Patent No. EP4225064 (titled "Aerosol-Generating Article With Upstream Section, Hollow Tubular Element And Mouthpiece Element") was filed by Philip Morris on Aug 26, 2021. The application was issued on Dec 4, 2024.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| IMPERIAL TOBACCO | Sep 4, 2025 | MEWBURN ELLIS |
| JAPAN TOBACCO | Sep 4, 2025 | GILL JENNINGS & EVERY |
| NICOVENTURES | Sep 3, 2025 | VENNER SHIPLEY |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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