Patent No. EP2801559 (titled "Method Of Enhancing The Latent Hydraulic And/Or Pozzolanic Reactivity Of Materials") was filed by Heidelbergcement on Nov 28, 2013. The application was issued on Feb 3, 2016.

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 |
|---|---|---|
| KARLSRUHER INSTITUT FUR TECHNOLOGIECELITEMENT | Nov 2, 2016 | FDST PATENTANWALTE |
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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