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The patent EP3271151 was granted to Hewlett Packard on Feb 19, 2025. The application was filed on Jul 30, 2015 under application number EP15899878A. 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 |
|---|---|---|---|
| VOXELJET | Jan 26, 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 | US2004003741 |
| INTERNATIONAL-SEARCH-REPORT | US2010244333 |
| INTERNATIONAL-SEARCH-REPORT | US2014314613 |
| INTERNATIONAL-SEARCH-REPORT | US2014348692 |
| INTERNATIONAL-SEARCH-REPORT | WO2015108543 |
| OPPOSITION | US2014314613 |
| OPPOSITION | WO2007114895 |
| OPPOSITION | WO2013021173 |
| SEARCH | US2014314613 |
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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Nov 28, 2024
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Refund of fees
Appeal
Nov 18, 2024
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Nov 15, 2024
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Nov 7, 2024
(Electronic) Receipt
Appeal
Nov 7, 2024
Nov 7, 2024
Withdrawal of an appeal
Appeal
Sep 16, 2024
Sep 9, 2024
(Electronic) Receipt
Appeal
Sep 9, 2024
(Electronic) Receipt
Appeal
Sep 9, 2024
Sep 9, 2024
Notice of appeal
Appeal
Sep 9, 2024
Notice of appeal
Appeal
Sep 9, 2024
Notice of appeal
Appeal
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Means of redress
OPPO
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Mar 31, 2022
Decision to grant a European patent
Search/Exam
Mar 16, 2022
(Electronic) Receipt
Search/Exam
Mar 16, 2022
Filing of the translations of the claims
Search/Exam
Mar 16, 2022
French translation of claims
Search/Exam
Mar 16, 2022
German translation of the claims
Search/Exam
Mar 16, 2022
Letter accompanying subsequently filed items
Search/Exam
Nov 15, 2021
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Intention to grant (signatures)
Search/Exam
Nov 15, 2021
Text intended for grant (clean copy)
Search/Exam
Nov 15, 2021
Mar 29, 2021
(Electronic) Receipt
Search/Exam
Mar 29, 2021
Amended claims with annotations
Search/Exam
Mar 29, 2021
Claims
Search/Exam
Mar 29, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 29, 2021
Feb 9, 2021
Document concerning representation
Search/Exam
Nov 30, 2020
Annex to the communication
Search/Exam
Nov 30, 2020
Communication from the Examining Division
Search/Exam
Nov 25, 2020
Examination started
Search/Exam
Apr 16, 2019
Mar 29, 2019
Request for correction of client data
Search/Exam
Mar 8, 2019
(Electronic) Receipt
Search/Exam
Mar 8, 2019
Mar 8, 2019
Amended claims with annotations
Search/Exam
Mar 8, 2019
Mar 8, 2019
Amended description with annotations
Search/Exam
Mar 8, 2019
Amendments received before examination
Search/Exam
Mar 8, 2019
Letter accompanying subsequently filed items
Search/Exam
Mar 6, 2019
Mar 6, 2019
Feb 27, 2019
(Electronic) Receipt
Search/Exam
Feb 27, 2019
Authorisation
Search/Exam
Feb 27, 2019
Letter accompanying subsequently filed items
Search/Exam
Feb 27, 2019
Nov 13, 2018
Oct 25, 2018
Oct 25, 2018
European search opinion
Search/Exam
Oct 25, 2018
Information on Search Strategy
Search/Exam
Oct 25, 2018
Supplementary European search report
Search/Exam
Oct 10, 2018
Search started
Search/Exam
Apr 10, 2018
Submission concerning representation
Search/Exam
Mar 5, 2018
Communication to designated inventor
Search/Exam
Mar 5, 2018
Communication to designated inventor
Search/Exam
Mar 5, 2018
Communication to designated inventor
Search/Exam
Mar 5, 2018
Communication to designated inventor
Search/Exam
Mar 5, 2018
Communication to designated inventor
Search/Exam
Feb 12, 2018
Jan 4, 2018
Nov 14, 2017
Nov 9, 2017
Communication to designated inventor
Search/Exam
Nov 9, 2017
Communication to designated inventor
Search/Exam
Nov 9, 2017
Communication to designated inventor
Search/Exam
Nov 9, 2017
Communication to designated inventor
Search/Exam
Nov 9, 2017
Communication to designated inventor
Search/Exam
Nov 9, 2017
Information regarding early processing
Search/Exam
Oct 20, 2017
(Electronic) Receipt
Search/Exam
Oct 20, 2017
Request for entry into the European phase
Search/Exam
Feb 2, 2017
Copy of the international search report
Search/Exam
Feb 2, 2017
Published international application - A1
Search/Exam