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The patent EP2746375 was granted to Chemische Fabrik DR Weigert on Jul 28, 2021. The application was filed on Dec 20, 2012 under application number EP12198630A. 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 |
|---|---|---|---|
| BORER CHEMIE | Apr 28, 2022 | KELLER SCHNEIDER PATENT UND MARKENANWALTE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| OPPOSITION | EP0028674 |
| OPPOSITION | EP1839681 |
| OPPOSITION | EP1935366 |
| OPPOSITION | US2005079097 |
| OPPOSITION | US2009197790 |
| OPPOSITION | US2012316097 |
| OPPOSITION | US6235692 |
| OPPOSITION | US6387858 |
| OPPOSITION | US6562296 |
| OPPOSITION | WO9804666 |
| SEARCH | US2005079097 |
| SEARCH | US2009197790 |
| SEARCH | US2012316097 |
| SEARCH | US6235692 |
| SEARCH | US6387858 |
| SEARCH | US6562296 |
| SEARCH | WO9804666 |
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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Means of redress
OPPO
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Information concerning oral proceedings
Search/Exam
Sep 28, 2023
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Aug 10, 2021
Jul 1, 2021
Decision to grant a European patent
Search/Exam
Jun 17, 2021
(Electronic) Receipt
Search/Exam
Jun 17, 2021
English translation of the claims
Search/Exam
Jun 17, 2021
Filing of the translations of the claims
Search/Exam
Jun 17, 2021
French translation of claims
Search/Exam
Apr 22, 2021
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Apr 22, 2021
Intention to grant (signatures)
Search/Exam
Apr 22, 2021
Text intended for grant (clean copy)
Search/Exam
Apr 22, 2021
Mar 8, 2021
(Electronic) Receipt
Search/Exam
Mar 8, 2021
Amended claims with annotations
Search/Exam
Mar 8, 2021
Amended description with annotations
Search/Exam
Mar 8, 2021
Claims
Search/Exam
Mar 8, 2021
Description
Search/Exam
Mar 8, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 8, 2021
Jan 11, 2021
Annex to the communication
Search/Exam
Jan 11, 2021
Jan 11, 2021
Aug 8, 2019
(Electronic) Receipt
Search/Exam
Aug 8, 2019
Letter accompanying subsequently filed items
Search/Exam
Aug 8, 2019
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Apr 18, 2019
Annex to the communication
Search/Exam
Apr 18, 2019
Communication from the Examining Division
Search/Exam
Oct 24, 2018
Oct 10, 2018
(Electronic) Receipt
Search/Exam
Oct 10, 2018
Enquiry as to the processing of the file
Search/Exam
Oct 10, 2018
Letter accompanying subsequently filed items
Search/Exam
Oct 2, 2017
(Electronic) Receipt
Search/Exam
Oct 2, 2017
Letter accompanying subsequently filed items
Search/Exam
Oct 2, 2017
Oct 2, 2017
Aug 21, 2017
Aug 14, 2017
(Electronic) Receipt
Search/Exam
Aug 14, 2017
Letter accompanying subsequently filed items
Search/Exam
Aug 14, 2017
Apr 3, 2017
Annex to the communication
Search/Exam
Apr 3, 2017
Communication from the Examining Division
Search/Exam
Mar 24, 2017
Examination started
Search/Exam
Aug 25, 2016
Aug 18, 2016
(Electronic) Receipt
Search/Exam
Aug 18, 2016
Aug 18, 2016
Letter accompanying subsequently filed items
Search/Exam
May 18, 2016
May 12, 2016
Submission concerning representation
Search/Exam
May 12, 2016
Submission concerning representation
Search/Exam
Dec 29, 2014
Dec 29, 2014
Amended claims with annotations
Search/Exam
Dec 29, 2014
Dec 29, 2014
Amended description with annotations
Search/Exam
Dec 29, 2014
Amendments received before examination
Search/Exam
Dec 29, 2014
Letter accompanying subsequently filed items
Search/Exam
Jun 30, 2014
May 28, 2014
Notification of forthcoming publication
Search/Exam
Nov 20, 2013
Submission concerning representation
Search/Exam
Jun 21, 2013
Jun 21, 2013
European search opinion
Search/Exam
Jun 21, 2013
European search report
Search/Exam
May 2, 2013
Communication to designated inventor
Search/Exam
May 2, 2013
Communication to designated inventor
Search/Exam
May 2, 2013
Communication to designated inventor
Search/Exam
Apr 3, 2013
Designation of inventor
Search/Exam
Apr 3, 2013
Letter accompanying subsequently filed items
Search/Exam
Feb 7, 2013
Deficiency in designation of inventor
Search/Exam
Dec 20, 2012
Abstract
Search/Exam
Dec 20, 2012
Dec 20, 2012
Claims
Search/Exam
Dec 20, 2012
Description
Search/Exam
Dec 20, 2012
Request for grant of a European patent
Search/Exam