The patent EP3449450 was granted to Nchain on Jun 15, 2022. The application was originally filed on Apr 28, 2017 under application number EP17721471A. The patent is currently recorded with a legal status of "Revoked".

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.
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 |
|---|---|---|
| INTERNATIONAL-SEARCH-REPORT | - Andreas M. Antonopoulos, "Mastering Bitcoin - Unlocking Digital Cryptocurrencies", Mastering bitcoin : [unlocking digital cryptocurrencies], Beijing Cambridge Farnham Köln Sebastopol Tokyo, O'Reilly Media, (20141220), ISBN 978-1-4493-7404-4, XP055306939 [X] 1-8,17,18,24,26,27 * Sections "Script Construction (Lock + Unlock)" and "Pay-to-Script Hash (P2SH) and Multi-Sig Addresses" and Section "Bitcoin Transactions" and "Appendix A: Transaction Script Language Operators, Constants, and Symbols" * [I] 9-16,19-23,25 | - |
| INTERNATIONAL-SEARCH-REPORT | - Anonymous, "Multisignature - Bitcoin Wiki", (20160105), URL: https://en.bitcoin.it/w/index.php?title=Multisignature&oldid=59815, (20170403), XP055361302 [I] 1,17,18,24,26 * Section "Multisignature Transactions" * | - |
| INTERNATIONAL-SEARCH-REPORT | - Anonymous, "Smart contract - Wikipedia, the free encyclopedia", (20150724), URL: https://en.wikipedia.org/w/index.php?title=Smart_contract&oldid=672866135, (20160118), XP055242294 [I] 1-27 * Sections "History" and "Replicated titles and contract execution" * | - |
| INTERNATIONAL-SEARCH-REPORT | - Ian Allison, "Ethereum-based Slock.it reveals first ever lock opened with money", http://www.ibtimes.co.uk, (20151217), URL: http://www.ibtimes.co.uk/ethereum-based-slock-reveals-first-ever-lock-opened-money-1527014, (20170703), XP055387314 [A] 10 * page 2 * | - |
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Decision to grant a European patent
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May 9, 2022
(Electronic) Receipt
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May 9, 2022
Filing of the translations of the claims
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May 9, 2022
French translation of claims
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May 9, 2022
German translation of the claims
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May 9, 2022
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Jan 26, 2022
Text intended for grant (clean copy)
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Dec 17, 2021
Annex to the communication
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Dec 17, 2021
Consultation by telephone/in person
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Dec 17, 2021
Dec 15, 2021
(Electronic) Receipt
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Dec 15, 2021
Amended claims with annotations
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Dec 15, 2021
Claims
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Dec 15, 2021
Letter accompanying subsequently filed items
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Dec 15, 2021
Dec 14, 2021
Document concerning representation
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Dec 14, 2021
Document concerning representation
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(Electronic) Receipt
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Feb 5, 2021
Amended claims with annotations
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Feb 5, 2021
Claims
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Feb 5, 2021
Letter accompanying subsequently filed items
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Feb 5, 2021
Aug 10, 2020
Annex to the communication
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Aug 10, 2020
Communication from the Examining Division
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Aug 4, 2020
Examination started
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Mar 26, 2020
Payment submission rejected
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Mar 19, 2020
Mar 5, 2020
Letter accompanying subsequently filed items
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Jun 4, 2019
(Electronic) Receipt
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Jun 4, 2019
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Amendments received before examination
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Jun 4, 2019
Letter accompanying subsequently filed items
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May 29, 2019
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Communication to designated inventor
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Dec 4, 2018
Communication to designated inventor
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Nov 15, 2018
Sep 28, 2018
Information regarding early processing
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Sep 20, 2018
(Electronic) Receipt
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Sep 20, 2018
Letter concerning fees and payments
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Sep 13, 2018
(Electronic) Receipt
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Sep 13, 2018
Request for entry into the European phase
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Sep 7, 2018
Information on entry into European phase
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Copy of the international search report
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Nov 2, 2017
Published international application - A1
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