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The patent EP3764443 was granted to Heraeus Deutschland on Oct 19, 2022. The application was filed on Jul 10, 2019 under application number EP19185574A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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 |
|---|---|---|---|
| JOHNSON MATTHEY HYDROGEN | Jul 17, 2023 | GLEAVE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP2608297 |
| DESCRIPTION | EP2608298 |
| DESCRIPTION | EP2954951 |
| DESCRIPTION | WO2005049199 |
| EXAMINATION | WO2018077857 |
| OPPOSITION | US2017141405 |
| OPPOSITION | WO2005049199 |
| SEARCH | DE102017114030 |
| SEARCH | DE112010005334T |
| SEARCH | EP2575202 |
| SEARCH | US2011081599 |
| SEARCH | US2011223523 |
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.
Date
Description
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Jan 8, 2026
Jan 2, 2026
Dec 18, 2025
(Electronic) Receipt
Appeal
Dec 18, 2025
Dec 18, 2025
Dec 3, 2025
Nov 28, 2025
(Electronic) Receipt
Appeal
Nov 28, 2025
Nov 28, 2025
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Oct 31, 2025
(Electronic) Receipt
Appeal
Oct 31, 2025
Oct 31, 2025
Oct 10, 2025
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Oct 7, 2025
Oct 7, 2025
Aug 13, 2025
Aug 7, 2025
(Electronic) Receipt
Appeal
Aug 7, 2025
Aug 7, 2025
Jul 18, 2025
Jul 14, 2025
(Electronic) Receipt
Appeal
Jul 14, 2025
Jul 14, 2025
Jul 14, 2025
Jul 14, 2025
Jul 14, 2025
Jul 14, 2025
Jul 14, 2025
Description
Appeal
Jul 14, 2025
Description
Appeal
Jul 14, 2025
Jul 14, 2025
Reply to appeal
Appeal
Mar 13, 2025
Mar 7, 2025
(Electronic) Receipt
Appeal
Mar 7, 2025
Mar 7, 2025
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Jan 8, 2025
(Electronic) Receipt
Appeal
Jan 8, 2025
Notice of appeal
Appeal
Jan 8, 2025
Notice of appeal
Appeal
Dec 6, 2024
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Means of redress
OPPO
Nov 15, 2024
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Dec 23, 2022
Dec 19, 2022
Letter accompanying subsequently filed items
Search/Exam
Dec 19, 2022
Nov 2, 2022
Oct 13, 2022
Document concerning representation
Search/Exam
Sep 22, 2022
Decision to grant a European patent
Search/Exam
Sep 7, 2022
(Electronic) Receipt
Search/Exam
Sep 7, 2022
English translation of the claims
Search/Exam
Sep 7, 2022
Filing of the translations of the claims
Search/Exam
Sep 7, 2022
French translation of claims
Search/Exam
May 27, 2022
May 27, 2022
May 27, 2022
Intention to grant (signatures)
Search/Exam
May 27, 2022
Text intended for grant (clean copy)
Search/Exam
May 27, 2022
Apr 27, 2022
Examination started
Search/Exam
Feb 1, 2022
Jan 19, 2022
(Electronic) Receipt
Search/Exam
Jan 19, 2022
Enquiry as to the processing of the file
Search/Exam
Jan 19, 2022
Letter accompanying subsequently filed items
Search/Exam
Jul 13, 2021
(Electronic) Receipt
Search/Exam
Jul 13, 2021
Jul 13, 2021
Amended claims with annotations
Search/Exam
Jul 13, 2021
Jul 13, 2021
Amended description with annotations
Search/Exam
Jul 13, 2021
Amendments received before examination
Search/Exam
Jul 13, 2021
Letter accompanying subsequently filed items
Search/Exam
Jan 18, 2021
Dec 16, 2020
Notification of forthcoming publication
Search/Exam
Jan 21, 2020
Jan 21, 2020
European search opinion
Search/Exam
Jan 21, 2020
European search report
Search/Exam
Jan 21, 2020
Information on Search Strategy
Search/Exam
Jan 9, 2020
Search started
Search/Exam
Sep 2, 2019
Communication to designated inventor
Search/Exam
Sep 2, 2019
Communication to designated inventor
Search/Exam
Jul 10, 2019
Abstract
Search/Exam
Jul 10, 2019
Jul 10, 2019
Claims
Search/Exam
Jul 10, 2019
Description
Search/Exam
Jul 10, 2019
Designation of inventor
Search/Exam
Jul 10, 2019
Request for grant of a European patent
Search/Exam