DCT

1:25-cv-01035

Boston Scientific Corp v. Atraverse Medical Inc

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I. Executive Summary and Procedural Information

  • Parties & Counsel:
  • Case Identification: 1:25-cv-01035, D. Del., 04/27/2026
  • Venue Allegations: Venue is alleged to be proper in the District of Delaware because the defendant, Atraverse Medical, Inc., is a Delaware corporation.
  • Core Dispute: Plaintiff alleges that Defendant's HOTWIRE™ radiofrequency guidewire device infringes three U.S. patents related to medical devices for puncturing tissue.
  • Technical Context: The technology involves guidewire-based systems that use radiofrequency (RF) energy to create punctures in cardiac tissue, such as the atrial septum, to facilitate transseptal surgical procedures.
  • Key Procedural History: The filing is a Second Amended Complaint. Plaintiff previously filed an initial complaint on August 18, 2025, and sent a cease-and-desist letter on August 20, 2025. The complaint also alleges that Defendant cited the parent of the asserted patents during the prosecution of its own patent application, suggesting early awareness of the technology.

Case Timeline

Date Event
2013-08-07 Earliest Priority Date for '238, '639, and '406 Patents
2024-03-XX Atraverse cites parent of Asserted Patents in its own patent prosecution
2024-05-XX Atraverse receives 510(k) clearance for HOTWIRE™ device
2024-06-04 U.S. Patent No. 11,998,238 Issues
2024-09-XX Atraverse CEO presents HOTWIRE™ at LSI Europe conference
2025-08-18 Boston Scientific files initial complaint against Atraverse
2025-08-20 Boston Scientific sends cease and desist letter to Atraverse
2025-10-07 U.S. Patent No. 12,433,639 Issues
2026-01-12 Boston Scientific notes intent to add patents at Scheduling Conference
2026-04-14 U.S. Patent No. 12,599,406 Issues
2026-04-27 Boston Scientific files Second Amended Complaint

II. Technology and Patent(s)-in-Suit Analysis

U.S. Patent No. 11,998,238 - "Methods and Devices for Puncturing Tissue"

  • Patent Identification: U.S. Patent No. 11,998,238, "Methods and Devices for Puncturing Tissue", issued June 4, 2024.
  • The Invention Explained:
    • Problem Addressed: The patent's background section describes the difficulty of navigating medical instruments through tortuous vascular paths to reach a specific tissue site for puncture, such as accessing the heart's septum from a superior vein. Conventional stiff dilators may prevent a steerable sheath from achieving its intended curve, while overly flexible devices may not provide the necessary force for tissue dilation. ʼ238 Patent, col. 3:1-43
    • The Patented Solution: The invention is a "hybrid" medical device, such as a guidewire, composed of sections with different physical properties. It features an elongate member with a "rail section" that is flexible enough to be maneuvered through complex anatomies but rigid enough to serve as a stable rail for other devices. ʼ238 Patent, col. 2:32-36 The device includes a distal "active tip" that uses energy to create a puncture, and its distal section is designed to form a coil upon deployment to anchor the device across the puncture site. ʼ238 Patent, abstract
    • Technical Importance: This design seeks to streamline complex cardiac procedures by combining puncturing, anchoring, and rail-support functions into a single device, thereby reducing device exchanges and improving procedural safety and efficiency. Compl. ¶13
  • Key Claims at a Glance:
    • The complaint asserts at least independent claim 1. Compl. ¶18
    • The essential elements of independent claim 1 include:
      • An elongate member with a proximal section, a distal section, and a rail section in between.
      • An active tip at the distal end, operable to deliver energy to create a puncture.
      • The rail section configured to act as a rail for other tubular members and be maneuverable.
      • The distal section defining a curved portion and a straight portion, with the straight portion being distal to the curved portion.
      • The distal section straight portion having a "reverse taper" where its outer diameter increases in the distal direction.
    • The complaint reserves the right to assert additional claims. Compl. ¶18

U.S. Patent No. 12,433,639 - "Methods and Devices for Puncturing Tissue"

  • Patent Identification: U.S. Patent No. 12,433,639, "Methods and Devices for Puncturing Tissue", issued October 7, 2025.
  • The Invention Explained:
    • Problem Addressed: The patent addresses the same challenges as the '238 Patent: gaining access to tissue sites like the heart septum through difficult vascular pathways, which can require multiple inefficient device exchanges and present challenges for device steerability and stability. ʼ639 Patent, col. 3:4-48
    • The Patented Solution: The invention is a medical device for puncturing tissue, comprising an elongate member with an electrode. The claims focus on specific structural characteristics of the distal end, including a curved portion and a straight portion, and the relative diameters of the wire in these different portions to achieve the desired performance of puncturing, anchoring, and providing a stable rail. ʼ639 Patent, abstract ʼ639 Patent, col. 33:1-14
    • Technical Importance: The technology provides a refined structural definition for a multi-function guidewire to improve performance and safety in transseptal access procedures. Compl. ¶13
  • Key Claims at a Glance:
    • The complaint asserts at least independent claims 1 and 20. Compl. ¶24
    • The essential elements of independent claim 1 include:
      • An elongate member including a wire, with a proximal section, a distal section with an electrode, and a rail section.
      • The electrode is operable to deliver energy to puncture a heart septum.
      • The distal section has a curved portion and a straight portion (distal to the curved portion).
      • A key structural feature: an outer diameter of the wire in the straight portion is greater than an outer diameter of the wire at the distal end of the curved portion.
    • The essential elements of independent claim 20 include:
      • An elongate member with a wire, electrode, and rail, operable to puncture a heart septum.
      • The distal section has a curved portion and a straight portion.
      • A key functional feature: the curved portion is configured so that upon deployment, the distal end of the straight portion "curves away from the axis of advancement."
    • The complaint reserves the right to assert additional claims. Compl. ¶24

U.S. Patent No. 12,599,406 - "Methods and Devices for Puncturing Tissue"

  • Patent Identification: U.S. Patent No. 12,599,406, "Methods and Devices for Puncturing Tissue", issued April 14, 2026.
  • Technology Synopsis: The patent describes a multi-function medical guidewire designed to solve problems associated with accessing and puncturing cardiac tissue. It proposes a device with sections of varying stiffness, including a maneuverable but stable rail section, and a distal electrode that uses RF energy to create a puncture, which improves procedural efficiency and safety. Compl. ¶13 ʼ406 Patent, abstract
  • Asserted Claims: The complaint asserts at least independent claim 1. Compl. ¶30
  • Accused Features: The complaint alleges that Defendant's HOTWIRE™ device, a guidewire that uses RF power from a distal electrode to create an atrial septal defect, infringes the '406 Patent. Compl. ¶14 Compl. ¶30

III. The Accused Instrumentality

  • Product Identification: The accused product is the "HOTWIRE™" medical device. Compl. ¶14
  • Functionality and Market Context:
    • The complaint describes the HOTWIRE™ as a "sterile, single-use guidewire device that delivers radiofrequency (RF) power in a monopolar mode to a distal electrode segment for the creation of an atrial septal defect in the heart," based on Defendant's FDA 510(k) filings. Compl. ¶14
    • The complaint further alleges that, according to Defendant's CEO, the device functions by using a "little blast of radiofrequency energy" to "denature the tissue and gently advance across" the septum, as an alternative to mechanical force. Compl. ¶19
    • The complaint alleges the product is commercially significant, having been used in "commercial clinical cases" and generating "initial revenue, about 80% gross profit margin" as of September 2024. Compl. ¶15 No probative visual evidence provided in complaint.

IV. Analysis of Infringement Allegations

The complaint incorporates by reference detailed claim charts as Exhibits B, D, and F, which were not provided with the complaint document. Compl. ¶¶18, 24, 30 The narrative infringement theory alleges that the HOTWIRE™ device, by its nature as a guidewire using RF energy to puncture the atrial septum, practices the core elements of the asserted patents. The allegations for each patent suggest that the HOTWIRE™ device is an elongate member with the claimed sections (proximal, rail, distal), includes an active RF electrode for puncturing, and is used in a manner that constitutes direct and indirect infringement.

  • Identified Points of Contention:
    • Scope Questions: A central dispute may arise over the construction of the term "rail section." The court may need to determine whether the term, as used in the patents, requires a specific level of stiffness or functionality beyond that of a conventional guidewire, and whether the HOTWIRE™ device meets that standard. A similar question exists for the specific structural limitation "reverse taper" in the '238 Patent and the corresponding dimensional relationships in the '639 Patent.
    • Technical Questions: A key factual question will be whether the physical structure of the HOTWIRE™ device maps onto the specific geometric limitations of the asserted claims. For example, does the device's distal section actually possess a "reverse taper" as claimed in the '238 Patent, or the specific wire diameter relationships required by claim 1 of the '639 Patent? The analysis may depend on expert testimony and detailed product teardowns.

V. Key Claim Terms for Construction

  • The Term: "rail section" (from '238 Patent, claim 1; '639 Patent, claim 1)

    • Context and Importance: This term is critical because it defines a key function of the invention that allegedly distinguishes it from a simple guidewire. The case may turn on whether the accused HOTWIRE™ is merely a guidewire or if it also functions as a "rail" that provides structural "supporting installation" for other devices as the patent requires. Practitioners may focus on this term because it is a functional limitation that could be narrower than the general structure of the accused device.
    • Intrinsic Evidence for Interpretation:
      • Evidence for a Broader Interpretation: The claims use broad functional language, stating the rail section is "configured to both act as a rail for supporting installation of one or more tubular members thereupon, as well as to be maneuverable." ('238 Patent, col. 32:17-21). Plaintiff may argue this language covers any guidewire sufficiently stiff to guide a catheter.
      • Evidence for a Narrower Interpretation: The specification discloses specific embodiments with particular stiffness values (e.g., a stiffness between 100 N/m and 600 N/m) and materials (e.g., spring tempered steel). ('238 Patent, col. 15:31-34). Defendant may argue that these specific disclosures limit the scope of "rail section" to devices with similar physical properties, not just any guidewire.

  • The Term: "reverse taper" ('238 Patent, claim 1)

    • Context and Importance: This structural limitation is unique to the asserted independent claim of the '238 Patent. A finding of infringement will likely require direct evidence that the accused product has this specific geometry.
    • Intrinsic Evidence for Interpretation:
      • Evidence for a Broader Interpretation: The claim itself provides a definition: "an outer diameter of the distal section straight portion increases in a distal direction." ('238 Patent, col. 32:29-31). Plaintiff may argue that any structure meeting this simple geometric definition literally infringes, regardless of its functional purpose.
      • Evidence for a Narrower Interpretation: Figure 5F of the patent illustrates this feature as a distinct flare in the wire diameter. ('238 Patent, Fig. 5F). Defendant may argue that the term should be construed in light of this embodiment to require a functionally significant and non-trivial increase in diameter, rather than incidental manufacturing variations.

VI. Other Allegations

  • Indirect Infringement: The complaint alleges inducement of infringement for all three patents. The basis for this allegation is that Atraverse "instructs and encourages physicians on the use of the HOTWIRE™ for transseptal procedures," citing as an example a presentation by Atraverse's CEO explaining how to use the device to puncture the septum. Compl. ¶19 Compl. ¶25 Compl. ¶31
  • Willful Infringement: Willfulness is alleged for all three patents. The complaint alleges Atraverse had knowledge of the patents and the infringing nature of its activities based on a timeline of events, including: Defendant's citation to the parent of the asserted patents during its own patent prosecution before the first patent issued Compl. ¶20; Defendant's CEO acknowledging Plaintiff's market position Compl. ¶20; the filing of the original complaint on August 18, 2025 Compl. ¶26; and a cease-and-desist letter sent on August 20, 2025, that explicitly warned of infringement by the then-issued '238 Patent and the forthcoming '639 Patent. Compl. ¶26

VII. Analyst's Conclusion: Key Questions for the Case

  • A core issue will be one of structural infringement: does the accused HOTWIRE™ device physically embody the precise geometric limitations of the asserted claims, particularly the "reverse taper" defined in the '238 Patent and the relative wire diameters recited in the '639 Patent? The outcome may rely heavily on competing expert evidence and product analysis.
  • A second central issue will be one of claim scope: can the term "rail section," which implies a support function for other devices, be construed to read on the accused guidewire? This will require the court to determine whether the claimed function demands a structure with capabilities beyond those of a standard, albeit stiff, medical guidewire.
  • A key question for damages will be willfulness: given the complaint's detailed allegations of pre-suit and even pre-issuance knowledge-stemming from Defendant's own patent prosecution, an explicit cease-and-desist letter, and the filing of prior complaints-the court will face the question of whether Defendant's conduct was objectively reckless, which could trigger enhanced damages if infringement is found.
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