Patent No. EP3826493 (titled "A Method Of Controlling Heating In An Aerosol-Generating System") was filed by Philip Morris on Jul 19, 2019. The application was issued on Jun 25, 2025.

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 |
|---|---|---|
| NICOVENTURES | Mar 29, 2023 | DEHNS |
| JUUL LABS | Mar 28, 2023 | PETERREINS SCHLEY |
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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