Patent No. EP2654469 (titled "An Aerosol Generating System Having Means For Determining Depletion Of A Liquid Substrate") was filed by Philip Morris on Dec 22, 2011. The application was issued on Mar 22, 2017.

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 |
|---|---|---|
| JAPAN TOBACCO | Dec 22, 2017 | BANDPAY & GREUTER |
| BRITISH AMERICAN TOBACCO | Dec 14, 2017 | D YOUNG |
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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