The weekly litigation news digest is live. Subscribe now
The patent EP3854561 was granted to Alfi on Jan 3, 2024. The application was originally filed on Jan 22, 2021 under application number EP21153077A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
Oven for polymerizing mineral fiber mattresses with a unique box design featuring two openings of different lengths, allowing for efficient hot gas circulation and access to the interior. The box has a primary opening for hot gas entry and a secondary opening for exit, with secondary walls to concentrate and guide the gas flow. The oven features a dual-conveyor system with parallel heating zones, enabling precise temperature control and uniform polymerization of the mineral fiber mattresses.

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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
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.
Date
Description
Get instant alerts for new documents