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Main Drive High-Pressure Sealing System For Shield Machine And Slurry Balance Shield Machine - EP3854990
The patent EP3854990 was granted to China Railway Construction Heavy Industry on Sep 27, 2023. The application was originally filed on Dec 27, 2018 under application number EP18934351A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
EP3854990
- Application Number
- EP18934351A
- Filing Date
- Dec 27, 2018
- Status
- Granted And Under Opposition
- Aug 25, 2023
- Publication Date
- Sep 27, 2023
- External Links
- Slate, Register, Google Patents
Patent Summary
Patent Family
Patent Oppositions
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.
Patent Citations (10) New
Patent citations refer to prior patents cited during different phases such as opposition or international search.
Dossier Documents
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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