Patent No. EP3664645 (titled "Aerosol Generating System With Multiple Inductor Coils") was filed by Philip Morris on Aug 9, 2018. The application was issued on Jul 22, 2026.
An aerosol-generating system comprises an aerosol-generating device and an article containing an aerosol-forming substrate and a mouthpiece. The device features a housing with a chamber having an open end for article insertion and a closed end opposite. The chamber defines a heating zone surrounded or flanked by two coils: a first drive coil couplable to an alternating current source and a second resonant coil of a resonant circuit. The second coil is inductively couplable to the first, potentially forming a resonant inductive coupling to increase current flow and magnetic field strength for improved efficiency. The system may further include a power supply, a controller for independent coil operation, and an elongate susceptor element inductively heated by the coils to heat the substrate.

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| Company | Opposition Date | Representative |
|---|---|---|
| NICOVENTURES TRADING LIMITED | Mar 22, 2022 | DEHNS |
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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