Patent No. EP2521436 (titled "Greenhouse And Forced Greenhouse Climate Control System And Method") was filed by Glass Investments Projects on May 7, 2010. The application was issued on Jan 10, 2018.

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 |
|---|---|---|
| VAN DER HOEVEN HORTICULTURAL PROJECTS | Mar 27, 2018 | CRAMWINCKEL |
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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