of which are confidential — likely provided commercial value, whether financial or licensing-based. Agreeing to mutual cost-bearing suggests neither party obtained a dominant pre-trial position, or that both preferred a clean exit over continued litigation risk.
Confidential settlementThe Container Store resolves infringement exposure permanently
The Container Store, represented by DLA Piper, secured a with-prejudice dismissal, meaning the knowledge filter patent claim cannot be reasserted against it by Gravel Rating Systems under the same theory. The mutual cost-bearing clause is consistent with a negotiated resolution rather than a capitulation, suggesting The Container Store maintained meaningful litigation leverage throughout the proceedings before agreeing to settlement terms.
Infringement risk clearedUS7590636B1 remains live — third parties retain exposure
A dismissal with prejudice resolves only the dispute between these two parties. US7590636B1 remains an issued, enforceable patent and Gravel Rating Systems retains the right to assert it against other companies in the retail and e-commerce sector. Businesses operating knowledge filter, product rating, or information retrieval systems should monitor this patent for further enforcement activity.
Patent still enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Gravel Rating Systems, LLC | Company | Patent assertion entity — holder of US7590636B1, knowledge filter system technologySearch in Eureka ↗ |
| Defendant | The Container Store, Inc. | Company | The Container Store, Inc. — U.S. specialty retail chain for storage and organisation productsSearch in Eureka ↗ |
| Plaintiff counsel | Edward Andrew Cavazos | Attorney | Counsel for Gravel Rating Systems, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Paul Max Richter | Attorney | Counsel for Gravel Rating Systems, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Timothy Devlin | Attorney | Counsel for Gravel Rating Systems, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Devlin Law Firm LLC (Wilmington) | Law Firm | Representing Gravel Rating Systems, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Pillsbury Winthrop Shaw Pittman LLP | Law Firm | Representing Gravel Rating Systems, LLCSearch in Eureka ↗ |
| Defendant counsel | Brian K. Erickson | Attorney | Counsel for The Container Store, Inc.Search in Eureka ↗ |
| Defendant counsel | John M. Guaragna | Attorney | Counsel for The Container Store, Inc.Search in Eureka ↗ |
| Defendant law firm | DLA Piper LLP (US) | Law Firm | Representing The Container Store, Inc.Search in Eureka ↗ |
| Defendant law firm | DLA Piper US LLP (Austin) | Law Firm | Representing The Container Store, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Amos L Mazzant | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order tracks the joint motion verbatim, granting dismissal with prejudice of all claims and counterclaims pursuant to Fed. R. Civ. P. 41 and subject to a referenced but undisclosed settlement agreement. The with-prejudice designation is the operative legal term: it forecloses relitigation between these parties and constitutes a final resolution on the merits. The mutual cost-bearing clause — each party absorbing its own fees — is a standard negotiated term and does not imply any finding of prevailing-party status. The underlying settlement terms remain private.
US7590636B1 — Knowledge filter system for information organisation and rating
US7590636B1, filed under application number US11/348037, covers a knowledge filter system — a technology for organising, categorising, rating, and selectively presenting information based on structured filtering criteria. Patents in this technical class are relevant to product discovery engines, content recommendation systems, and customer-facing rating platforms. The patent was granted to the original assignee and was subsequently asserted by Gravel Rating Systems, LLC, suggesting it may have been acquired as part of a patent assertion portfolio strategy.
Knowledge filter and information retrieval patents occupy a strategically contested space in retail and e-commerce technology. As retailers deploy increasingly sophisticated product search, recommendation, and rating tools, patents covering the underlying filtering logic become high-value enforcement assets. US7590636B1’s assertion against The Container Store — a retailer whose business model centres on product organisation — suggests the patent holder views retail product presentation systems as within the patent’s claim scope. Third parties operating similar systems should treat this patent as an active enforcement risk.
Should you run an FTO against US7590636B1?
Any company operating knowledge filter, product rating, search ranking, or information organisation systems in the retail or e-commerce sector should consider commissioning a freedom-to-operate analysis against US7590636B1. The patent’s assertion against a major specialty retailer confirms the patent holder’s willingness to enforce, and the with-prejudice settlement against The Container Store does not limit Gravel Rating Systems’ ability to pursue other defendants. R&D teams building or procuring product discovery or content filtering tools are the primary risk group.
PatSnap Eureka’s FTO Search Agent allows IP and R&D teams to map product features against the claims of US7590636B1 in minutes, identifying freedom-to-operate gaps and design-around opportunities. Eureka can also surface the full Gravel Rating Systems assertion history, related continuation and divisional patents in the same family, and comparable claims from competing patent holders — giving counsel and product teams a complete picture before the next enforcement action is filed.
Run a freedom-to-operate analysis on US7590636B1 to assess your product’s exposure
Run FTO in Eureka →Similar knowledge filter and information retrieval patent cases in E.D. Texas
Cases involving knowledge filter, content rating, and information retrieval patents litigated in the Eastern District of Texas before Judge Mazzant and comparable patent assertion entities.
What this case signals for the knowledge filter and retail tech IP landscape
A 943-day infringement dispute in E.D. Texas ending in a with-prejudice settlement carries clear signals for companies operating content rating and filtering technologies.
E.D. Texas venue remains attractive for patent assertion entities
Gravel Rating Systems’ choice of the Eastern District of Texas — a historically plaintiff-friendly venue — is consistent with broader PAE strategy. Companies with retail or e-commerce technology exposure should monitor assertion activity in this district, particularly from entities holding information-filtering and rating system patents.
With-prejudice settlement provides the strongest commercial closure available
Unlike a without-prejudice dismissal, the with-prejudice outcome permanently extinguishes Gravel Rating Systems’ infringement claims against The Container Store on this patent. For in-house counsel benchmarking settlement strategy, mutual cost-bearing combined with with-prejudice dismissal is a common structure that preserves both parties’ dignity while closing the file.
Gravel v Container — key questions answered
The case was dismissed with prejudice by joint motion on 23 June 2025 pursuant to Fed. R. Civ. P. 41, following a confidential settlement agreement. All claims, counterclaims, and causes of action were dismissed, with each party bearing its own costs and attorneys’ fees. The case had been pending in the Eastern District of Texas for 943 days.
Gravel Rating Systems asserted US7590636B1, filed under application number US11/348037, which covers a knowledge filter system for organising, rating, and filtering information. The accused product category was described as a ‘knowledge filter.’ The patent remained enforceable following the settlement, as the dismissal only resolves claims between these two specific parties.
A dismissal with prejudice under Fed. R. Civ. P. 41 operates as a final judgment on the merits. The plaintiff cannot refile the same infringement claims against the same defendant based on the same patent and accused conduct. It is the strongest form of closure a defendant can obtain short of a full trial victory, and is the standard mechanism for formalising a negotiated patent settlement in U.S. federal court.
No. The with-prejudice dismissal protects only The Container Store. US7590636B1 remains an issued and enforceable patent, and Gravel Rating Systems retains full rights to assert it against other companies. Third parties operating knowledge filter, product rating, or information retrieval systems — particularly in retail and e-commerce — should not assume any protection from this settlement.
Gravel Rating Systems was represented by Devlin Law Firm LLC (Wilmington) and Pillsbury Winthrop Shaw Pittman LLP, with attorneys Edward Andrew Cavazos, Paul Max Richter, and Timothy Devlin listed as counsel. The Container Store was represented by DLA Piper LLP (US) and DLA Piper US LLP (Austin), with Brian K. Erickson and John M. Guaragna as lead attorneys.
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