Prior art

I will now search the USPTO database for patent 12239333 and then analyze its cited prior art.

Prior art is crucial in patent examination to assess the novelty and non-obviousness of an invention. It encompasses any information publicly available before the patent application's filing date, including other patents, publications, products, and public knowledge. Patent examiners use prior art to determine if an invention is already known or obvious, and a thorough search considers various data sources beyond just patent documents.

USPTO Patent 12239333 Search Results:

As of May 28, 2026, searching the USPTO database for patent number 12239333 directly should yield information about "Single insertion delivery system for treating embolism and associated systems and methods" assigned to Inari Medical Inc.. The patent was granted on March 4, 2025.

To identify the most relevant prior art, I will examine the citations listed within US patent 12239333. The full patent text indicates that it incorporates by reference U.S. Pat. No. 9,526,864, filed Jun. 9, 2015, and titled "RETRACTION AND ASPIRATION DEVICE FOR TREATING EMBOLISM AND ASSOCIATED METHODS." This is a primary piece of prior art.

Most Relevant Prior Art for US Patent 12239333:

Based on the provided patent text, the most explicitly referenced prior art is:

1. Full Citation: U.S. Patent No. 9,526,864, titled "RETRACTION AND ASPIRATION DEVICE FOR TREATING EMBOLISM AND ASSOCIATED METHODS."
2. Publication/Filing Date: Filed June 9, 2015.
3. Brief Description: This patent describes retraction and aspiration devices, catheter systems, and tubing systems that are "the same as or similar to" those used in the clot retrieval system 1 of US12239333B2. Specifically, it covers components like the RA device 100, catheter system 200, and tubing system 300, which are designed to simultaneously retract a portion of the catheter system and aspirate through it to remove material like blood and clot.
4. Potential Anticipation (35 U.S.C. § 102):
   • Claims 1, 9, and 16 (in part): U.S. Patent 9,526,864 potentially anticipates aspects of claims 1, 9, and 16 of US12239333B2 related to the fundamental components of a retraction and aspiration system, specifically the RA device, catheter system, and tubing system for treating embolisms via simultaneous retraction and aspiration. The new patent (US12239333B2) builds upon this foundation by introducing specific advancements related to single insertion and managing multiple passes, particularly concerning the attachment/valve member and valve inserts to prevent clot stripping and allow for redeployment of the interventional device without fully removing the guide catheter. The "single insertion" and "repeated deployment" aspects, along with the detailed mechanisms for preventing clot stripping during withdrawal and re-advancement, appear to be the distinguishing features of 12239333 over 9,526,864, according to the description. Without a detailed claim comparison to 9,526,864, it's difficult to pinpoint exact claim elements that are directly anticipated, but the core functionality of a retraction and aspiration system for embolism treatment is clearly present in the earlier patent.