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The patent EP1776328 was granted to DOW Technology Investments on Mar 26, 2025. The application was filed on Jul 19, 2005 under application number EP05778978A. 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 |
|---|---|---|---|
| EVONIK OPERATIONS | Jan 18, 2019 | EISENFUHR SPEISER | ADMISSIBLE |
| OQ CHEMICALS | Jan 17, 2019 | MICHALSKI HUTTERMANN & PARTNER PATENTANWALTE MBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | EP0589463 |
| OPPOSITION | EP0589463 |
| OPPOSITION | JP2000143572 |
| OPPOSITION | US4148830 |
| OPPOSITION | US4528404 |
| OPPOSITION | US4668651 |
| OPPOSITION | US4723036 |
| OPPOSITION | US4774361 |
| OPPOSITION | US4808756 |
| OPPOSITION | US4960949 |
| OPPOSITION | US5288918 |
| OPPOSITION | US5763679 |
| OPPOSITION | US5773666 |
| OPPOSITION | WO9720801 |
| OPPOSITION | WO9740000 |
| OTHER | EP0589463 |
| OTHER | WO9720801 |
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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Feb 27, 2025
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Refund of fees
Search/Exam
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(Electronic) Receipt
Appeal
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Withdrawal of an appeal
Appeal
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Appeal
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Appeal
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Appeal
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OPPO
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OPPO
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OPPO
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OPPO
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OPPO
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OPPO
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Submission concerning representation
Search/Exam
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Submission concerning representation
Search/Exam
Apr 30, 2018
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Decision to grant a European patent
Search/Exam
Mar 9, 2018
(Electronic) Receipt
Search/Exam
Mar 9, 2018
Filing of the translations of the claims
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French translation of claims
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German translation of the claims
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Letter accompanying subsequently filed items
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Nov 15, 2017
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(Electronic) Receipt
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Oct 17, 2017
Amended claims with annotations
Search/Exam
Oct 17, 2017
Claims
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Oct 17, 2017
Letter accompanying subsequently filed items
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Oct 17, 2017
Jun 8, 2017
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Intention to grant (signatures)
Search/Exam
Jun 8, 2017
Text intended for grant (clean copy)
Search/Exam
Jun 8, 2017
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(Electronic) Receipt
Search/Exam
Feb 15, 2017
Amended claims with annotations
Search/Exam
Feb 15, 2017
Claims
Search/Exam
Feb 15, 2017
Letter accompanying subsequently filed items
Search/Exam
Feb 15, 2017
Oct 6, 2016
Annex to the communication
Search/Exam
Oct 6, 2016
Communication from the Examining Division
Search/Exam
Jul 5, 2016
(Electronic) Receipt
Search/Exam
Jul 5, 2016
Letter accompanying subsequently filed items
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Jul 5, 2016
Feb 26, 2016
Annex to the communication
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Feb 26, 2016
Communication from the Examining Division
Search/Exam
Feb 9, 2016
(Electronic) Receipt
Search/Exam
Feb 9, 2016
Letter accompanying subsequently filed items
Search/Exam
Feb 9, 2016
Nov 26, 2015
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(Electronic) Receipt
Search/Exam
Nov 23, 2015
Letter accompanying subsequently filed items
Search/Exam
Nov 23, 2015
Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Non-patent literature filed by a third party
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Nov 23, 2015
Observations by third parties
Search/Exam
Nov 23, 2015
Patent document filed by a Third party
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Nov 23, 2015
Patent document filed by a Third party
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Oct 12, 2015
Annex to the communication
Search/Exam
Oct 12, 2015
Communication from the Examining Division
Search/Exam
Apr 16, 2015
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(Electronic) Receipt
Search/Exam
Apr 13, 2015
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Letter accompanying subsequently filed items
Search/Exam
Dec 5, 2013
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Claims
Search/Exam
Dec 21, 2010
Dec 17, 2010
Claims
Search/Exam
Dec 17, 2010
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Annex to the communication
Search/Exam
Aug 17, 2010
Communication from the Examining Division
Search/Exam
Jun 10, 2008
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Submission concerning representation
Search/Exam
Jan 26, 2007
Submission concerning representation
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Jan 24, 2007
Request for entry into the European phase
Search/Exam
Jan 22, 2007
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Amendments received before examination
Search/Exam
Jan 22, 2007
Claims
Search/Exam
Jan 22, 2007
Letter accompanying subsequently filed items
Search/Exam
Jan 22, 2007
Request for entry into the European phase
Search/Exam
Dec 29, 2006
Information on entry into European phase
Search/Exam
Nov 17, 2006
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PCT demand form
PCT2
Jul 18, 2006
PCT demand form
PCT2
Jul 18, 2006
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May 26, 2006
May 19, 2006
Notification of the recording of a change
Search/Exam
May 17, 2006
May 15, 2006
Apr 26, 2006
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PCT demand form
PCT2
Apr 7, 2006
Apr 7, 2006
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PCT demand form
PCT2
Mar 15, 2006
Feb 23, 2006
Copy of the international search report
Search/Exam
Feb 23, 2006
Published international application - A1
Search/Exam
Sep 26, 2005
Abstract
PCTISA
Sep 26, 2005
Claims
PCTISA
Sep 26, 2005
Description
PCTISA
Sep 26, 2005
Drawings
PCTISA
Sep 26, 2005