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The patent EP3538795 was granted to Hutchinson on Aug 13, 2025. The application was filed on Nov 10, 2016 under application number EP16816327A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

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 |
|---|---|---|---|
| CARL FREUDENBERG | Oct 17, 2023 | HOEFER & PARTNER PATENTANWALTE MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | US2003207657 |
| INTERNATIONAL-SEARCH-REPORT | US2007297901 |
| INTERNATIONAL-SEARCH-REPORT | US2011017006 |
| INTERNATIONAL-SEARCH-REPORT | US2016146348 |
| INTERNATIONAL-SEARCH-REPORT | WO2012161259 |
| OPPOSITION | DE102009039279 |
| OPPOSITION | DE112016001146T |
| OPPOSITION | EP0731181 |
| OPPOSITION | EP1830086 |
| OPPOSITION | EP3051157 |
| OPPOSITION | JP2003184897 |
| OPPOSITION | JP2004353710 |
| OPPOSITION | JP2016023669 |
| OPPOSITION | US2003207657 |
| OPPOSITION | US2007297901 |
| OPPOSITION | US2011017006 |
| OPPOSITION | US2016146348 |
| OPPOSITION | WO2012161259 |
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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Description
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Decision to grant a European patent
Search/Exam
Dec 7, 2022
(Electronic) Receipt
Search/Exam
Dec 7, 2022
English translation of the claims
Search/Exam
Dec 7, 2022
Filing of the translations of the claims
Search/Exam
Dec 7, 2022
German translation of the claims
Search/Exam
Dec 7, 2022
Letter accompanying subsequently filed items
Search/Exam
Sep 16, 2022
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Intention to grant (signatures)
Search/Exam
Sep 16, 2022
Text intended for grant (clean copy)
Search/Exam
Sep 16, 2022
Mar 16, 2021
(Electronic) Receipt
Search/Exam
Mar 16, 2021
Abstract
Search/Exam
Mar 16, 2021
Abstract
Search/Exam
Mar 16, 2021
Amended claims with annotations
Search/Exam
Mar 16, 2021
Amended description with annotations
Search/Exam
Mar 16, 2021
Claims
Search/Exam
Mar 16, 2021
Description
Search/Exam
Mar 16, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 16, 2021
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Annex to the communication
Search/Exam
Nov 19, 2020
Communication from the Examining Division
Search/Exam
Nov 12, 2020
Examination started
Search/Exam
Dec 11, 2019
(Electronic) Receipt
Search/Exam
Dec 11, 2019
Letter accompanying subsequently filed items
Search/Exam
Dec 11, 2019
Reply to Written Opinion prepared by the EPO
Search/Exam
Nov 26, 2019
Payment submission rejected
Search/Exam
Aug 21, 2019
Jun 18, 2019
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Communication to designated inventor
Search/Exam
Jun 14, 2019
Communication to designated inventor
Search/Exam
Jun 14, 2019
Communication to designated inventor
Search/Exam
Jun 4, 2019
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(Electronic) Receipt
Search/Exam
May 6, 2019
Request for entry into the European phase
Search/Exam
Mar 22, 2019
Information on entry into European phase
Search/Exam
May 17, 2018
Copy of the international search report
Search/Exam
May 17, 2018
Copy of the international search report
Search/Exam
May 17, 2018
Published international application - A1
Search/Exam
Jul 26, 2017
ISR: cited documents
PCTISA
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Abstract
PCTISA
Nov 10, 2016
Claims
PCTISA
Nov 10, 2016
Description
PCTISA
Nov 10, 2016
Drawings
PCTISA