Patent No. EP1311778 (titled "Seal Ring And Method Of Forming Micro-Topography Ring Surfaces With A Laser") was filed by Flowserve Management on Jul 5, 2001. The application was issued on Aug 29, 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 |
|---|---|---|
| KSB AKTIENGESELLSCHAFT | Jun 9, 2016 | BEHR |
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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