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The patent EP3615667 was granted to Regents OF The University OF California on Aug 11, 2021. The application was filed on Apr 27, 2018 under application number EP18728259A. 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 |
|---|---|---|---|
| J A KEMP | May 11, 2022 | J A KEMP | ADMISSIBLE |
| DR SCHUSSLER | May 9, 2022 | SCHUSSLER | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US20080335071 |
| DESCRIPTION | US2004038400 |
| DESCRIPTION | US2004131637 |
| DESCRIPTION | US2009203102 |
| DESCRIPTION | US2010003716 |
| DESCRIPTION | US2010048964 |
| DESCRIPTION | US2012144523 |
| DESCRIPTION | US5451513 |
| DESCRIPTION | US5545817 |
| DESCRIPTION | US5545818 |
| DESCRIPTION | US5576198 |
| DESCRIPTION | US6447784 |
| DESCRIPTION | US6900012 |
| DESCRIPTION | WO2004033646 |
| DESCRIPTION | WO2009076676 |
| DESCRIPTION | WO2009132220 |
| DESCRIPTION | WO2010003007 |
| DESCRIPTION | WO9516783 |
| DESCRIPTION | WO9617951 |
| EXAMINATION | WO2019014490 |
| EXAMINATION | WO2019071000 |
| INTERNATIONAL-SEARCH-REPORT | EP3067058 |
| INTERNATIONAL-SEARCH-REPORT | US2012144523 |
| INTERNATIONAL-SEARCH-REPORT | US2016010126 |
| OPPOSITION | EP3067058 |
| OPPOSITION | US2012144523 |
| OPPOSITION | US2013067619 |
| OPPOSITION | US2014141476 |
| OPPOSITION | US2016010126 |
| OPPOSITION | WO2016010827 |
| OPPOSITION | WO2017139496 |
| OPPOSITION | WO2019071000 |
| OTHER | WO2019071000 |
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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Dec 18, 2025
Dec 17, 2025
(Electronic) Receipt
Appeal
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(Electronic) Receipt
Appeal
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Appeal
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Reply to appeal
Appeal
Apr 4, 2024
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Mar 27, 2024
(Electronic) Receipt
Appeal
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Appeal
Jan 24, 2024
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Notice of appeal
Appeal
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Means of redress
OPPO
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Aug 24, 2021
Jul 15, 2021
Decision to grant a European patent
Search/Exam
Jun 30, 2021
(Electronic) Receipt
Search/Exam
Jun 30, 2021
Filing of the translations of the claims
Search/Exam
Jun 30, 2021
Letter accompanying subsequently filed items
Search/Exam
Jun 14, 2021
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Intention to grant (signatures)
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Jun 14, 2021
Text intended for grant (clean copy)
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Jun 14, 2021
Text intended for grant (sequence listing)
Search/Exam
Jun 14, 2021
Apr 21, 2021
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Observations by third parties
Search/Exam
Apr 15, 2021
Observations by third parties
Search/Exam
Mar 19, 2021
(Electronic) Receipt
Search/Exam
Mar 19, 2021
Letter accompanying subsequently filed items
Search/Exam
Mar 19, 2021
Mar 11, 2021
Annex to the communication
Search/Exam
Mar 11, 2021
Communication from the Examining Division
Search/Exam
Mar 10, 2021
Refund of fees
Search/Exam
Feb 26, 2021
(Electronic) Receipt
Search/Exam
Feb 26, 2021
Amended claims with annotations
Search/Exam
Feb 26, 2021
Amended description with annotations
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Feb 26, 2021
Claims
Search/Exam
Feb 26, 2021
Description
Search/Exam
Feb 26, 2021
Letter accompanying subsequently filed items
Search/Exam
Feb 26, 2021
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Observations by third parties
Search/Exam
Jan 7, 2021
(Electronic) Receipt
Search/Exam
Jan 7, 2021
Filing of the translations of the claims
Search/Exam
Jan 7, 2021
French translation of claims
Search/Exam
Jan 7, 2021
German translation of the claims
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Jan 7, 2021
Letter accompanying subsequently filed items
Search/Exam
Nov 2, 2020
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Intention to grant (signatures)
Search/Exam
Nov 2, 2020
Text intended for grant (clean copy)
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Nov 2, 2020
Text intended for grant (sequence listing)
Search/Exam
Nov 2, 2020
Oct 9, 2020
(Electronic) Receipt
Search/Exam
Oct 9, 2020
Amended description with annotations
Search/Exam
Oct 9, 2020
Description
Search/Exam
Oct 9, 2020
Letter accompanying subsequently filed items
Search/Exam
Oct 9, 2020
Sep 23, 2020
Annex to the communication
Search/Exam
Sep 23, 2020
Communication from the Examining Division
Search/Exam
Jul 30, 2020
(Electronic) Receipt
Search/Exam
Jul 30, 2020
Amended claims with annotations
Search/Exam
Jul 30, 2020
Claims
Search/Exam
Jul 30, 2020
Letter accompanying subsequently filed items
Search/Exam
Jul 30, 2020
May 25, 2020
Document concerning representation
Search/Exam
Apr 17, 2020
Annex to the communication
Search/Exam
Apr 17, 2020
Communication from the Examining Division
Search/Exam
Apr 7, 2020
Examination started
Search/Exam
Mar 4, 2020
Feb 20, 2020
(Electronic) Receipt
Search/Exam
Feb 20, 2020
Feb 20, 2020
Amended claims with annotations
Search/Exam
Feb 20, 2020
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Search/Exam
Feb 20, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 5, 2020
Dec 3, 2019
Communication to designated inventor
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Dec 3, 2019
Communication to designated inventor
Search/Exam
Dec 3, 2019
Communication to designated inventor
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Dec 3, 2019
Communication to designated inventor
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Dec 3, 2019
Communication to designated inventor
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Dec 3, 2019
Communication to designated inventor
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Dec 3, 2019
Communication to designated inventor
Search/Exam
Nov 26, 2019
(Electronic) Receipt
Search/Exam
Nov 26, 2019
Nov 26, 2019
Amended claims with annotations
Search/Exam
Nov 26, 2019
Nov 26, 2019
Amended description with annotations
Search/Exam
Nov 26, 2019
Converted Sequence Listing
Search/Exam
Nov 26, 2019
Request for entry into the European phase
Search/Exam
Nov 11, 2019
Sep 6, 2019
Information on entry into European phase
Search/Exam
Dec 11, 2018
Dec 11, 2018
Notification of the recording of a change
Search/Exam
Nov 28, 2018
Annex
PCTISA
Nov 28, 2018
Nov 20, 2018
Nov 20, 2018
Nov 1, 2018
Converted Sequence Listing
Search/Exam
Nov 1, 2018
Copy of the international search report
Search/Exam
Nov 1, 2018
Published international application - A1
Search/Exam
Sep 26, 2018
Sep 14, 2018
Sep 14, 2018
Sep 14, 2018
Aug 1, 2018
ISR: cited documents
PCTISA
Jul 25, 2018
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Jul 25, 2018
Jul 9, 2018
Abstract
PCTISA
Jul 9, 2018
Annex
PCTISA
Jul 9, 2018
Annex
PCTISA
Jul 9, 2018
Annex
PCTISA
Jul 9, 2018
Annex
PCTISA
Jul 9, 2018
Annex
PCTISA
Jul 9, 2018
Annex
PCTISA
Jul 9, 2018
Annex
PCTISA
Jul 9, 2018
Jul 9, 2018
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Jun 15, 2018
Jun 15, 2018
May 14, 2018
Abstract
PCTISA
May 14, 2018
Annex
PCTISA
May 14, 2018
Claims
PCTISA
May 14, 2018
May 14, 2018
Description
PCTISA
May 14, 2018
Drawings
PCTISA
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