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The patent EP1558431 was granted to Kennametal on May 3, 2017. The application was filed on Oct 17, 2003 under application number EP03809160A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| ISCAR | Feb 5, 2018 | VOSSIUS & PARTNER | - |
| ISCAR | Feb 5, 2018 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0716895 |
| DESCRIPTION | EP0958873 |
| DESCRIPTION | US3654681 |
| DESCRIPTION | US3815191 |
| DESCRIPTION | US3973308 |
| DESCRIPTION | US4629372 |
| INTERNATIONAL-SEARCH-REPORT | US4992008 |
| INTERNATIONAL-SEARCH-REPORT | US5085541 |
| INTERNATIONAL-SEARCH-REPORT | US5375948 |
| INTERNATIONAL-SEARCH-REPORT | US5827017 |
| OPPOSITION | DE29807877U |
| OPPOSITION | EP0865851 |
| OPPOSITION | EP1483080 |
| OPPOSITION | JP2001322010 |
| OPPOSITION | JPH06320305 |
| OPPOSITION | US4629372 |
| OPPOSITION | US4778311 |
| OPPOSITION | US4832541 |
| OPPOSITION | US4969779 |
| OPPOSITION | US4992008 |
| OPPOSITION | US5076739 |
| OPPOSITION | US5375948 |
| OPPOSITION | US5423639 |
| OPPOSITION | US5511911 |
| OPPOSITION | US5676495 |
| OPPOSITION | US5704737 |
| OPPOSITION | US5758994 |
| OPPOSITION | US5827017 |
| OPPOSITION | US6086291 |
| OPPOSITION | US6135678 |
| OPPOSITION | US6238147 |
| OPPOSITION | US6249950 |
| OPPOSITION | WO0013824 |
| OPPOSITION | WO9219402 |
| OPPOSITION | WO9608330 |
| SEARCH | EP0716895 |
| SEARCH | EP0958873 |
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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May 3, 2017
Apr 6, 2017
Decision to grant a European patent
Search/Exam
Mar 21, 2017
Filing of the translations of the claims
Search/Exam
Mar 21, 2017
French translation of claims
Search/Exam
Mar 21, 2017
German translation of the claims
Search/Exam
Mar 21, 2017
Payment of fees and costs
Search/Exam
Feb 1, 2017
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Intention to grant (signatures)
Search/Exam
Feb 1, 2017
Text intended for grant (clean copy)
Search/Exam
Feb 1, 2017
Dec 16, 2016
Amended claims with annotations
Search/Exam
Dec 16, 2016
Amended description with annotations
Search/Exam
Dec 16, 2016
Claims
Search/Exam
Dec 16, 2016
Description
Search/Exam
Dec 16, 2016
Aug 9, 2016
Annex to the communication
Search/Exam
Aug 9, 2016
Communication from the Examining Division
Search/Exam
Sep 19, 2014
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Aug 25, 2014
General enquiry
Search/Exam
Jun 13, 2014
CDS Clean up - amended applicant details
Search/Exam
May 30, 2011
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Claims
Search/Exam
Apr 30, 2011
Apr 27, 2011
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Annex to the communication
Search/Exam
Nov 26, 2010
Communication from the Examining Division
Search/Exam
Jan 27, 2010
Dec 17, 2009
Jun 5, 2008
Maintenance of the application
Search/Exam
May 6, 2008
Apr 18, 2008
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Supplementary European search report
Search/Exam
Apr 5, 2007
Copy of the international search report
Search/Exam
Apr 5, 2007
Jan 15, 2007
Enquiry with the International Bureau
Search/Exam
Jan 5, 2007
Claims
Search/Exam
Jan 5, 2007
General enquiry
Search/Exam
Oct 26, 2005
Jun 22, 2005
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Apr 21, 2005
Request for entry into the European phase
Search/Exam
Mar 4, 2005
Information on entry into European phase
Search/Exam
Jul 22, 2004
Copy of the international search report
Search/Exam
Jul 22, 2004
May 28, 2004
Apr 29, 2004
Published international application - A2
Search/Exam