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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 filed on Dec 27, 2018 under application number EP18934351A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

EP3854990

CHINA RAILWAY CONSTRUCTION HEAVY INDUSTRY
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 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.

CompanyOpposition DateRepresentativeOpposition Status
HERRENKNECHTJun 27, 2024KLICKOW & WETZEL PARTGMBBADMISSIBLE

Patent Citations (10) New

Patent citations refer to prior patents cited during different phases such as opposition or international search.

Citation PhasePublication Number
OPPOSITIONCN106223964
OPPOSITIONCN107401678
OPPOSITIONCN107420109
OPPOSITIONCN202194668U
OPPOSITIONCN207049619U
OPPOSITIONDE102015209428
OPPOSITIONDE4434261
OPPOSITIONUS4984811
SEARCHCN106223964B
SEARCHCN207049619U

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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    Description

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