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The patent EP3599877 was granted to CHR Hansen on Jul 6, 2022. The application was originally filed on Mar 21, 2018 under application number EP18711573A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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 |
|---|---|---|---|
| DSM ASSETS | Apr 6, 2023 | J A KEMP | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | WO2005003327 |
| DESCRIPTION | WO2011000879 |
| DESCRIPTION | WO2011026863 |
| DESCRIPTION | WO2011092300 |
| DESCRIPTION | WO2013160413 |
| DESCRIPTION | WO2015193449 |
| DESCRIPTION | WO2015193459 |
| INTERNATIONAL-SEARCH-REPORT | US2005196388 |
| INTERNATIONAL-SEARCH-REPORT | US2015086675 |
| INTERNATIONAL-SEARCH-REPORT | WO2015193449 |
| INTERNATIONAL-SEARCH-REPORT | WO2015193459 |
| OPPOSITION | EP2957180 |
| OPPOSITION | EP3821712 |
| OPPOSITION | US2005196388 |
| OPPOSITION | US2009238921 |
| OPPOSITION | US5071763 |
| OPPOSITION | US5382438 |
| OPPOSITION | WO2013160413 |
| OPPOSITION | WO2015193449 |
| OPPOSITION | WO2015193459 |
| OPPOSITION | WO2017103051 |
| OPPOSITION | WO2017167660 |
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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Nov 5, 2025
Refund of fees
Appeal
Nov 3, 2025
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Oct 28, 2025
(Electronic) Receipt
Appeal
Oct 28, 2025
Oct 28, 2025
Withdrawal of an appeal
Appeal
Sep 19, 2025
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(Electronic) Receipt
Appeal
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Appeal
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Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
May 31, 2022
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(Electronic) Receipt
Search/Exam
May 30, 2022
Filing of the translations of the claims
Search/Exam
May 30, 2022
French translation of claims
Search/Exam
May 30, 2022
German translation of the claims
Search/Exam
May 30, 2022
Letter accompanying subsequently filed items
Search/Exam
May 25, 2022
(Electronic) Receipt
Search/Exam
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Letter accompanying subsequently filed items
Search/Exam
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Intention to grant (signatures)
Search/Exam
Apr 20, 2022
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Apr 20, 2022
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Apr 20, 2022
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Annex to the communication
Search/Exam
Mar 24, 2022
Consultation by telephone/in person
Search/Exam
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(Electronic) Receipt
Search/Exam
Mar 17, 2022
Description
Search/Exam
Mar 17, 2022
Letter accompanying subsequently filed items
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Mar 17, 2022
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(Electronic) Receipt
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Feb 17, 2022
Amended claims with annotations
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Feb 17, 2022
Claims
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Feb 17, 2022
Description
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Aug 24, 2021
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Aug 24, 2021
Letter accompanying subsequently filed items
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Aug 13, 2021
Acknowledgement of a document
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Aug 13, 2021
Annex to the communication
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Aug 13, 2021
Summons to attend oral proceedings
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Jul 20, 2021
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Jul 20, 2021
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Intention to grant (signatures)
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Mar 31, 2021
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Mar 31, 2021
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Feb 24, 2021
Consultation by telephone/in person
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Feb 24, 2021
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Examination started
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May 15, 2020
(Electronic) Receipt
Search/Exam
May 15, 2020
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Amended claims with annotations
Search/Exam
May 15, 2020
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May 15, 2020
Letter accompanying subsequently filed items
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Jan 9, 2020
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Letter which had not been notified
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Nov 7, 2019
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Communication to designated inventor
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Nov 5, 2019
Communication to designated inventor
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Oct 30, 2019
Priority search results copy provided by EPO
Search/Exam
Oct 14, 2019
(Electronic) Receipt
Search/Exam
Oct 14, 2019
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Request for entry into the European phase
Search/Exam
Aug 9, 2019
Information on entry into European phase
Search/Exam
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Converted Sequence Listing
Search/Exam
Oct 4, 2018
Copy of the international search report
Search/Exam
Oct 4, 2018
Published international application - A1
Search/Exam
Jun 4, 2018
May 9, 2018
ISR: cited documents
PCTISA
May 7, 2018
(Electronic) Receipt
PCTRO
May 7, 2018
May 7, 2018
RO101 Declaration
PCTRO
May 7, 2018
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(Electronic) Receipt
PCTRO
Apr 20, 2018
Apr 20, 2018
RO101 Declaration
PCTRO
Apr 4, 2018
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Mar 27, 2018
Mar 21, 2018
(Electronic) Receipt
PCTRO
Mar 21, 2018
Abstract
PCTRO
Mar 21, 2018
Claims
PCTRO
Mar 21, 2018
Description
PCTRO
Mar 21, 2018
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Drawings
PCTRO
Mar 21, 2018
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