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The patent EP1291368 was granted to Sumitomo Seika Chemicals on May 31, 2017. The application was filed on Apr 12, 2002 under application number EP02718574A. 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 |
|---|---|---|---|
| NIPPON SHOKUBAI | Feb 28, 2018 | HOFFMANN EITLE | - |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | JPH04501877 |
| INTERNATIONAL-SEARCH-REPORT | JPH1160975 |
| INTERNATIONAL-SEARCH-REPORT | JPS56131608 |
| INTERNATIONAL-SEARCH-REPORT | WO9703114 |
| OPPOSITION | EP0083022 |
| OPPOSITION | EP0450922 |
| OPPOSITION | EP0719794 |
| OPPOSITION | EP0744435 |
| OPPOSITION | EP0759460 |
| OPPOSITION | EP0812873 |
| OPPOSITION | EP0841303 |
| OPPOSITION | EP0872491 |
| OPPOSITION | EP0885917 |
| OPPOSITION | EP0937739 |
| OPPOSITION | EP1153656 |
| OPPOSITION | JP2004002499 |
| OPPOSITION | JPH06313042 |
| OPPOSITION | JPH06313043 |
| OPPOSITION | JPH06313044 |
| OPPOSITION | JPH09124879 |
| OPPOSITION | JPH09127732 |
| OPPOSITION | JPS56147630 |
| OPPOSITION | JPS5744627 |
| OPPOSITION | JPS6122693Y |
| OPPOSITION | US4587308 |
| OPPOSITION | US5122544 |
| OPPOSITION | US5462972 |
| OPPOSITION | US5712316 |
| OPPOSITION | US5744564 |
| OPPOSITION | US5976696 |
| OPPOSITION | WO9115368 |
| OPPOSITION | WO9522357 |
| OPPOSITION | WO9743331 |
| OPPOSITION | WO9903577 |
| OTHER | US5744564 |
| OTHER | US5856370 |
| OTHER | US6284362 |
| OTHER | WO9522357 |
| SEARCH | EP0317106 |
| SEARCH | EP0450924 |
| SEARCH | EP0872491 |
| SEARCH | US5268224 |
| SEARCH | US5744564 |
| SEARCH | US6284362 |
| SEARCH | WO9522357 |
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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Claims
OPPO
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OPPO
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OPPO
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OPPO
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May 31, 2017
May 8, 2017
Decision to grant a European patent
Search/Exam
Apr 18, 2017
Apr 18, 2017
Apr 18, 2017
Intention to grant (signatures)
Search/Exam
Apr 18, 2017
Text intended for grant (clean copy)
Search/Exam
Apr 18, 2017
Apr 6, 2017
Mar 23, 2017
(Electronic) Receipt
Search/Exam
Mar 23, 2017
Amended claims with annotations
Search/Exam
Mar 23, 2017
Amended description with annotations
Search/Exam
Mar 23, 2017
Claims
Search/Exam
Mar 23, 2017
Description
Search/Exam
Mar 23, 2017
French translation of claims
Search/Exam
Mar 23, 2017
German translation of the claims
Search/Exam
Mar 23, 2017
Letter accompanying subsequently filed items
Search/Exam
Mar 23, 2017
Nov 24, 2016
Nov 24, 2016
Nov 24, 2016
Intention to grant (signatures)
Search/Exam
Nov 24, 2016
Text intended for grant (clean copy)
Search/Exam
Nov 24, 2016
Jul 7, 2015
(Electronic) Receipt
Search/Exam
Jul 7, 2015
Amended claims with annotations
Search/Exam
Jul 7, 2015
Amended description with annotations
Search/Exam
Jul 7, 2015
Claims
Search/Exam
Jul 7, 2015
Description
Search/Exam
Jul 7, 2015
Letter accompanying subsequently filed items
Search/Exam
Jul 7, 2015
Mar 6, 2015
Annex to the communication
Search/Exam
Mar 6, 2015
Communication from the Examining Division
Search/Exam
Dec 5, 2013
Nov 8, 2013
Nov 6, 2013
Feb 14, 2013
(Electronic) Receipt
Search/Exam
Feb 14, 2013
Amended claims with annotations
Search/Exam
Feb 14, 2013
Annex
Search/Exam
Feb 14, 2013
Claims
Search/Exam
Feb 14, 2013
Letter accompanying subsequently filed items
Search/Exam
Feb 14, 2013
Dec 14, 2012
Dec 10, 2012
(Electronic) Receipt
Search/Exam
Dec 10, 2012
Letter accompanying subsequently filed items
Search/Exam
Dec 10, 2012
Aug 9, 2012
Annex to the communication
Search/Exam
Aug 9, 2012
Communication from the Examining Division
Search/Exam
Jan 21, 2010
Amended claims with annotations
Search/Exam
Jan 21, 2010
Claims
Search/Exam
Jan 21, 2010
Jan 20, 2010
Nov 19, 2009
Nov 5, 2009
Jul 10, 2009
Annex to the communication
Search/Exam
Jul 10, 2009
Communication from the Examining Division
Search/Exam
May 22, 2009
Maintenance of the application
Search/Exam
Apr 9, 2009
Mar 23, 2009
Mar 23, 2009
Supplementary European search report
Search/Exam
Feb 12, 2007
Feb 12, 2007
Jan 24, 2007
Non-patent literature filed by a third party
Search/Exam
Jan 24, 2007
Observations by third parties
Search/Exam
Jan 24, 2007
Patent document filed by a Third party
Search/Exam
Jan 24, 2007
Patent document filed by a Third party
Search/Exam
Jan 24, 2007
Patent document filed by a Third party
Search/Exam
Jun 7, 2004
Feb 4, 2004
Jan 28, 2004
Request for change of representative
Search/Exam
Jan 27, 2004
Request for change of representative
Search/Exam
Nov 21, 2003
Communication to designated inventor
Search/Exam
Nov 21, 2003
Communication to designated inventor
Search/Exam
Nov 21, 2003
Communication to designated inventor
Search/Exam
Nov 21, 2003
Communication to designated inventor
Search/Exam
Nov 21, 2003
Communication to designated inventor
Search/Exam
May 5, 2003
Letter concerning the inventor
Search/Exam
Jan 29, 2003
Notification of forthcoming publication
Search/Exam
Jan 20, 2003
Jan 2, 2003
Dec 17, 2002
Abstract
Search/Exam
Dec 17, 2002
Claims
Search/Exam
Dec 17, 2002
Claims
Search/Exam
Dec 17, 2002
Claims
Search/Exam
Dec 17, 2002
Description
Search/Exam
Dec 17, 2002
Drawings
Search/Exam
Dec 17, 2002
Letter concerning search matters
Search/Exam
Dec 17, 2002
Request for entry into the European phase
Search/Exam
Dec 17, 2002
Translation of priority document
Search/Exam
Oct 31, 2002
Copy of the international search report
Search/Exam
Oct 31, 2002
Published international application - A1
Search/Exam