The patent EP3638375 was granted to Unilever on Jun 22, 2022. The application was originally filed on Jun 7, 2018 under application number EP18730718A. 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.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
NPL citations refer to non-patent references such as research papers, articles, or other publications cited during examination or opposition phases.
| Citation Phase | Reference Text | Link |
|---|---|---|
| OPPOSITION | - Anonymous, "Arginin", Wikipedia, (20170710), Wikipedia, URL: https://de.wikipedia.org/w/index.php?title=Arginin&oldid=167139062, XP093235503 | - |
| OPPOSITION | - Anonymous, "Cystein", Wikipedia, (20240912), pages 1 - 11, Wikipedia, URL: https://de.wikipedia.org/wiki/Cystein, XP093271029 | - |
| OPPOSITION | - Anonymous, "Essigsäure", Wikipedia, (20250119), pages 1 - 18, Wikipedia, URL: https://de.wikipedia.org/wiki/Essigsäure, XP093271059 | - |
| OPPOSITION | - Anonymous, "Fumaric acid", Wikipedia, (20250130), pages 1 - 5, Wikipedia, URL: https://en.wikipedia.org/wiki/Fumaric_acid, XP093271065 | - |
| OPPOSITION | - Anonymous, "Glutaminsäure", Wikipedia, (20241230), pages 1 - 9, Wikipedia, URL: https://de.wikipedia.org/wiki/Glutamins%C3%A4ure, XP093271033 | - |
| OPPOSITION | - Anonymous, "Glutamin", Wikipedia, (20250410), pages 1 - 9, Wikipedia, URL: https://de.wikipedia.org/wiki/Glutamin, XP093271032 | - |
| OPPOSITION | - Anonymous, "Isoleucin", Wikipedia, (20240623), pages 1 - 5, Wikipedia, URL: https://de.wikipedia.org/wiki/Isoleucin, XP093271036 | - |
| OPPOSITION | - Anonymous, "Leucin", Wikipedia, (20250328), pages 1 - 7, Wikipedia, URL: https://de.wikipedia.org/wiki/Leucin, XP093271040 | - |
| OPPOSITION | - Anonymous, "Methionin", Wikipedia, (20250308), pages 1 - 11, Wikipedia, URL: https://de.wikipedia.org/wiki/Methionin, XP093271045 | - |
| OPPOSITION | - Anonymous, "Milchsäure", Wikipedia, (20241217), pages 1 - 6, Wikipedia, URL: https://de.wikipedia.org/wiki/Milchsäure, XP093271055 | - |
| OPPOSITION | - Anonymous, "Serin", Wikipedia, (20250318), pages 1 - 7, Wikipedia, URL: https://de.wikipedia.org/wiki/Serin, XP093271049 | - |
| OPPOSITION | - Anonymous, "Valin", Wikipedia, (20230603), pages 1 - 8, Wikipedia, URL: https://de.wikipedia.org/wiki/Valin, XP093271050 | - |
| OPPOSITION | - Anonymous, "Weinsäure", Wikipedia, (20250402), pages 1 - 3, Wikipedia, URL: https://de.wikipedia.org/wiki/Weinsäure, XP093271061 | - |
| OPPOSITION | - Bella Química, "Intensive Ortho Rebuilding Mask", Mintel, (20161101), Database accession no. 4418345, XP093270999 | - |
| OPPOSITION | - Originitalia, "300 Trecento Revitalising Hair Treatment", Mintel, (20140301), Database accession no. 2329751, XP093270996 | - |
| OPPOSITION | - Schueller Randy, Perry Romanowski, "HISTORICAL DEVELOPMENT OF THE CATIONIC SURFACTANT INDUSTRY", Conditioning Agents for Hair and Skin, MARCEL DEKKER, INC, (19990101), page 226-229, 238-243, XP093271005 | - |
Get a free citation report including examiner, opposition, and international search citations.
Get Citation ReportThe 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
Get instant alerts for new documents
Aug 26, 2025
Aug 6, 2025
Aug 6, 2025
Aug 6, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Means of redress
OPPO
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Aug 1, 2025
Jun 25, 2025
Jun 24, 2025
Jun 20, 2025
Jun 19, 2025
Jun 19, 2025
Apr 23, 2025
Apr 23, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Apr 15, 2025
Dec 17, 2024
Dec 17, 2024
Dec 17, 2024
Dec 17, 2024
Dec 17, 2024
Sep 10, 2024
Jul 16, 2024
Jul 16, 2024
Jul 16, 2024
Jul 10, 2024
Jul 10, 2024
Jul 10, 2024
Aug 10, 2023
Aug 3, 2023
Aug 3, 2023
Aug 3, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
Jul 27, 2023
May 25, 2023
Apr 3, 2023
Apr 3, 2023
Mar 24, 2023
Mar 21, 2023
Mar 21, 2023
Mar 21, 2023
Mar 21, 2023
Mar 21, 2023
Mar 21, 2023
Mar 21, 2023
Mar 21, 2023
Jan 9, 2023
Document concerning representation
Search/Exam
Jan 9, 2023
General authorisation
Search/Exam
Jan 9, 2023
Letter accompanying subsequently filed items
Search/Exam
Jul 5, 2022
May 27, 2022
Decision to grant a European patent
Search/Exam
May 13, 2022
(Electronic) Receipt
Search/Exam
May 13, 2022
French translation of claims
Search/Exam
May 13, 2022
German translation of the claims
Search/Exam
May 13, 2022
Letter accompanying subsequently filed items
Search/Exam
Mar 28, 2022
Mar 28, 2022
Mar 28, 2022
Intention to grant (signatures)
Search/Exam
Mar 28, 2022
Text intended for grant (clean copy)
Search/Exam
Mar 28, 2022
Mar 24, 2022
Mar 18, 2022
Mar 17, 2022
Jan 24, 2022
Oct 13, 2021
Oct 13, 2021
Oct 13, 2021
Text intended for grant (clean copy)
Search/Exam
Oct 13, 2021
Aug 30, 2021
Aug 5, 2021
Letter accompanying subsequently filed items
Search/Exam
Aug 5, 2021
Letter to the Legal Division
Search/Exam
Jun 29, 2021
Communication from the Legal Division
Search/Exam
Jun 1, 2021
Annex
Search/Exam
Jun 1, 2021
Annex
Search/Exam
Jun 1, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 1, 2021
Letter to the Legal Division
Search/Exam
May 31, 2021
Annex
Search/Exam
May 31, 2021
Cover sheet for fax transmission
Search/Exam
May 28, 2021
Annex
Search/Exam
May 28, 2021
Cover sheet for fax transmission
Search/Exam
May 28, 2021
Letter to the Legal Division
Search/Exam
Mar 31, 2021
Communication from the Legal Division
Search/Exam
Mar 26, 2021
(Electronic) Receipt
Search/Exam
Mar 26, 2021
Amended claims with annotations
Search/Exam
Mar 26, 2021
Claims
Search/Exam
Mar 26, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 26, 2021
Mar 24, 2021
Annexes in respect of a client data request
Search/Exam
Mar 24, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 24, 2021
Mar 23, 2021
Annexes in respect of a client data request
Search/Exam
Mar 23, 2021
Annexes in respect of a client data request
Search/Exam
Mar 23, 2021
Annexes in respect of a client data request
Search/Exam
Mar 23, 2021
Annexes in respect of a client data request
Search/Exam
Mar 23, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 23, 2021
Mar 16, 2021
Annexes in respect of a client data request
Search/Exam
Mar 16, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 16, 2021
Mar 12, 2021
Communication from the Legal Division
Search/Exam
Mar 10, 2021
Mar 10, 2021
Mar 5, 2021
Annexes in respect of a client data request
Search/Exam
Mar 5, 2021
Annexes in respect of a client data request
Search/Exam
Mar 5, 2021
Annexes in respect of a client data request
Search/Exam
Mar 5, 2021
Annexes in respect of a client data request
Search/Exam
Mar 5, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 5, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 5, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 5, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Mar 5, 2021
Feb 1, 2021
Annexes in respect of a client data request
Search/Exam
Feb 1, 2021
Annexes in respect of a client data request
Search/Exam
Feb 1, 2021
Annexes in respect of a client data request
Search/Exam
Feb 1, 2021
Annexes in respect of a client data request
Search/Exam
Feb 1, 2021
Annexes in respect of a client data request
Search/Exam
Feb 1, 2021
Annexes in respect of a client data request
Search/Exam
Feb 1, 2021
Annexes in respect of a client data request
Search/Exam
Feb 1, 2021
Letter accompanying subsequently filed items
Search/Exam
Feb 1, 2021
Nov 19, 2020
Annex to the communication
Search/Exam
Nov 19, 2020
Communication from the Examining Division
Search/Exam
Nov 13, 2020
Examination started
Search/Exam
Oct 1, 2020
Document concerning representation
Search/Exam
Aug 7, 2020
(Electronic) Receipt
Search/Exam
Aug 7, 2020
Letter accompanying subsequently filed items
Search/Exam
Aug 7, 2020
Reply to Written Opinion prepared by the EPO
Search/Exam
Mar 25, 2020
Mar 6, 2020
Communication to designated inventor
Search/Exam
Mar 2, 2020
(Electronic) Receipt
Search/Exam
Mar 2, 2020
Mar 2, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 25, 2020
Letter which had not been notified
Search/Exam
Jan 28, 2020
Jan 21, 2020
Priority search results copy provided by EPO
Search/Exam
Jan 20, 2020
Communication to designated inventor
Search/Exam
Jan 20, 2020
Communication to designated inventor
Search/Exam
Jan 20, 2020
Communication to designated inventor
Search/Exam
Jan 20, 2020
Communication to designated inventor
Search/Exam
Jan 20, 2020
Communication to designated inventor
Search/Exam
Jan 3, 2020
Nov 21, 2019
(Electronic) Receipt
Search/Exam
Nov 21, 2019
Request for entry into the European phase
Search/Exam
Oct 25, 2019
Information on entry into European phase
Search/Exam
Jan 11, 2019
Dec 20, 2018
Copy of the international search report
Search/Exam
Dec 20, 2018
Published international application - A1
Search/Exam
Sep 11, 2018
Jul 27, 2018
ISR: cited documents
PCTISA
Jul 26, 2018
Jul 26, 2018
Jul 26, 2018
Jun 28, 2018
Jun 27, 2018
Jun 23, 2018
Jun 7, 2018
(Electronic) Receipt
PCTRO
Jun 7, 2018
Abstract
PCTRO
Jun 7, 2018
Claims
PCTRO
Jun 7, 2018
Description
PCTRO
Jun 7, 2018
Jun 7, 2018
Jun 7, 2018
Jun 7, 2018