IP Verse

Piston Ring

Patent No. EP3421846 (titled "Piston Ring") was filed by Kabushiki Kaisha Riken on Feb 21, 2017. The application was issued on Nov 18, 2020.

Patent Summary

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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 DateRepresentative
MAHLEAug 17, 2021BRP RENAUD & PARTNER MBB RECHTSANWALTE PATENTANWALTE STEUERBERATER

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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EP3421846

KABUSHIKI KAISHA RIKEN
Application Number
EP17756486A
Filing Date
Feb 21, 2017
Status
Opposition Rejected
Jun 16, 2023
Publication Date
Nov 18, 2020
External Links
Slate, EP3421846B1, Google Patents