Premiere Concrete Admixtures v. E5 Inc.: Nanosilica Patent Dispute Settled in 193 Days
Premiere Concrete Admixtures LLC sought a declaratory judgment against E5 Incorporated over two utility patents covering nanosilica concrete admixture technology. The parties reached a negotiated settlement after 193 days, with the court retaining jurisdiction to enforce a product-specific carve-out protecting Premiere’s Ultrafinish 1L product.
Declaratory judgment action over nanosilica admixture patents ends in structured settlement
On April 11, 2024, Premiere Concrete Admixtures LLC filed a declaratory judgment action in the U.S. District Court for the Northern District of Ohio before Judge Jack Zouhary, targeting two utility patents owned by defendant E5 Incorporated: US11919823B2 and US11279658B2. Both patents relate to nanosilica-based concrete admixture technology, specifically formulations involving amorphous silica particles in defined nanometer size ranges and surface area specifications. The product at the centre of the dispute was Premiere’s Ultrafinish 1L concrete admixture.
The case closed on October 21, 2024, when the parties filed a Joint Motion for a Stipulated Order of Dismissal pursuant to a Settlement Agreement. The court dismissed the action with prejudice, meaning Premiere is permanently barred from re-filing the same declaratory judgment claims. Critically, the settlement also prohibits Premiere from challenging the validity or enforceability of either E5 patent in any forum — including the USPTO — creating a broad no-challenge covenant running in E5’s favour.
The 193-day resolution suggests the parties identified a commercially workable boundary relatively quickly. The product-specific carve-out — shielding Ultrafinish 1L from infringement suits provided it stays outside defined silica particle size and surface area parameters — implies the dispute centred on precise formulation boundaries rather than wholesale invalidity. What remains unknown from the public record is the financial consideration, if any, exchanged under the Settlement Agreement, and whether Premiere reformulated or intends to reformulate its product.
Filing to Dismissed with Prejudice in 193 days
193 days — resolved well under the typical 2–3 year district court patent litigation average
Settled with prejudice: what the stipulated order means for both parties
Dismissal with prejudice following a court-incorporated settlement
A dismissal with prejudice is a final adjudication on the merits — Premiere cannot refile the same declaratory judgment claims. Unusually, the court also retained jurisdiction over enforcement of both the order and the underlying Settlement Agreement, meaning either party can return to court for injunctive relief or contempt motions without filing a new action. The settlement terms are incorporated by reference into the court order, giving them binding judicial force beyond a private contract.
Prejudice dismissal + retained jurisdictionPremiere secures a product-specific safe harbour for Ultrafinish 1L
Premiere’s key commercial win is a defined carve-out: E5 is prohibited from suing Premiere for infringement of either patent based on the Ultrafinish 1L product, provided that product does not incorporate amorphous silica with average particle size of 1–55 nm and/or surface area of 300–900 m²/g. This creates a formulation boundary Premiere must stay within. The trade-off is significant: Premiere permanently waives its right to challenge the validity or enforceability of either E5 patent in any forum.
Safe harbour — formulation-conditionalE5 preserves patent validity and gains a permanent no-challenge covenant
E5 retains full ownership and enforceability of both patents without any validity finding being litigated. The no-challenge covenant is particularly valuable: Premiere — and any party acting through Premiere — is permanently barred from attacking the ‘658 or ‘823 patents at the USPTO or in any court. E5 concedes only a narrow, product-specific and parameter-conditioned non-suit undertaking for the Ultrafinish 1L product, preserving broad enforcement rights against other potential infringers and product variants.
Patents intact — no-challenge covenant securedNanosilica formulation boundaries now define the competitive line in concrete admixtures
The settlement’s technical parameters — silica particle size 1–55 nm and surface area 300–900 m²/g — establish a publicly visible formulation boundary in the nanosilica concrete admixture space. Competitors and R&D teams working on similar products should note these specifications as a de facto exclusion zone tied to the E5 patent portfolio. The broad no-challenge covenant also suggests E5 is actively fortifying its IP against validity attacks, consistent with a portfolio strategy seeking long-term market control in performance concrete additives.
Nanosilica formulation risk boundary definedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Premiere Concrete Admixtures LLC | Company | Concrete admixture manufacturer — declaratory judgment plaintiff challenging US11919823B2 and US11279658B2Search in Eureka ↗ |
| Defendant | E5 Incorporated | Individual | E5 Incorporated — Ohio-based owner of nanosilica concrete admixture utility patents US11919823B2 and US11279658B2Search in Eureka ↗ |
| Plaintiff counsel | James M. Buchanan | Attorney | Counsel for Premiere Concrete Admixtures LLCSearch in Eureka ↗ |
| Plaintiff counsel | John S. Shaffer | Attorney | Counsel for Premiere Concrete Admixtures LLCSearch in Eureka ↗ |
| Plaintiff counsel | Joseph W. Tucker | Attorney | Counsel for Premiere Concrete Admixtures LLCSearch in Eureka ↗ |
| Plaintiff counsel | Joshua Higgins | Attorney | Counsel for Premiere Concrete Admixtures LLCSearch in Eureka ↗ |
| Plaintiff counsel | Matthew J. Sorosiak | Attorney | Counsel for Premiere Concrete Admixtures LLCSearch in Eureka ↗ |
| Plaintiff law firm | MacMillan, Sobanski & Todd | Law Firm | Representing Premiere Concrete Admixtures LLCSearch in Eureka ↗ |
| Plaintiff law firm | MacMillan, Sobanski & Todd – Toledo | Law Firm | Representing Premiere Concrete Admixtures LLCSearch in Eureka ↗ |
| Plaintiff law firm | Newcomer, Shaffer, Bird & Spangler | Law Firm | Representing Premiere Concrete Admixtures LLCSearch in Eureka ↗ |
| Defendant counsel | Jason J. Blake | Attorney | Counsel for E5 IncorporatedSearch in Eureka ↗ |
| Defendant counsel | John L. Reulbach , III | Attorney | Counsel for E5 IncorporatedSearch in Eureka ↗ |
| Defendant counsel | John S. Cipolla | Attorney | Counsel for E5 IncorporatedSearch in Eureka ↗ |
| Defendant law firm | Calfee, Halter & Griswold LLP | Law Firm | Representing E5 IncorporatedSearch in Eureka ↗ |
| Defendant law firm | Calfee, Halter & Griswold LLP (Cleveland) | Law Firm | Representing E5 IncorporatedSearch in Eureka ↗ |
| Defendant law firm | Calfee, Halter & Griswold – Columbus | Law Firm | Representing E5 IncorporatedSearch in Eureka ↗ |
| Presiding judge | Judge Jack Zouhary | Judge | Ohio Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The Stipulated Order’s language is unusually precise: the non-suit undertaking for Ultrafinish 1L is explicitly conditional on the product’s silica specifications remaining outside the patented ranges. This drafting suggests the parties — and likely their technical experts — spent significant negotiation time mapping exact formulation boundaries. The court’s retention of jurisdiction for enforcement and contempt is notable at this stage; it signals the judge viewed the technical conditionality as sufficiently complex to warrant ongoing judicial oversight rather than leaving parties to private contract remedies.
US11919823B2 & US11279658B2 — nanosilica concrete admixture technology
US11919823B2 and US11279658B2 are utility patents assigned to E5 Incorporated covering nanosilica-based concrete admixture technology. The technically critical claim parameters — amorphous silica particles with average size in the 1–55 nanometre range and surface area of approximately 300–900 m²/g — define a specific performance window for nanosilica in cementitious applications. These specifications are consistent with colloidal or fumed silica products engineered to enhance concrete density, durability, and compressive strength through pozzolanic and filler effects at the nanoscale.
For the concrete admixture sector, these patents represent a staking of the high-performance nanosilica formulation space. The filing sequence — US16/501232 for the ‘658 patent and US18/114214 for the ‘823 patent — suggests an iterative prosecution strategy building scope around a core nanosilica formulation concept. Any competitor developing admixtures incorporating fumed silica, colloidal silica, or precipitated silica within these particle size and surface area parameters should treat these patents as a primary FTO concern, particularly given E5’s demonstrated willingness to assert them and secure court-incorporated no-challenge covenants.
Should you run an FTO against US11919823B2 and US11279658B2?
Any product team formulating nanosilica-based concrete admixtures, densifiers, or supplementary cementitious materials should treat these two E5 patents as mandatory FTO references. The particle size range (1–55 nm) and surface area specification (300–900 m²/g) disclosed in the settlement order map directly onto commercially available nanosilica grades used in high-performance concrete. If your product incorporates amorphous silica in these ranges, a formal FTO analysis is not optional — this case demonstrates E5 will actively enforce these patents.
PatSnap Eureka’s FTO Search Agent can map your formulation parameters against the claim language of US11919823B2 and US11279658B2, identify design-around pathways outside E5’s defined silica windows, and surface related patent families that may extend E5’s coverage. Eureka can also monitor the E5 portfolio for continuation filings and new prosecution activity — critical given that the ‘823 patent issued as recently as 2024, suggesting an active prosecution pipeline.
Run a freedom-to-operate analysis on US11919823B2 to assess your product’s exposure
Run FTO in Eureka →Similar patent cases in concrete admixture and specialty chemical formulations
Comparable nanosilica and specialty admixture patent disputes before U.S. district courts, including declaratory judgment and infringement actions in the construction materials sector.
What this case signals for the nanosilica concrete admixture IP landscape
The structured settlement reveals how nanosilica admixture patents can define precise competitive boundaries — with major implications for product teams and IP counsel.
Product-parameter carve-outs are becoming standard currency in admixture settlements
The Ultrafinish 1L carve-out — conditioned on staying outside specific silica particle size and surface area ranges — suggests parties are resolving admixture patent disputes through technical demarcation rather than outright validity battles. R&D and IP teams working on nanosilica products should document formulation parameters as a first-line freedom-to-operate defence.
No-challenge covenants in settlement orders are judicially enforceable — not just contractual
Because the Settlement Agreement is incorporated into the court’s dismissal order, the no-challenge covenant binding Premiere has the force of a court order. This is a meaningful escalation from a private contract: breach exposes Premiere to contempt proceedings. IP professionals should treat court-incorporated settlements as quasi-injunctions when advising on future challenge strategy.
Premiere v E5 — key questions answered
The settlement order required Premiere to permanently waive its right to challenge the validity or enforceability of US11919823B2 and US11279658B2 in any forum, including the USPTO. In exchange, E5 agreed not to sue Premiere for infringement based on the Ultrafinish 1L product, provided that product’s amorphous silica specifications remain outside the 1–55 nm particle size and 300–900 m²/g surface area ranges defined in the E5 patents.
Dismissal with prejudice in this case means Premiere’s declaratory judgment claims are permanently extinguished — the company cannot refile the same action. Combined with the court-incorporated no-challenge covenant, Premiere is also barred from attacking the E5 patents at the USPTO or in any court proceeding, making this a particularly final outcome for the patent holder’s position.
The settlement order identifies two key technical parameters tied to the E5 patent claims: (1) average amorphous silica particle size in the range of 1 to 55 nanometres, and (2) silica particle surface area in the range of approximately 300 to 900 m²/g. The Ultrafinish 1L product carve-out applies only where both these thresholds are not met, suggesting these specifications sit at the core of the asserted patent claims.
The public record does not state E5’s pre-litigation conduct explicitly, but declaratory judgment actions are typically filed when a plaintiff has reasonable apprehension of an infringement suit — often following a cease-and-desist letter, licensing demand, or assertion letter from the patent holder. The rapid 193-day resolution and the structured nature of the settlement order suggest the parties had already identified the relevant technical and commercial parameters before litigation commenced.
Yes. The Stipulated Order expressly states that the Ohio Northern District Court retains jurisdiction over enforcement of both the order and the underlying Settlement Agreement. Injunctive relief and motions for enforcement or contempt are specified as available remedies. This means either party can seek judicial intervention without filing a new lawsuit if the other side breaches the settlement terms.
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