Tangent Technologies v. Recycled Plastics Industries: Settlement After 628 Days
Tangent Technologies, LLC brought a patent infringement action against Recycled Plastics Industries, LLC in Wisconsin’s Eastern District, asserting three patents covering wood-grained polymer board and substrate technology. The parties reached a confidential negotiated settlement, dismissing all claims and counterclaims with prejudice after 628 days of litigation.
Wood-grained polymer board IP dispute ends in confidential settlement
Tangent Technologies, LLC filed suit against Recycled Plastics Industries, LLC on 24 February 2023 in the Eastern District of Wisconsin before Judge William C. Griesbach. The action asserted three patents: utility patent US10981350B1 and two design patents, USD819235S and USD819234S, all directed to wood-grained polymer board and substrate products. Tangent alleged that RPI’s competing recycled plastic lumber products infringed its protected designs and utility claims.
The case closed on 13 November 2024 via a stipulated dismissal with prejudice under Federal Rule of Civil Procedure 41(a)(1)(A)(ii). Both parties — including RPI’s counterclaims — had their claims dismissed simultaneously pursuant to a confidential settlement agreement. Each side agreed to bear its own attorneys’ fees and costs, indicating no prevailing-party cost award was negotiated or ordered.
At 628 days, the litigation ran longer than many patent cases that settle early, suggesting the parties engaged in meaningful claim construction and discovery before reaching terms. The confidential nature of the settlement leaves the specific licensing or product modification terms unknown from the public record. The with-prejudice dismissal of RPI’s counterclaims is notable, as it forecloses any invalidity or non-infringement defenses RPI raised from being re-litigated independently.
Filing to Dismissed with Prejudice in 628 days
628 days — above the median for district court patent cases, suggesting substantive negotiation before resolution
Dismissed with prejudice: what the settlement structure means for both parties
Rule 41(a)(1)(A)(ii) stipulated dismissal with prejudice
A stipulated dismissal under Rule 41(a)(1)(A)(ii) requires agreement of all parties who have appeared. Dismissal with prejudice is a final adjudication on the merits — neither party can re-file the same claims in federal court. Both Tangent’s infringement claims and RPI’s counterclaims are permanently extinguished, giving the settlement finality equivalent to a court judgment.
Permanent bar on re-filingTangent’s patents survive — validity never adjudicated on the merits
Because the case settled before any court ruling on validity or infringement, US10981350B1 and the two design patents remain in force and presumptively valid. Tangent retains the right to enforce all three patents against third parties. The confidential settlement may include licensing terms or product-design commitments from RPI, though this cannot be confirmed from the public record.
Patents remain enforceableRPI’s counterclaims dismissed — invalidity arguments not preserved
RPI filed counterclaims — likely seeking invalidity or non-infringement declarations — which were also dismissed with prejudice. This means RPI cannot revive those specific counterclaims in a new action. Any future dispute with Tangent over the same patents would require RPI to raise new grounds, such as an IPR petition at the USPTO, rather than relitigating dismissed arguments in district court.
Counterclaims permanently closedConfidential terms create uncertainty for competing recycled plastic lumber makers
The undisclosed settlement terms — potentially including royalties or design-around obligations — leave other recycled plastic lumber manufacturers without visibility into what RPI agreed to. Tangent’s three patents covering wood-grained polymer aesthetics and substrate construction remain active enforcement tools. Competitors in the recycled plastic decking and lumber space should treat these patents as live risks until expiry.
Active enforcement risk remainsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Tangent Technologies, LLC | Company | Recycled plastic lumber manufacturer — holder of US10981350B1, USD819235S, USD819234SSearch in Eureka ↗ |
| Defendant | Recycled Plastics Industries, LLC | Company | Recycled Plastics Industries, LLC — manufacturer of recycled plastic lumber and polymer board productsSearch in Eureka ↗ |
| Plaintiff counsel | Amol A. Parikh | Attorney | Counsel for Tangent Technologies, LLCSearch in Eureka ↗ |
| Plaintiff counsel | James M. Oehler | Attorney | Counsel for Tangent Technologies, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Michael P. Chu | Attorney | Counsel for Tangent Technologies, LLCSearch in Eureka ↗ |
| Plaintiff law firm | McDermott Will & Emery LLP | Law Firm | Representing Tangent Technologies, LLCSearch in Eureka ↗ |
| Defendant counsel | Aaron T. Olejniczak | Attorney | Counsel for Recycled Plastics Industries, LLCSearch in Eureka ↗ |
| Defendant counsel | Christopher R. Liro | Attorney | Counsel for Recycled Plastics Industries, LLCSearch in Eureka ↗ |
| Defendant counsel | J. Mark Wilson | Attorney | Counsel for Recycled Plastics Industries, LLCSearch in Eureka ↗ |
| Defendant counsel | Jacob Z. Zambrzycki | Attorney | Counsel for Recycled Plastics Industries, LLCSearch in Eureka ↗ |
| Defendant law firm | Andrus Intellectual Property Law LLP | Law Firm | Representing Recycled Plastics Industries, LLCSearch in Eureka ↗ |
| Defendant law firm | Moore & Van Allen PLLC | Law Firm | Representing Recycled Plastics Industries, LLCSearch in Eureka ↗ |
| Presiding judge | Judge William C. Griesbach | Judge | Wisconsin Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The stipulation reflects a fully negotiated exit: both parties’ claims — Tangent’s infringement action and RPI’s counterclaims — are extinguished with equal finality. The ‘with prejudice’ language under Rule 41(a)(1)(A)(ii) carries the same preclusive effect as a judgment on the merits, meaning neither party can re-litigate these specific claims in federal district court. The mutual cost-bearing provision suggests neither side secured a dominant outcome sufficient to justify a fee-shifting demand, which is consistent with a compromise settlement rather than a capitulation by either party.
US10981350B1, USD819235S & USD819234S — Wood-Grained Polymer Board Technology
US10981350B1 is a utility patent covering the construction and composition of wood-grained polymer boards, protecting functional aspects of how recycled plastic substrates are manufactured to replicate wood grain aesthetics. The two design patents — USD819235S and USD819234S — protect the distinct ornamental appearances of polymer board profiles. Together, the portfolio covers both the ‘how it works’ and ‘how it looks’ dimensions of Tangent’s product, creating overlapping protection that is difficult for competitors to design around without addressing both patent types.
This three-patent portfolio is strategically significant for the recycled plastic lumber sector, where visual differentiation from natural wood is a core commercial driver. Utility protection on the substrate manufacturing process limits functional copying, while the design patents capture the aesthetic trade dress in patent form — with the potential for total-profit disgorgement remedies. For any company producing wood-grained recycled plastic boards for decking, fencing, or outdoor furniture, these patents represent a meaningful enforcement risk that has now been demonstrated through active litigation to settlement.
Should your product team run an FTO against US10981350B1, USD819235S and USD819234S?
Any manufacturer, distributor, or OEM supplying wood-grained polymer board or recycled plastic lumber products in the U.S. market should treat this patent family as a live risk. Tangent has demonstrated willingness to litigate to 628 days and secure a confidential settlement — signalling credible enforcement intent. R&D teams developing products with wood-grain surface textures or profiles that resemble Tangent’s ornamental designs are particularly exposed under the design patents’ ‘ordinary observer’ infringement standard.
PatSnap Eureka’s FTO Search Agent can map your product specifications against the claims of US10981350B1 and the ornamental scope of USD819235S and USD819234S, flagging potential overlap and identifying design-around opportunities before you commit to tooling. Eureka’s litigation monitoring layer also tracks any new enforcement actions by Tangent, giving IP teams and product managers early warning before a demand letter arrives.
Run a freedom-to-operate analysis on US10981350B1 to assess your product’s exposure
Run FTO in Eureka →Similar patent cases: recycled plastic and polymer board IP disputes
Explore related infringement actions involving polymer materials and design patent assertions in U.S. district courts, including the Eastern District of Wisconsin.
What this case signals for the recycled plastic lumber IP landscape
A multi-patent assertion combining utility and design rights is increasingly common in materials technology — this case illustrates the enforcement playbook.
Design patents amplify infringement leverage in polymer products
Tangent asserted two design patents alongside its utility patent, a combination that raises damages exposure significantly. Design patent infringement can trigger total-profit disgorgement on infringing articles under 35 U.S.C. § 289. For manufacturers of aesthetically differentiated recycled plastic products, this dual-track strategy warrants close FTO scrutiny before product launch.
With-prejudice dismissal signals a substantive resolution, not an early walkaway
Voluntary dismissals with prejudice after extended litigation — here, 628 days — typically reflect a negotiated resolution with real commercial terms rather than a plaintiff simply dropping weak claims. IP teams tracking Tangent’s enforcement posture should note the patents remain valid and presumptively enforceable against other market participants.
Tangent v Recycled — key questions answered
Tangent Technologies asserted three patents: utility patent US10981350B1 covering wood-grained polymer board construction, and two design patents USD819235S and USD819234S protecting the ornamental appearance of polymer board profiles. All three patents relate to wood-grained polymer board and substrate products.
The case was resolved through a confidential negotiated settlement and dismissed with prejudice under Federal Rule of Civil Procedure 41(a)(1)(A)(ii) on 13 November 2024. Both parties’ claims and counterclaims were dismissed simultaneously, with each side bearing its own costs and attorney fees.
Dismissal with prejudice means neither party can re-file the same claims in federal court. Tangent’s infringement claims and RPI’s counterclaims (likely including invalidity defenses) are permanently extinguished. Tangent’s patents — US10981350B1, USD819235S, and USD819234S — remain valid and enforceable against third parties.
No. The case settled before any court ruling on validity or infringement. RPI’s counterclaims were dismissed with prejudice as part of the mutual settlement, meaning invalidity arguments were not adjudicated on the merits. The patents remain presumptively valid and in force.
Asserting utility and design patents together creates compounded enforcement leverage. Utility patent infringement exposes a defendant to lost profits or reasonable royalty damages, while design patent infringement under 35 U.S.C. § 289 can require disgorgement of total profits from infringing articles. For visually differentiated products like wood-grained polymer boards, this dual strategy significantly raises the financial risk for defendants.
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