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EP4047860
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EP About this file: EP4047860
| EP4047860 - LONG-DISTANCE QUANTUM KEY DISTRIBUTION [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 11.04.2025 Database last updated on 14.03.2026 | |
| Former | The patent has been granted Status updated on 03.05.2024 | ||
| Former | Grant of patent is intended Status updated on 31.01.2024 | ||
| Former | Request for examination was made Status updated on 22.07.2022 | Most recent event Tooltip | 17.10.2025 | Lapse of the patent in a contracting state New state(s): MC | published on 19.11.2025 [2025/47] | Applicant(s) | For all designated states Terra Quantum AG Kornhausstrasse 25 9000 St. Gallen / CH | [2024/23] |
| Former [2022/34] | For all designated states Terra Quantum AG St. Gallerstr. 16a 9400 Rorschach / CH | Inventor(s) | 01 /
Kirsanov, Nikita 9000 St. Gallen / CH | 02 /
Kenbaev, Nurbolat 9000 St. Gallen / CH | 03 /
Kronberg, Dmitry 9000 St. Gallen / CH | 04 /
Vinokur, Valerii 9000 St. Gallen / CH | 05 /
Lesovik, Gordey 9000 St. Gallen / CH | 06 /
Sekatski, Pavel 9000 St. Gallen / CH | 07 /
Sagingalieva, Asel 9000 St. Gallen / CH | [2024/23] |
| Former [2022/34] | 01 /
Kirsanov, Nikita 9400 Rorschach / CH | ||
| 02 /
Kenbaev, Nurbolat 9400 Rorschach / CH | |||
| 03 /
Kronberg, Dmitry 9400 Rorschach / CH | |||
| 04 /
Vinokur, Valerii 9400 Rorschach / CH | |||
| 05 /
Lesovik, Gordey 9400 Rorschach / CH | |||
| 06 /
Sekatski, Pavel 9400 Rorschach / CH | |||
| 07 /
Sagingalieva, Asel 9400 Rorschach / CH | Representative(s) | Lucke, Andreas Boehmert & Boehmert Anwaltspartnerschaft mbB Pettenkoferstrasse 22 80336 München / DE | [N/P] |
| Former [2022/34] | Kretschmann, Dennis Boehmert & Boehmert Anwaltspartnerschaft mbB Pettenkoferstrasse 22 80336 München / DE | Application number, filing date | 21166427.1 | 31.03.2021 | [2022/34] | Priority number, date | EP20210157942 | 18.02.2021 Original published format: EP 21157942 | [2022/34] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP4047860 | Date: | 24.08.2022 | Language: | EN | [2022/34] | Type: | B1 Patent specification | No.: | EP4047860 | Date: | 05.06.2024 | Language: | EN | [2024/23] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 22.09.2021 | Classification | IPC: | H04L9/08 | [2022/34] | CPC: |
H04L9/0855 (EP);
H04L2209/34 (EP)
| Designated contracting states | AL, 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 [2022/34]
| Title | German: | QUANTENSCHLÜSSELVERTEILUNG ÜBER GROSSE DISTANZEN | [2022/34] | English: | LONG-DISTANCE QUANTUM KEY DISTRIBUTION | [2022/34] | French: | DISTRIBUTION DE CLÉS QUANTIQUES À LONGUE DISTANCE | [2022/34] | Examination procedure | 04.03.2022 | Amendment by applicant (claims and/or description) | 04.03.2022 | Examination requested [2022/34] | 04.03.2022 | Date on which the examining division has become responsible | 01.02.2024 | Communication of intention to grant the patent | 30.04.2024 | Fee for grant paid | 30.04.2024 | Fee for publishing/printing paid | 30.04.2024 | Receipt of the translation of the claim(s) | Opposition(s) | 06.03.2025 | No opposition filed within time limit [2025/20] | Fees paid | Renewal fee | 28.02.2023 | Renewal fee patent year 03 | 26.03.2024 | Renewal fee patent year 04 |
| 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 Tooltip | CZ | 05.06.2024 | ES | 05.06.2024 | HR | 05.06.2024 | MC | 05.06.2024 | PL | 05.06.2024 | SK | 05.06.2024 | SM | 05.06.2024 | NO | 05.09.2024 | RS | 05.09.2024 | GR | 06.09.2024 | IS | 05.10.2024 | [2025/47] |
| Former [2025/10] | CZ | 05.06.2024 | |
| ES | 05.06.2024 | ||
| HR | 05.06.2024 | ||
| PL | 05.06.2024 | ||
| SK | 05.06.2024 | ||
| SM | 05.06.2024 | ||
| NO | 05.09.2024 | ||
| RS | 05.09.2024 | ||
| GR | 06.09.2024 | ||
| IS | 05.10.2024 | ||
| Former [2025/09] | ES | 05.06.2024 | |
| HR | 05.06.2024 | ||
| PL | 05.06.2024 | ||
| NO | 05.09.2024 | ||
| RS | 05.09.2024 | ||
| GR | 06.09.2024 | ||
| IS | 05.10.2024 | ||
| Former [2025/08] | ES | 05.06.2024 | |
| HR | 05.06.2024 | ||
| PL | 05.06.2024 | ||
| NO | 05.09.2024 | ||
| RS | 05.09.2024 | ||
| GR | 06.09.2024 | ||
| Former [2024/49] | ES | 05.06.2024 | |
| HR | 05.06.2024 | ||
| NO | 05.09.2024 | ||
| RS | 05.09.2024 | ||
| GR | 06.09.2024 | ||
| Former [2024/48] | ES | 05.06.2024 | |
| HR | 05.06.2024 | ||
| NO | 05.09.2024 | ||
| GR | 06.09.2024 | ||
| Former [2024/47] | HR | 05.06.2024 | |
| NO | 05.09.2024 | ||
| GR | 06.09.2024 | Documents cited: | Search | [Y] US2014099104 (PETERS NICHOLAS A et al.) | [Y] CN108768542 (UNIV CHINA THREE GORGES CTGU et al.) | [A] CN109194468 (GUOKE QUANTUM COMMUNICATION NETWORK CO LTD et al.) | by applicant | W. VOGELD.G. WELSCHS. WALLENTOWITZ: "Quantum Optics: An Introduction", 2001, WILEY | P. SEKATSKI ET AL.: "Cloning entangled photons to scales one can see", PHYS. REV. A, vol. 82, no. 5, November 2010 (2010-11-01) | B. SANGUINETTI ET AL.: "Quantum cloning for absolute radiometry", PHYS. REV. LETT., vol. 105, no. 8, August 2010 (2010-08-01) | D. J. C. MACKAY: "Information Theory, Inference and Learning Algorithms", 2003, CAMBRIDGE UNIVERSITY PRESS | C. H. BENNETT ET AL.: "Privacy amplification by public discussion", SIAM J. COMPUT., vol. 17, no. 2, April 1988 (1988-04-01), pages 210 - 229, XP008060433, DOI: 10.1137/0217014 DOI: http://dx.doi.org/10.1137/0217014 | G. BRASSARDL. SALVAIL: "Proc. EUROCRYPT '93", 1994, SPRINGER, article "Secret-key reconciliation by public discussion", pages: 410 - 423 |