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The patent EP3498918 was granted to Wirtgen on Jan 1, 2025. The application was filed on Dec 10, 2018 under application number EP18211381A. 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 |
|---|---|---|---|
| CATERPILLAR | Mar 10, 2021 | BOULT WADE TENNANT | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | DE19638812 |
| OPPOSITION | EP0939166 |
| OPPOSITION | JP2012126248 |
| OPPOSITION | US2007138822 |
| OPPOSITION | US3992070 |
| OPPOSITION | US4253537 |
| OPPOSITION | US4979774 |
| OPPOSITION | US6474431 |
| SEARCH | EP0810324 |
| SEARCH | EP2650437 |
| SEARCH | JP2009299338 |
| SEARCH | US5165262 |
| SEARCH | US5190398 |
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
May 5, 2020
(Electronic) Receipt
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May 5, 2020
English translation of the claims
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May 5, 2020
Filing of the translations of the claims
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French translation of claims
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Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Examination started
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Amended description with annotations
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Dec 16, 2019
Amendments received before examination
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Dec 16, 2019
Letter accompanying subsequently filed items
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Jun 25, 2019
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Notification of forthcoming publication
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Communication to designated inventor
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May 13, 2019
(Electronic) Receipt
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May 13, 2019
Letter accompanying subsequently filed items
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May 13, 2019
Letter concerning the inventor
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Letter which had not been notified
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European search opinion
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European search report
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Feb 14, 2019
Information on Search Strategy
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Feb 2, 2019
Modified abstract
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Feb 1, 2019
Communication to designated inventor
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Communication to designated inventor
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Feb 1, 2019
Communication to designated inventor
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Jan 28, 2019
Search started
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Dec 17, 2018
Letter concerning the priority
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Dec 17, 2018
Priority document
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Dec 10, 2018
Abstract
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Dec 10, 2018
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Claims
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Dec 10, 2018
Description
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Dec 10, 2018
Designation of inventor
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Dec 10, 2018
Drawings
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Dec 10, 2018
Request for grant of a European patent
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