Butler & Stuller v. USPTO — Federal Circuit Affirms Unpatentability of Sterling Silver Alloy
Jewelry industry applicants John Robert Butler and Stuller, Inc. challenged the USPTO’s rejection of US16/891541, a patent application covering a sterling silver alloy and articles made from it. The Federal Circuit affirmed the unpatentability determination after 736 days of appellate proceedings, leaving the application without patent protection.
Federal Circuit closes the door on a contested sterling silver alloy patent claim
Filed on 12 September 2023, Case No. 23-2380 pitted jewelry industry stakeholders John Robert Butler and Stuller, Inc. against the Acting Director of the USPTO before the Court of Appeals for the Federal Circuit. The dispute centred on US patent application 16/891541 (published as US20200308672A1), which claimed a novel sterling silver alloy composition and articles manufactured from it — a commercially significant area given sterling silver’s central role in fine jewellery production.
The Federal Circuit issued its affirmance on 17 September 2025, 736 days after the appeal was filed. The court found no reversible error in the USPTO’s underlying determination that the claimed invention was unpatentable, ordering and adjudging the ruling affirmed. For applicants Butler and Stuller, the affirmance means the application remains rejected with no patent rights conferred on the claimed alloy formulation.
A 736-day appellate timeline is consistent with complex patentability appeals at the Federal Circuit, where technical claim construction and prior art analysis can extend briefing cycles. The public record does not disclose which specific grounds of unpatentability — whether obviousness, anticipation, or another section — the USPTO relied upon, nor whether any claim amendments were proposed. The affirmance represents a final resolution at this appellate level.
Filing to Unpatentable in 736 days
736 days — longer than the median Federal Circuit patent appeal of ~18 months
Federal Circuit affirms: what the unpatentability ruling means for both parties
What ‘AFFIRMED’ means at the Federal Circuit
An affirmance by the Federal Circuit signals that the appellate panel found no reversible error in the USPTO’s underlying patentability determination. The court applies a deferential standard to USPTO factual findings and reviews legal conclusions de novo. Here, the affirmance means the agency’s rejection of US16/891541 survives appellate scrutiny — the claimed sterling silver alloy remains unpatented.
No reversible error foundStuller and Butler lose appellate challenge — alloy claims unprotected
For Butler and Stuller, Inc., the affirmance exhausts appellate relief at the Federal Circuit level. The application US16/891541 remains rejected, meaning the specific sterling silver alloy composition and article claims cannot be enforced as patent rights. Further review would require a petition for certiorari to the Supreme Court — a rarely granted avenue. Applicants may consider continuation strategies or design-arounds within the prior art landscape.
Patent rights deniedUSPTO’s unpatentability position fully vindicated on appeal
The Federal Circuit’s affirmance validates the USPTO’s examination and appeal board conclusions regarding the sterling silver alloy application. The Acting Director’s legal position — that the claimed invention did not meet patentability requirements — is now confirmed by appellate authority. This strengthens the USPTO’s institutional standing in similar alloy composition examination disputes and raises the bar for future applicants seeking to distinguish similar prior art in the silver alloy space.
Agency position upheldSterling silver alloy sector faces no new patent barrier from this application
The affirmance means competitors and manufacturers in the sterling silver jewellery sector are not constrained by the patent claims in US16/891541. Companies working with silver alloy formulations — particularly those developing tarnish-resistant or hardness-enhanced sterling compositions — can continue without an infringement risk from this application. However, the case signals that novel alloy compositions face close prior art scrutiny at both the USPTO and Federal Circuit.
No new enforcement riskFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | John Robert Butler | Individual | Jewelry industry innovators — applicants for US16/891541 covering a sterling silver alloySearch in Eureka ↗ |
| Co-Plaintiff | Stuller, Inc. | Company | Search in Eureka ↗ |
| Defendant | DERRICK BRENT, Acting Under Secretary of Commerce for Intellectual Property and Acting Director of the United States Patent and Trademark Office | Individual | Acting Director of the USPTO, defending the agency’s unpatentability determinationSearch in Eureka ↗ |
| Plaintiff counsel | Chad Grand | Attorney | Counsel for John Robert ButlerSearch in Eureka ↗ |
| Plaintiff counsel | Ronald Bennett Ford | Attorney | Counsel for John Robert ButlerSearch in Eureka ↗ |
| Plaintiff law firm | Roy Kiesel Ford Doody & North, APLC | Law Firm | Representing John Robert ButlerSearch in Eureka ↗ |
| Defendant counsel | Thomas W. Krause | Attorney | Counsel for DERRICK BRENT, Acting Under Secretary of Commerce for Intellectual Property and Acting Director of the United States Patent and Trademark OfficeSearch in Eureka ↗ |
| Defendant law firm | United States Patent & Trademark Office | Law Firm | Representing DERRICK BRENT, Acting Under Secretary of Commerce for Intellectual Property and Acting Director of the United States Patent and Trademark OfficeSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Court of Appeals for the Federal CircuitSearch in Eureka ↗ |
Official order — verbatim text
The Federal Circuit’s order — ‘ORDERED AND ADJUDGED: AFFIRMED’ — is a standard affirmance disposition confirming that the USPTO’s unpatentability determination contains no reversible legal or factual error. The terse formulation is consistent with Federal Circuit practice in ex parte patent appeals where the agency position is upheld wholesale. The basis of termination recorded as ‘Unpatentable’ confirms that no individual claims survived review. Both the breadth and specific compositional claims of US16/891541 are foreclosed from patent protection following this ruling.
US16/891541 — Sterling Silver Alloy Composition and Articles
US patent application 16/891541, published as US20200308672A1, covers a sterling silver alloy and articles made from it — a technically specific claim set in the precious metals domain. Filed in the context of jewellery manufacturing, the application targets an area where alloy performance characteristics such as tarnish resistance, hardness, and workability are commercially critical. The application date (application number format suggests a 2020 filing window) places it within a period of active innovation in silver alloy metallurgy.
Sterling silver alloys are foundational to the fine jewellery industry, and patent protection over novel compositions can confer significant competitive advantage to manufacturers and suppliers. Stuller, Inc. is a major jewellery industry supplier, making this application strategically material. The USPTO’s unpatentability finding — now affirmed — suggests the claimed formulation lacked sufficient differentiation from the existing prior art landscape, a common challenge in mature metallurgical fields where incremental alloy modifications are well-documented.
Should you run an FTO against US16/891541?
Jewellery manufacturers, silver alloy suppliers, and product developers working with sterling silver compositions should be aware that US16/891541 has been ruled unpatentable and that ruling has been affirmed by the Federal Circuit. While this specific application poses no enforcement risk, Stuller, Inc.’s broader IP portfolio may include related granted patents covering adjacent alloy formulations or manufacturing methods. R&D teams developing tarnish-resistant or performance-enhanced sterling silver products should map the full Stuller portfolio before commercialising.
PatSnap Eureka’s FTO Search Agent can rapidly identify active granted patents in the sterling silver alloy space, map claim scope against your product formulations, and flag related Stuller or Butler filings that may present residual risk. Eureka’s AI-powered claim analysis surfaces both anticipatory prior art and potential design-around pathways — enabling your team to proceed with confidence in a complex and densely patented precious metals landscape.
Run a freedom-to-operate analysis on US20200308672A1 to assess your product’s exposure
Run FTO in Eureka →Similar Federal Circuit patent appeals: precious metals & alloy composition cases
Explore Federal Circuit appeals involving alloy composition patentability, USPTO unpatentability affirmances, and precious metals IP disputes similar to Case 23-2380.
What this case signals for the precious metals alloy IP landscape
The Federal Circuit’s affirmance in Butler & Stuller v. USPTO reinforces the high patentability bar for silver alloy compositions at every level of review.
Alloy composition patents face heightened prior art scrutiny
The USPTO’s successful defence of its unpatentability ruling — affirmed by the Federal Circuit — suggests that sterling silver alloy claims face rigorous prior art analysis. Applicants in the precious metals space should conduct deep freedom-to-operate and patentability assessments before filing, paying close attention to prior alloy composition publications and existing formulation patents.
Affirmance raises the bar for future silver alloy applicants
With the Federal Circuit declining to find reversible error, the USPTO’s examination approach to sterling silver alloy claims carries appellate-level endorsement. Future applicants seeking protection for silver alloy compositions — particularly those targeting jewellery applications — should anticipate rigorous obviousness and anticipation challenges and draft claims with greater specificity and differentiation from existing art.
Butler v DERRICK — key questions answered
The Federal Circuit affirmed the USPTO’s unpatentability determination for patent application US16/891541, covering a sterling silver alloy. The case closed on 17 September 2025 after 736 days. The affirmance means the application remains rejected and no patent rights were granted on the claimed alloy.
US20200308672A1 (application US16/891541) claims a sterling silver alloy composition and articles manufactured from it. The USPTO determined the claims were unpatentable — a finding affirmed by the Federal Circuit. The specific grounds (e.g., obviousness or anticipation) are not detailed in the public docket, but the outcome suggests the claimed formulation lacked sufficient differentiation from prior art.
An affirmance by the Federal Circuit confirms that no reversible error was found in the lower USPTO decision. For the applicant, it means the patent application remains rejected. Further review requires a petition for certiorari to the Supreme Court, which is rarely granted. The applicant may also explore continuation applications covering narrower or differently framed claims.
The ruling means the specific sterling silver alloy described in US16/891541 cannot be enforced as a patent by Butler or Stuller, Inc. Competitors and manufacturers may use the disclosed formulation without infringement risk from this application. However, Stuller’s broader patent portfolio should be reviewed, as related granted patents may cover adjacent alloy compositions or processes.
The plaintiffs-appellants are John Robert Butler and Stuller, Inc., represented by Chad Grand and Ronald Bennett Ford of Roy Kiesel Ford Doody & North, APLC. The defendant-appellee is Derrick Brent, Acting Under Secretary of Commerce for Intellectual Property and Acting Director of the USPTO, represented by Thomas W. Krause of the USPTO’s legal team.
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