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The patent EP3526177 was granted to Coorstek on Jun 9, 2021. The application was filed on May 12, 2017 under application number EP17729576A. The patent is currently recorded with a legal status of "Opposition Rejected".

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.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| HERAEUS CONAMIC NORTH AMERICA | Mar 9, 2022 | GILLE HRABAL PARTNERSCHAFTSGESELLSCHAFT MBB PATENTANWALTE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP1119026 |
| INTERNATIONAL-SEARCH-REPORT | EP1158072 |
| INTERNATIONAL-SEARCH-REPORT | US2006073349 |
| INTERNATIONAL-SEARCH-REPORT | US2008169588 |
| INTERNATIONAL-SEARCH-REPORT | US7462407 |
| INTERNATIONAL-SEARCH-REPORT | WO2017087474 |
| OPPOSITION | JP2005170728 |
| OPPOSITION | JP4688307B |
| OPPOSITION | US2003232221 |
| OPPOSITION | US2013023401 |
| OPPOSITION | US2016333471 |
| OPPOSITION | US7582367 |
| OPPOSITION | US8367227 |
| OPPOSITION | WO2015108277 |
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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Decision to grant a European patent
Search/Exam
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(Electronic) Receipt
Search/Exam
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French translation of claims
Search/Exam
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German translation of the claims
Search/Exam
Apr 16, 2021
Letter accompanying subsequently filed items
Search/Exam
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Text intended for grant (clean copy)
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(Electronic) Receipt
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Amended description with annotations
Search/Exam
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Description
Search/Exam
Jan 7, 2021
Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
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Text intended for grant (clean copy)
Search/Exam
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Examination started
Search/Exam
May 29, 2020
Document concerning representation
Search/Exam
Jul 24, 2019
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Communication to designated inventor
Search/Exam
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Communication to designated inventor
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Communication to designated inventor
Search/Exam
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(Electronic) Receipt
Search/Exam
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Amended claims with annotations
Search/Exam
May 13, 2019
Amendments received before examination
Search/Exam
May 13, 2019
Request for entry into the European phase
Search/Exam
Mar 29, 2019
Information on entry into European phase
Search/Exam
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Notification of the recording of a change
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Copy of the international search report
Search/Exam
May 24, 2018
Published international application - A1
Search/Exam
Nov 21, 2017
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PCTISA
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Abstract
PCTISA
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Annex
PCTISA
May 22, 2017
Claims
PCTISA
May 22, 2017
Description
PCTISA
May 22, 2017
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PCTISA
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