US 10639404

I will now provide a concise summary of US patent 10639404 and search for its litigation status.

US Patent 10639404 Summary

• Title: Wound dressing
• Assignee: WOUND HEALING TECHNOLOGIES LLC
• Inventor(s): Isaac Lichtenstein
• Filing Date: June 3, 2011
• Issue Date: May 5, 2020
• Abstract: The patent describes apparatus and methods for a wound dressing, specifically for negative pressure treatment (NPT) of wounds. The dressing includes a wound-fluid NPT drain, a vacuum/drainage tube connected to the drain, a fluid-absorbing/transferring material, a contour-conforming draping layer, a vapor sealant sheet, and a tube-anchorage component. The tube-anchorage component mechanically maintains the placement of the NPT drain within the fluid-absorbing/transferring material.

Plain-Language Overview of Independent Claims:

Claim 1:
This claim describes a wound dressing comprising:

1. A flexible, airtight, and contour-conforming draping layer that has a surface designed to stick to tissue and is perforated (has holes) in at least one area.
2. A wound-fluid negative pressure treatment (NPT) drain positioned above the draping layer's perforated area.
3. A vacuum/drainage tube connected to the NPT drain.
4. A fluid-absorbing/transferring material that surrounds or partly surrounds the NPT drain and is in contact with at least some of the draping layer's perforated area.
5. An airtight vapor sealant sheet that covers at least part of the fluid-absorbing/transferring material.
6. A tube-anchorage component that is in contact with the vapor sealant sheet. This component mechanically holds the vacuum/drainage tube in place and creates an airtight seal where the tube exits the dressing.

Claim 11:
This claim describes a method for applying a wound dressing to a wound-site for negative pressure treatment (NPT), comprising the steps of:

1. Preparing the wound-site by cleansing and slightly under-packing the wound-bed with sterile packing material.
2. Removing a backing layer from a wound dressing.
3. Positioning the dressing so that an NPT drain within the dressing is appropriately aligned with the wound-bed.
4. Applying the dressing to the wound-site so that a tissue-adhesive surface of a draping layer covers the packing material and adheres to the surrounding tissue.
5. Connecting the vacuum/drainage tube to an NPT vacuum controller.
   The dressing used in this method includes a draping layer with perforations, an NPT drain, a vacuum/drainage tube, fluid-absorbing/transferring material, an airtight vapor sealant sheet, and a tube-anchorage component that secures the tube and seals its exit from the dressing.

Claim 12:
This claim describes a wound dressing that includes:

1. An NPT drain with perforations for fluid access.
2. A vacuum/drainage tube connected to the NPT drain.
3. A fluid-absorbing/transferring material that either surrounds the drain or is located next to it.
4. A draping layer with a single opening (perforation) that is at least partially covered by the fluid-absorbing/transferring material.
5. An airtight vapor sealant sheet covering at least part of the fluid-absorbing/transferring material, extending beyond its edges, and sealed to the draping layer.
6. A tube-anchorage component that touches the vapor sealant sheet and holds the vacuum/drainage tube in place, preventing movement of the NPT drain, and sealing the tube's exit.

Litigation Search

The Google Patents page for US10639404 states that the "Family has litigation" and specifically mentions:

• US case filed in Texas Western District Court (https://portal.unifiedpatents.com/litigation/Texas%20Western%20District%20Court/case/6%3A24-cv-00589)
• PTAB case IPR2025-01042 filed (Pending - Instituted) (https://portal.unifiedpatents.com/ptab/case/IPR2025-01042)

Searching the USPTO and CAFC dockets directly for "10639404" for new information:

• The USPTO provides a Patent Public Search tool, but general litigation data from the USPTO is often aggregated and updated periodically, such as the Patent Litigation Dataset which was updated as of March 2024 and covers cases filed during 1963-2020. For real-time or more recent litigation, it generally directs users to PACER (Public Access to Court Electronic Records). The Google Patents page already linked to a District Court case from 2024 and a PTAB case from 2025, which would be more recent than the USPTO's aggregated litigation dataset up to 2020.
• For the CAFC 2026 dockets, I searched for scheduled cases in April, May, and June 2026, and also for general case information. The results indicate how to access case records and scheduled cases, but no specific mention of patent 10639404 was found in the provided snippets. This means I do not have authoritative information directly stating active CAFC 2026 docket entries for this specific patent number from the search results, beyond the general availability of case schedules and information.

Therefore, based on the provided patent text and search results:

• USPTO Litigation: As of the information available via Google Patents, patent 10639404 is involved in a US district court case (6:24-cv-00589 in Texas Western District Court) and a PTAB case (IPR2025-01042), which is pending-instituted.
• CAFC 2026 Dockets: I do not have authoritative information from the provided search results confirming specific docket entries for patent 10639404 in the CAFC 2026 dockets. While the CAFC website provides access to scheduled cases and case records, my search did not yield direct hits for this patent number in the 2026 dockets.