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The patent EP3506039 was granted to Kubota on Mar 12, 2025. The application was filed on Nov 16, 2018 under application number EP18206747A. 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 |
|---|---|---|---|
| KILBURN & STRODE | Feb 23, 2023 | KORENBERG | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | JP2013164742 |
| DESCRIPTION | JP2016010382 |
| OPPOSITION | EP2946650 |
| OPPOSITION | EP3427562 |
| OPPOSITION | EP3444694 |
| OPPOSITION | EP3491906 |
| OPPOSITION | EP3495910 |
| OPPOSITION | EP3557359 |
| OPPOSITION | EP3603370 |
| OPPOSITION | GB2517572 |
| OPPOSITION | JP2017167838 |
| OPPOSITION | US2003144774 |
| OPPOSITION | US2016026185 |
| OPPOSITION | US2016091898 |
| OPPOSITION | US2016165795 |
| OPPOSITION | US2017168501 |
| OPPOSITION | WO2017154715 |
| OPPOSITION | WO2017167207 |
| OPPOSITION | WO2017177978 |
| OPPOSITION | WO2018055922 |
| OPPOSITION | WO2018086612 |
| OPPOSITION | WO2018108178 |
| OPPOSITION | WO2018108179 |
| OPPOSITION | WO2018139024 |
| OPPOSITION | WO2018153599 |
| OPPOSITION | WO2018224678 |
| OPPOSITION | WO2019185930 |
| OPPOSITION | WO2020030066 |
| SEARCH | EP2926642 |
| SEARCH | US2003144774 |
| SEARCH | US2017020064 |
| SEARCH | WO2017204052 |
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
Apr 14, 2022
(Electronic) Receipt
Search/Exam
Apr 14, 2022
Filing of the translations of the claims
Search/Exam
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French translation of claims
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German translation of the claims
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Intention to grant (signatures)
Search/Exam
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Text intended for grant (clean copy)
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(Electronic) Receipt
Search/Exam
Jun 16, 2021
Amended claims with annotations
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Amended description with annotations
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Jun 16, 2021
Claims
Search/Exam
Jun 16, 2021
Description
Search/Exam
Jun 16, 2021
Letter accompanying subsequently filed items
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Jun 16, 2021
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Annex to the communication
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Feb 8, 2021
Communication from the Examining Division
Search/Exam
Feb 3, 2021
Examination started
Search/Exam
Jan 3, 2020
(Electronic) Receipt
Search/Exam
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Amended claims with annotations
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Amended description with annotations
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Amendments received before examination
Search/Exam
Jan 3, 2020
Letter accompanying subsequently filed items
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Jul 8, 2019
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Notification of forthcoming publication
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European search opinion
Search/Exam
May 24, 2019
European search report
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May 24, 2019
Information on Search Strategy
Search/Exam
May 7, 2019
Search started
Search/Exam
Jan 23, 2019
Jan 17, 2019
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Nov 16, 2018
Abstract
Search/Exam
Nov 16, 2018
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Claims
Search/Exam
Nov 16, 2018
Description
Search/Exam
Nov 16, 2018
Designation of inventor
Search/Exam
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Drawings
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Nov 16, 2018
Request for grant of a European patent
Search/Exam