blank Quick help
blank Maintenance news

Scheduled maintenance

Regular maintenance outages:
between 05.00 and 05.15 hrs CET (Monday to Sunday).

Other outages
Availability

2022.02.11

More...
blank News flashes

Italy joins the Federated Register

Click here for more information on the Federated Register.

2025-06-12

More...
blank Related links

Release notes
European Patent Register Assistant
European Patent Register User Manual
European Patent Register – pocket guide
FAQ - European Patent Register
Federated Register (Flyer)
Global Dossier (Flyer)
Register events
Deep link coverage
Federated Register content
The Patent Information Tour
Fair use charter

Extract from the Register of European Patents

EP About this file: EP3545481

EP3545481 - SYSTEM AND METHOD FOR IMPROVING SECURITY OF SMART CONTRACT ON BLOCKCHAIN [Right-click to bookmark this link]
StatusThe patent has been granted
Status updated on  16.05.2025
Database last updated on 28.03.2026
FormerGrant of patent is intended
Status updated on  14.01.2025
FormerExamination is in progress
Status updated on  23.01.2020
FormerRequest for examination was made
Status updated on  30.08.2019
FormerThe international publication has been made
Status updated on  19.04.2019
Most recent event   Tooltip06.02.2026Lapse of the patent in a contracting state
New state(s): ES		published on 11.03.2026  [2026/11]
Applicant(s)For all designated states
Antchain Technology Pte. Ltd.
128 Beach Road
20-01, Guoco Midtown Office
Singapore 189773 / SG
[2025/13]
Former [2021/02]For all designated states
Advanced New Technologies Co., Ltd.
Cayman Corporate Centre
27 Hospital Road
George Town, Grand Cayman KY1-9008 / KY
Former [2020/50]For all designated states
Alibaba Group Holding Limited
Fourth Floor, One Capital Place P.O. Box 847 George Town
Grand Cayman / KY
Former [2020/45]For all designated states
ADVANCED NEW TECHNOLOGIES CO., LTD.
Cayman Corporate Centre
27 Hospital Road
George Town, Grand Cayman KY1-9008 / KY
Former [2019/40]For all designated states
Alibaba Group Holding Limited
Fourth Floor, One Capital Place P.O. Box 847 George Town
Grand Cayman / KY
Inventor(s)01 / YAO, Zhongxiao
Alibaba Group Legal Department 5/F
Building 3 No.969 West Wen Yi Road
Yuhang District
Hangzhou
Zhejiang 311121 / CN
 [2019/40]
Representative(s)Marks & Clerk LLP
15 Fetter Lane
London EC4A 1BW / GB
[2025/25]
Former [2019/40]Branderhorst, Matthijs Pieter Arie
Marks & Clerk LLP
Fletcher House
Heatley Road The Oxford Science Park
Oxford OX4 4GE / GB
Application number, filing date18865368.727.11.2018
[2019/40]
WO2018CN117666
Filing languageEN
Procedural languageEN
PublicationType: A2 Application without search report
No.:WO2019072283
Date:18.04.2019
Language:EN
[2019/16]
Type: A2 Application without search report 
No.:EP3545481
Date:02.10.2019
Language:EN
The application published by WIPO in one of the EPO official languages on 18.04.2019 takes the place of the publication of the European patent application.
[2019/40]
Type: B1 Patent specification 
No.:EP3545481
Date:18.06.2025
Language:EN
[2025/25]
Search report(s)International search report - published on:CN26.09.2019
(Supplementary) European search report - dispatched on:EP15.01.2020
ClassificationIPC:G06F21/64, G06Q20/40, G06Q30/06, H04L9/08, H04L9/32, H04L9/00
[2025/04]
CPC:
G06Q20/405 (EP,US); G06Q20/382 (CN,KR); G06Q30/0637 (US);
G06F21/00 (RU); G06F21/64 (EP); G06Q20/065 (KR);
G06Q20/3678 (KR); G06Q20/388 (US); G06Q30/06 (EP);
H04L9/0618 (US); H04L9/08 (KR); H04L9/0891 (EP);
H04L9/3239 (EP); H04L9/50 (EP,US); G06Q2220/00 (EP) (-)
Former IPC [2019/40]G06Q20/00, G06Q30/06
Designated contracting statesAL,   AT,   BE,   BG,   CH,   CY,   CZ,   DE,   DK,   EE,   ES,   FI,   FR,   GB,   GR,   HR,   HU,   IE,   IS,   IT,   LI,   LT,   LU,   LV,   MC,   MK,   MT,   NL,   NO,   PL,   PT,   RO,   RS,   SE,   SI,   SK,   SM,   TR [2019/40]
Extension statesBANot yet paid
MENot yet paid
Validation statesKHNot yet paid
MANot yet paid
MDNot yet paid
TNNot yet paid
TitleGerman:SYSTEM UND VERFAHREN ZUR VERBESSERUNG DER SICHERHEIT EINES INTELLIGENTEN VERTRAGES AUF EINER BLOCKKETTE[2019/40]
English:SYSTEM AND METHOD FOR IMPROVING SECURITY OF SMART CONTRACT ON BLOCKCHAIN[2019/40]
French:SYSTÈME ET PROCÉDÉ PERMETTANT D'AMÉLIORER LA SÉCURITÉ D'UN CONTRAT INTELLIGENT SUR UNE CHAÎNE DE BLOCS[2019/40]
Entry into regional phase18.04.2019National basic fee paid 
18.04.2019Search fee paid 
18.04.2019Designation fee(s) paid 
18.04.2019Examination fee paid 
Examination procedure18.04.2019Amendment by applicant (claims and/or description)
18.04.2019Examination requested  [2019/40]
27.01.2020Despatch of a communication from the examining division (Time limit: M04)
03.06.2020Reply to a communication from the examining division
04.06.2021Despatch of a communication from the examining division (Time limit: M06)
30.10.2021Reply to a communication from the examining division
09.08.2023Despatch of a communication from the examining division (Time limit: M04)
18.12.2023Reply to a communication from the examining division
15.01.2025Communication of intention to grant the patent
08.05.2025Fee for grant paid
08.05.2025Fee for publishing/printing paid
08.05.2025Receipt of the translation of the claim(s)
Fees paidRenewal fee
27.11.2020Renewal fee patent year 03
29.11.2021Renewal fee patent year 04
28.11.2022Renewal fee patent year 05
27.11.2023Renewal fee patent year 06
04.10.2024Renewal fee patent year 07
Opt-out from the exclusive  Tooltip
competence of the Unified
Patent Court		 See the Register of the Unified Patent Court for opt-out data
Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Lapses during opposition  TooltipAT18.06.2025
BG18.06.2025
CZ18.06.2025
EE18.06.2025
ES18.06.2025
FI18.06.2025
HR18.06.2025
LV18.06.2025
NL18.06.2025
PL18.06.2025
RO18.06.2025
SK18.06.2025
SM18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
IS18.10.2025
PT20.10.2025
[2026/11]
Former [2026/10]AT18.06.2025
BG18.06.2025
CZ18.06.2025
EE18.06.2025
FI18.06.2025
HR18.06.2025
LV18.06.2025
NL18.06.2025
PL18.06.2025
RO18.06.2025
SK18.06.2025
SM18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
IS18.10.2025
PT20.10.2025
Former [2026/09]AT18.06.2025
BG18.06.2025
CZ18.06.2025
FI18.06.2025
HR18.06.2025
LV18.06.2025
NL18.06.2025
SM18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
IS18.10.2025
PT20.10.2025
Former [2026/08]AT18.06.2025
BG18.06.2025
FI18.06.2025
HR18.06.2025
LV18.06.2025
NL18.06.2025
SM18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
IS18.10.2025
PT20.10.2025
Former [2026/07]BG18.06.2025
FI18.06.2025
HR18.06.2025
LV18.06.2025
NL18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
IS18.10.2025
PT20.10.2025
Former [2026/03]BG18.06.2025
FI18.06.2025
HR18.06.2025
LV18.06.2025
NL18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
PT20.10.2025
Former [2025/52]BG18.06.2025
FI18.06.2025
HR18.06.2025
LV18.06.2025
NL18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
Former [2025/49]BG18.06.2025
FI18.06.2025
HR18.06.2025
LV18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
Former [2025/48]BG18.06.2025
FI18.06.2025
HR18.06.2025
NO18.09.2025
RS18.09.2025
GR19.09.2025
Former [2025/47]BG18.06.2025
FI18.06.2025
NO18.09.2025
GR19.09.2025
Former [2025/46]FI18.06.2025
Documents cited:Search[I] WO2018157778  (ALIBABA GROUP HOLDING LTD et al.) [I] 1-15 * the whole document *
 [I] US2018241546  (LENG TIANQING et al.) [I] 1-15 * the whole document *
 [I] WO2018140913  (SALT LENDING HOLDINGS INC et al.) [I] 1-15 * the whole document *
The EPO accepts no responsibility for the accuracy of data originating from other authorities; in particular, it does not guarantee that it is complete, up to date or fit for specific purposes.