Patent No. EP3990253 (titled "Method For Producing A Hollow Electrical Insulator, Hollow Electrical Insulator And Use Of A Hollow Electrical Insulator") was filed by Maschinenfabrik Reinhausen on May 26, 2020. The application was issued on Oct 9, 2024.

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 |
|---|---|---|
| SAVER S P A | Jun 27, 2025 | STELLBRINK & PARTNER |
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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