Patent No. EP2151676 (titled "Method For Operating An Electronic Heating Cost Distributor And Electronic Heating Cost Distributor Operated According To The Method") was filed by Metrona Union on Jul 31, 2009. The application was issued on Feb 28, 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 |
|---|---|---|
| ISTA | Nov 28, 2018 | COHAUSZ HANNIG BORKOWSKI WISSGOTT |
| TECHEM ENERGY SERVICES | Nov 27, 2018 | KEIL & SCHAAFHAUSEN PATENTANWALTE PARTGMBB |
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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