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Alpha-Alumina Powder

Patent No. EP2070873 (titled "Alpha-Alumina Powder") was filed by Sumitomo Chemical on Sep 18, 2007. The application was issued on May 20, 2015.

Patent Summary

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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
SASOL WAX GMBHFeb 22, 2016-
SASOL USAFeb 19, 2016MAIWALD PATENT- UND RECHTSANWALTSGESELLSCHAFT MBH

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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EP2070873

SUMITOMO CHEMICAL
Application Number
EP07807447A
Filing Date
Sep 18, 2007
Status
Opposition Rejected
Sep 23, 2020
Publication Date
May 20, 2015
External Links
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