The patent EP2801244 was granted to Hypertherm on Apr 15, 2020. The application was originally filed on Dec 6, 2012 under application number EP12801696A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US4902871 |
| DESCRIPTION | US5994663 |
| DESCRIPTION | US6133543 |
| DESCRIPTION | US6403915 |
| INTERNATIONAL-SEARCH-REPORT | US3210586 |
| INTERNATIONAL-SEARCH-REPORT | WO2007098144 |
| INTERNATIONAL-SEARCH-REPORT | WO8805704 |
| OPPOSITION | DE3879689T |
| OPPOSITION | DE69308448T |
| OPPOSITION | EP0266041 |
| OPPOSITION | US1898441 |
| OPPOSITION | US2002117482 |
| OPPOSITION | US2008217305 |
| OPPOSITION | US2683791 |
| OPPOSITION | US3004189 |
| OPPOSITION | US3210586 |
| OPPOSITION | US3242305 |
| OPPOSITION | US4701590 |
| OPPOSITION | US4902871 |
| OPPOSITION | US5938949 |
| OPPOSITION | US5995663 |
| OPPOSITION | US6133543 |
| OPPOSITION | US6403915 |
| OPPOSITION | WO2007098144 |
| OPPOSITION | WO2011019531 |
| OPPOSITION | WO8805704 |
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Date
Description
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Mar 19, 2020
Mar 19, 2020
Mar 12, 2020
Mar 3, 2020
Mar 3, 2020
Mar 3, 2020
Mar 3, 2020
Mar 3, 2020
Dec 3, 2019
Dec 3, 2019
Dec 3, 2019
Nov 27, 2019
Refund of fees
Appeal
Nov 25, 2019
Nov 22, 2019
Nov 18, 2019
Nov 14, 2019
Nov 13, 2019
(Electronic) Receipt
Appeal
Nov 13, 2019
Nov 13, 2019
Withdrawal of an appeal
Appeal
Sep 27, 2019
Sep 27, 2019
Sep 6, 2019
(Electronic) Receipt
Appeal
Sep 6, 2019
Sep 6, 2019
Notice of appeal
Appeal
Aug 12, 2019
Aug 1, 2019
Jul 18, 2019
Jul 9, 2019
Jul 3, 2019
Jul 3, 2019
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Means of redress
OPPO
Jul 3, 2019
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Claims
OPPO
Feb 12, 2019
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Claims
OPPO
Aug 16, 2018
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Feb 20, 2018
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Jun 22, 2017
May 26, 2017
Decision to grant a European patent
Search/Exam
May 3, 2017
(Electronic) Receipt
Search/Exam
May 3, 2017
Filing of the translations of the claims
Search/Exam
May 3, 2017
French translation of claims
Search/Exam
May 3, 2017
German translation of the claims
Search/Exam
May 3, 2017
Letter accompanying subsequently filed items
Search/Exam
Jan 25, 2017
Jan 25, 2017
Jan 25, 2017
Intention to grant (signatures)
Search/Exam
Jan 25, 2017
Text intended for grant (clean copy)
Search/Exam
Jan 25, 2017
Dec 20, 2016
(Electronic) Receipt
Search/Exam
Dec 20, 2016
Amended claims with annotations
Search/Exam
Dec 20, 2016
Claims
Search/Exam
Dec 20, 2016
Letter accompanying subsequently filed items
Search/Exam
Dec 20, 2016
Matter concerning the application
Search/Exam
Sep 20, 2016
(Electronic) Receipt
Search/Exam
Sep 20, 2016
Amended claims with annotations
Search/Exam
Sep 20, 2016
Amended description with annotations
Search/Exam
Sep 20, 2016
Claims
Search/Exam
Sep 20, 2016
Description
Search/Exam
Sep 20, 2016
Letter accompanying subsequently filed items
Search/Exam
Sep 20, 2016
May 10, 2016
Annex to the communication
Search/Exam
May 10, 2016
Communication from the Examining Division
Search/Exam
May 2, 2016
Examination started
Search/Exam
Nov 5, 2014
Communication to designated inventor
Search/Exam
Oct 29, 2014
(Electronic) Receipt
Search/Exam
Oct 29, 2014
Letter accompanying subsequently filed items
Search/Exam
Oct 29, 2014
Letter concerning the inventor
Search/Exam
Oct 15, 2014
Sep 4, 2014
Aug 26, 2014
Letter which had not been notified
Search/Exam
Aug 14, 2014
Aug 13, 2014
Refund of fees
Search/Exam
Aug 11, 2014
Communication to designated inventor
Search/Exam
Aug 11, 2014
Communication to designated inventor
Search/Exam
Aug 11, 2014
Communication to designated inventor
Search/Exam
Aug 11, 2014
Communication to designated inventor
Search/Exam
Aug 11, 2014
Communication to designated inventor
Search/Exam
Aug 11, 2014
Communication to designated inventor
Search/Exam
Aug 11, 2014
Communication to designated inventor
Search/Exam
Jul 22, 2014
Jul 16, 2014
(Electronic) Receipt
Search/Exam
Jul 16, 2014
Jul 16, 2014
Amended claims with annotations
Search/Exam
Jul 16, 2014
Request for entry into the European phase
Search/Exam
May 16, 2014
Information on entry into European phase
Search/Exam
Jul 30, 2013
Jul 11, 2013
Copy of the international search report
Search/Exam
Jul 11, 2013
Published international application - A1
Search/Exam
Jun 12, 2013
Jun 12, 2013
Jun 12, 2013