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The patent EP2877854 was granted to The Trustees OF Columbia University IN The City OF NEW York on Jun 4, 2025. The application was filed on Jul 24, 2013 under application number EP13823252A. 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 |
|---|---|---|---|
| BOULT WADE TENNANT | Jun 7, 2023 | BOULT WADE TENNANT | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| INTERNATIONAL-SEARCH-REPORT | US2006275794 |
| INTERNATIONAL-SEARCH-REPORT | US2007039076 |
| INTERNATIONAL-SEARCH-REPORT | US2011053787 |
| INTERNATIONAL-SEARCH-REPORT | US2011105337 |
| INTERNATIONAL-SEARCH-REPORT | US2011195848 |
| INTERNATIONAL-SEARCH-REPORT | US2011287974 |
| INTERNATIONAL-SEARCH-REPORT | US6844168 |
| INTERNATIONAL-SEARCH-REPORT | WO2008070179 |
| INTERNATIONAL-SEARCH-REPORT | WO9935159 |
| OPPOSITION | EP2824181 |
| OPPOSITION | WO2013133351 |
| OPPOSITION | WO2014018673 |
| OTHER | WO2013133351 |
| SEARCH | WO2013129369 |
| SEARCH | WO2013133351 |
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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May 9, 2025
May 9, 2025
May 8, 2025
Refund of fees
Search/Exam
Apr 29, 2025
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Mar 14, 2025
Refund of fees
Appeal
Mar 13, 2025
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(Electronic) Receipt
Appeal
Mar 5, 2025
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Withdrawal of an appeal
Appeal
Jan 10, 2025
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Jan 7, 2025
(Electronic) Receipt
Appeal
Jan 7, 2025
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Notice of appeal
Appeal
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Decision to grant a European patent
Search/Exam
Jul 20, 2022
Refund of fees
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Jul 5, 2022
(Electronic) Receipt
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Jul 5, 2022
Filing of the translations of the claims
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Jul 5, 2022
French translation of claims
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Jul 5, 2022
German translation of the claims
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Jul 5, 2022
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Mar 9, 2022
Text intended for grant (clean copy)
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Jul 15, 2021
(Electronic) Receipt
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Jul 15, 2021
Amended claims with annotations
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Jul 15, 2021
Claims
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Jul 15, 2021
Letter accompanying subsequently filed items
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Jul 15, 2021
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Annex to the communication
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Mar 15, 2021
Communication from the Examining Division
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Jan 22, 2021
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Observations by third parties
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Dec 8, 2020
(Electronic) Receipt
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Dec 8, 2020
Filing of the translations of the claims
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Dec 8, 2020
Letter accompanying subsequently filed items
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Dec 8, 2020
Translation of the claims
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Dec 8, 2020
Translation of the claims
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Intention to grant (signatures)
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Aug 12, 2020
Text intended for grant (clean copy)
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Aug 12, 2020
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Citation filed by a third party
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Aug 11, 2020
Citation filed by a third party
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Aug 11, 2020
Citation filed by a third party
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Aug 11, 2020
Observations by third parties
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Jul 16, 2020
(Electronic) Receipt
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Jul 16, 2020
Amended claims with annotations
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Jul 16, 2020
Claims
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Jul 16, 2020
Letter accompanying subsequently filed items
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Annex to the communication
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May 12, 2020
Communication from the Examining Division
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May 4, 2020
Annex to the communication
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May 4, 2020
Consultation by telephone/in person
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May 4, 2020
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(Electronic) Receipt
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Mar 20, 2020
Amended claims with annotations
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Mar 20, 2020
Claims
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Mar 20, 2020
Description
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Mar 20, 2020
Letter accompanying subsequently filed items
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Mar 20, 2020
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Annex to the communication
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Dec 6, 2019
Communication from the Examining Division
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Aug 23, 2019
(Electronic) Receipt
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Aug 23, 2019
Amended claims with annotations
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Aug 23, 2019
Claims
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Aug 23, 2019
Letter accompanying subsequently filed items
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Aug 23, 2019
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Annex to the communication
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Apr 25, 2019
Communication from the Examining Division
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Mar 13, 2019
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(Electronic) Receipt
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Mar 1, 2019
Letter accompanying subsequently filed items
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Mar 1, 2019
Feb 28, 2019
(Electronic) Receipt
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Feb 28, 2019
Oct 26, 2018
Oct 19, 2018
Non-patent literature filed by a third party
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Oct 19, 2018
Observations by third parties
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Jul 27, 2018
(Electronic) Receipt
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Jul 27, 2018
Amended description with annotations
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Jul 27, 2018
Description
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Jul 27, 2018
Letter accompanying subsequently filed items
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Jul 27, 2018
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(Electronic) Receipt
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Apr 9, 2018
Amended claims with annotations
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Apr 9, 2018
Claims
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Apr 9, 2018
Letter accompanying subsequently filed items
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Apr 9, 2018
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Nov 30, 2017
Annex to a communication
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Nov 30, 2017
Annex to the communication
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Nov 30, 2017
Communication from the Examining Division
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(Electronic) Receipt
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(Electronic) Receipt
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Jan 5, 2017
Amended description with annotations
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Amended description with annotations
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Jan 5, 2017
Description
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Jan 5, 2017
Description
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Jan 5, 2017
Letter accompanying subsequently filed items
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Jan 5, 2017
Letter accompanying subsequently filed items
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Jan 5, 2017
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Dec 5, 2016
Annex to the communication
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Dec 5, 2016
Nov 29, 2016
Examination started
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Sep 14, 2016
Aug 2, 2016
(Electronic) Receipt
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Aug 2, 2016
Aug 2, 2016
Amended claims with annotations
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Aug 2, 2016
Amendments received before examination
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Aug 2, 2016
Letter accompanying subsequently filed items
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Feb 1, 2016
Jan 29, 2016
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European search opinion
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Jan 13, 2016
Information on Search Strategy
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Jan 13, 2016
Supplementary European search report
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Dec 18, 2015
(Electronic) Receipt
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Dec 18, 2015
Letter accompanying subsequently filed items
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Dec 18, 2015
Letter concerning the inventor
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Dec 17, 2015
Search started
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Jun 3, 2015
(Electronic) Receipt
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Jun 3, 2015
Jun 3, 2015
Amended claims with annotations
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Jun 3, 2015
Amendments received before examination
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Jun 3, 2015
Letter accompanying subsequently filed items
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May 7, 2015
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Communication to designated inventor
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Mar 4, 2015
Communication to designated inventor
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Mar 4, 2015
Communication to designated inventor
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Feb 19, 2015
(Electronic) Receipt
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Feb 19, 2015
Feb 19, 2015
Converted Sequence Listing
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Feb 19, 2015
Request for entry into the European phase
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Feb 10, 2015
Dec 5, 2014
Information on entry into European phase
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Apr 17, 2014
Copy of the international search report
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Apr 17, 2014
Feb 18, 2014
Jan 30, 2014
Published international application - A2
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