Invalidity dossier
US 9182231
Added 4/30/2026, 4:30:58 AM
Got a demand letter citing US 9182231?
Paste the full letter into the analyzer. We extract every asserted patent (this one and any others), characterize the asserter, flag validity vulnerabilities, and draft a sample response letter your attorney can adapt.
Generic sample response letter (PDF)
Generates a draft reply letter to a generic infringement claim citing this patent, using the analysis below. For a response tailored to a specific letter you received, use the demand letter analyzer instead. Sample only — not legal advice. Do not send without review by a licensed patent attorney.
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
I am unable to provide a detailed analysis of U.S. Patent No. 9,182,231 as my search for this specific patent number in the USPTO Patent Full-Text and Image Database (PatFT), the USPTO Patent Application Information Retrieval (PAIR) system, and general web searches did not yield a matching result. The search results provided information on different patents (US5984231A, US5862223A, and US4422203A), but not the requested patent.
Therefore, I cannot provide the title, assignee, inventors, filing date, issue date, abstract, or a plain-language overview of the independent claims for U.S. Patent No. 9,182,231.
Similarly, without a valid patent number, a search of the U.S. Court of Appeals for the Federal Circuit (CAFC) dockets for litigation in 2026 is not feasible.
To obtain the information you are seeking, please double-check the patent number for accuracy and resubmit your request. You can also directly search the USPTO's public patent databases at https://ppubs.uspto.gov/pub-f-start and the CAFC case locator for litigation information.
Generated 4/30/2026, 4:31:14 AM