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IP Verse

Polyacrylic Acid (Polyacrylate) Superabsorbent Polymer Powder

Patent No. EP3520978 (titled "Polyacrylic Acid (Polyacrylate) Superabsorbent Polymer Powder") was filed by Nippon Shokubai on Aug 28, 2014. The application was issued on Nov 4, 2020.

Patent Summary

Patent Family

Patent Family

Patent Oppositions (2)

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
EVONIK SUPERABSORBERJul 28, 2021VOLLMER
STOCKHAUSEN SUPERABSORBERJul 28, 2021OFFICE FREYLINGER

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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EP3520978

NIPPON SHOKUBAI
Application Number
EP19165778A
Filing Date
Aug 28, 2014
Status
Granted And Under Opposition
Oct 2, 2020
Publication Date
Nov 4, 2020
External Links
Slate, EP3520978B1, Google Patents