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Extract from the Register of European Patents

EP About this file: EP3596858

EP3596858 - QUANTUM KEY DISTRIBUTION IN OPTICAL COMMUNICATIONS NETWORK [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  02.08.2024
Database last updated on 26.04.2025
FormerThe patent has been granted
Status updated on  25.08.2023
FormerGrant of patent is intended
Status updated on  03.05.2023
FormerExamination is in progress
Status updated on  25.11.2021
FormerRequest for examination was made
Status updated on  20.12.2019
FormerThe international publication has been made
Status updated on  22.09.2018
Formerunknown
Status updated on  24.03.2018
Most recent event   Tooltip07.02.2025Lapse of the patent in a contracting state
New state(s): CH		published on 12.03.2025  [2025/11]
Applicant(s)For all designated states
British Telecommunications public limited company
1 Braham Street
London E1 8EE / GB
[2022/07]
Former [2020/04]For all designated states
British Telecommunications Public Limited Company
81 Newgate Street
London EC1A 7AJ / GB
Inventor(s)01 / PARKIN, Neil
Ground Floor
Faraday Building
1 Kightrider Street
London EC4V 5BT / GB
02 / LORD, Andrew
Ground Floor
Faraday Building
1 Kightrider Street
London EC4V 5BT / GB
 [2020/04]
Representative(s)British Telecommunications public limited company Intellectual Property Department
9th Floor
One Braham
Braham Street
London E1 8EE / GB
[2023/39]
Former [2020/04]British Telecommunications public limited company Intellectual Property Department
Ground Floor, Faraday Building
1 Knightrider Street
London EC4V 5BT / GB
Application number, filing date18710843.609.03.2018
[2020/04]
WO2018EP55948
Priority number, dateEP2017016133016.03.2017         Original published format: EP 17161330
[2020/04]
Filing languageEN
Procedural languageEN
PublicationType: A1 Application with search report
No.:WO2018166920
Date:20.09.2018
Language:EN
[2018/38]
Type: A1 Application with search report 
No.:EP3596858
Date:22.01.2020
Language:EN
The application published by WIPO in one of the EPO official languages on 20.09.2018 takes the place of the publication of the European patent application.
[2020/04]
Type: B1 Patent specification 
No.:EP3596858
Date:27.09.2023
Language:EN
[2023/39]
Search report(s)International search report - published on:EP20.09.2018
ClassificationIPC:H04J14/02, H04L9/08, H04B10/70
[2020/04]
CPC:
H04J14/0275 (EP); H04L9/0852 (EP,US); H04B10/70 (EP);
H04B10/85 (US); H04J14/0256 (EP); H04Q11/0005 (US);
H04Q11/0062 (US); H04Q2011/0016 (US); H04Q2011/0086 (US) (-)
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 [2020/04]
Extension statesBANot yet paid
MENot yet paid
Validation statesKHNot yet paid
MANot yet paid
MDNot yet paid
TNNot yet paid
TitleGerman:KOMMUNIKATIONSNETZKNOTEN[2023/18]
English:QUANTUM KEY DISTRIBUTION IN OPTICAL COMMUNICATIONS NETWORK[2020/04]
French:NOEUD DE RÉSEAU DE COMMUNICATIONS[2023/21]
Former [2020/04]QUANTENSCHLÜSSELVERTEILUNG IN EINEM OPTISCHEN KOMMUNIKATIONSNETZWERK
Former [2020/04]DISTRIBUTION DE CLÉ QUANTIQUE DANS UN RÉSEAU DE COMMUNICATION OPTIQUE
Entry into regional phase30.08.2019National basic fee paid 
30.08.2019Designation fee(s) paid 
30.08.2019Examination fee paid 
Examination procedure30.08.2019Examination requested  [2020/04]
30.08.2019Date on which the examining division has become responsible
16.04.2020Amendment by applicant (claims and/or description)
24.11.2021Despatch of a communication from the examining division (Time limit: M06)
01.06.2022Reply to a communication from the examining division
04.05.2023Communication of intention to grant the patent
22.08.2023Fee for grant paid
22.08.2023Fee for publishing/printing paid
22.08.2023Receipt of the translation of the claim(s)
Opposition(s)28.06.2024No opposition filed within time limit [2024/36]
Fees paidRenewal fee
31.01.2020Renewal fee patent year 03
31.01.2021Renewal fee patent year 04
31.12.2021Renewal fee patent year 05
03.01.2023Renewal fee patent year 06
Opt-out from the exclusive  Tooltip
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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  TooltipAT27.09.2023
BG27.09.2023
CZ27.09.2023
DK27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
IT27.09.2023
LT27.09.2023
LV27.09.2023
MC27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SI27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
IE09.03.2024
LU09.03.2024
BE31.03.2024
CH31.03.2024
[2025/11]
Former [2025/10]AT27.09.2023
BG27.09.2023
CZ27.09.2023
DK27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
IT27.09.2023
LT27.09.2023
LV27.09.2023
MC27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SI27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
IE09.03.2024
LU09.03.2024
BE31.03.2024
Former [2025/08]AT27.09.2023
BG27.09.2023
CZ27.09.2023
DK27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
IT27.09.2023
LT27.09.2023
LV27.09.2023
MC27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SI27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
LU09.03.2024
BE31.03.2024
Former [2024/52]AT27.09.2023
BG27.09.2023
CZ27.09.2023
DK27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
IT27.09.2023
LT27.09.2023
LV27.09.2023
MC27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SI27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
LU09.03.2024
Former [2024/51]AT27.09.2023
BG27.09.2023
CZ27.09.2023
DK27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
IT27.09.2023
LT27.09.2023
LV27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SI27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
Former [2024/49]AT27.09.2023
CZ27.09.2023
DK27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
IT27.09.2023
LT27.09.2023
LV27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SI27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
Former [2024/33]AT27.09.2023
CZ27.09.2023
DK27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
IT27.09.2023
LT27.09.2023
LV27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
Former [2024/26]AT27.09.2023
CZ27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
IT27.09.2023
LT27.09.2023
LV27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
Former [2024/25]AT27.09.2023
CZ27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
LT27.09.2023
LV27.09.2023
NL27.09.2023
PL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
Former [2024/23]AT27.09.2023
CZ27.09.2023
EE27.09.2023
ES27.09.2023
FI27.09.2023
HR27.09.2023
LT27.09.2023
LV27.09.2023
NL27.09.2023
RO27.09.2023
RS27.09.2023
SE27.09.2023
SK27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
PT29.01.2024
Former [2024/20]FI27.09.2023
HR27.09.2023
LT27.09.2023
LV27.09.2023
NL27.09.2023
RS27.09.2023
SE27.09.2023
SM27.09.2023
NO27.12.2023
GR28.12.2023
IS27.01.2024
Former [2024/14]FI27.09.2023
HR27.09.2023
LT27.09.2023
LV27.09.2023
NL27.09.2023
RS27.09.2023
SE27.09.2023
NO27.12.2023
GR28.12.2023
Former [2024/10]FI27.09.2023
HR27.09.2023
LT27.09.2023
LV27.09.2023
RS27.09.2023
SE27.09.2023
NO27.12.2023
GR28.12.2023
Former [2024/09]FI27.09.2023
LT27.09.2023
SE27.09.2023
NO27.12.2023
GR28.12.2023
Former [2024/08]LT27.09.2023
NO27.12.2023
GR28.12.2023
Cited inInternational search[A]US2007212063  (MELI FAUSTO [IT], et al) [A] 1-21 * page 1, paragraphs 1,6 * * page 2, paragraph 17 - paragraph 26 * * page 3, paragraph 36 - paragraph 37; figures 1-4 *;
 [XI]US2012195428  (WELLBROCK GLENN A [US], et al) [X] 1-3,11-15 * page 1, paragraph 10 * * page 2, paragraph 14 * * page 4, paragraph 45 - page 5, paragraph 49 * * figures 8-10 * [I] 4-10,16-21;
 [A]US2014341575  (CHOI IRIS [GB], et al) [A] 1-21 * page 1, paragraph 6 - page 2, paragraph 35 * * page 3, paragraph 42 - page 6, paragraph 84 * * figures 2-6 *;
 [A]  - NWEKE N I ET AL, "EDFA bypass and filtering architecture enabling QKD+WDM coexistence on mid-span amplified links", TECHNICAL DIGEST CD-ROM / CONFERENCE ON LASERS AND ELECTRO-OPTICS, QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE, CONFERENCE ON PHOTONIC APPLICATIONS, SYSTEMS AND TECHNOLOGIES : LONG BEACH CONVENTION CENTER, LONG BEACH, CALIFORNIA, USA ; CLEO/QELS, (20060521), ISBN 978-1-55752-813-1, pages 1 - 2, XP031394634 [A] 1-21 * the whole document *
 [A]  - RUNSER R J ET AL, "Demonstration of 1.3 /spl mu/m quantum key distribution (QKD) compatibility with 1.5 /spl mu/m metropolitan wavelength division multiplexed (WDM) systems", 2005 OPTICAL FIBER COMMUNICATIONS CONFERENCE TECHNICAL DIGEST (IEEE CAT. NO. 05CH37672) IEEE PISCATAWAY, NJ, USA, IEEE, (20050306), vol. 3, ISBN 978-1-55752-783-7, pages 206 - 208, XP010831698 [A] 1-21 * the whole document *
 [A]  - ROHDE H ET AL, "Quantum key distribution integrated into commercial WDM systems", OPTICAL FIBER COMMUNICATION/NATIONAL FIBER OPTIC ENGINEERS CONFERENCE, 2008. OFC/NFOEC 2008. CONFERENCE ON, IEEE, PISCATAWAY, NJ, USA, (20080224), ISBN 978-1-55752-856-8, pages 1 - 3, XP031391760 [A] 1-21 * 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.