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EP0521514
European procedure
Extract from the Register of European Patents
EP About this file: EP0521514
| EP0521514 - Optical frequency division multiplexing transmission system [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 12.02.1999 Database last updated on 22.08.2024 | Most recent event Tooltip | 12.02.1999 | No opposition filed within time limit | published on 31.03.1999 [1999/13] | Applicant(s) | For all designated states Hitachi, Ltd. 6, Kanda Surugadai 4-chome Chiyoda-ku Tokyo 101 / JP | [N/P] |
| Former [1993/01] | For all designated states HITACHI, LTD. 6, Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 101 / JP | Inventor(s) | 01 /
Tsushima, Hideaki Ribesuto Wako, 25-8-203, Niikura-2-chome Wako-shi / JP | 02 /
Sasaki, Shinya Kopo Kato 102, 488-2, Nakamachi Kodaira-shi / JP | 03 /
Kuboki, Katsuhiko Hitachi Daini Kyoshinryo 1-3, Higashikoigabuki-3-chome Kokubunji-shi / JP | [1993/01] | Representative(s) | Strehl Schübel-Hopf & Partner Maximilianstrasse 54 80538 München / DE | [N/P] |
| Former [1993/01] | Strehl Schübel-Hopf Groening & Partner Maximilianstrasse 54 D-80538 München / DE | Application number, filing date | 92111277.7 | 03.07.1992 | [1993/01] | Priority number, date | JP19910165360 | 05.07.1991 Original published format: JP 16536091 | JP19910324353 | 09.12.1991 Original published format: JP 32435391 | [1993/01] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0521514 | Date: | 07.01.1993 | Language: | EN | [1993/01] | Type: | A3 Search report | No.: | EP0521514 | Date: | 21.09.1994 | Language: | EN | [1994/38] | Type: | B1 Patent specification | No.: | EP0521514 | Date: | 08.04.1998 | Language: | EN | [1998/15] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 03.08.1994 | Classification | IPC: | H04B10/14, H04J14/02 | [1994/21] | CPC: |
H04B10/572 (EP,US);
H04B10/50 (EP,US);
H04B10/506 (EP,US);
H04B10/508 (EP,US)
|
| Former IPC [1993/01] | H04B10/14 | Designated contracting states | DE, FR, GB [1993/01] | Title | German: | Optisches Übertragungssystem mit Frequenzmultiplexierung | [1993/01] | English: | Optical frequency division multiplexing transmission system | [1993/01] | French: | Système de transmission optique avec multiplexage à division de fréquence | [1993/01] | Miscellaneous | EPB 1998/15: (deleted) | EPB 1998/15: (deleted) | EPB 1998/15: (deleted) | EPB 1997/47: Teilanmeldung 97115846.4 eingereicht am 11/09/97 | EPB 1997/47: Divisional application 97115846.4 filed on 11/09/97 | EPB 1997/47: Demande divisionnaire 97115846.4 déposée le 11/09/97 | Examination procedure | 13.02.1995 | Examination requested [1995/15] | 18.07.1995 | Despatch of a communication from the examining division (Time limit: M06) | 29.01.1996 | Reply to a communication from the examining division | 10.05.1996 | Despatch of a communication from the examining division (Time limit: M06) | 20.11.1996 | Reply to a communication from the examining division | 13.03.1997 | Despatch of communication of intention to grant (Approval: No) | 26.09.1997 | Despatch of communication of intention to grant (Approval: later approval) | 06.10.1997 | Communication of intention to grant the patent | 12.01.1998 | Fee for grant paid | 12.01.1998 | Fee for publishing/printing paid | Divisional application(s) | EP97115846.4 / EP0814578 | Opposition(s) | 09.01.1999 | No opposition filed within time limit [1999/13] | Fees paid | Renewal fee | 26.07.1994 | Renewal fee patent year 03 | 24.07.1995 | Renewal fee patent year 04 | 29.07.1996 | Renewal fee patent year 05 | 28.07.1997 | Renewal fee patent year 06 |
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| Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court. | Documents cited: | Search | [XAY]EP0298598 (AMERICAN TELEPHONE & TELEGRAPH [US]) [X] 35 * column 5, line 50 - column 7, line 24 * * column 12, line 54 - column 13, line 2 * * figures 11,14 * [A] 4-11,14-34,36-47 [Y] 1-3,12,13; | [YA]EP0275610 (PHILIPS NV [NL]) [Y] 48-51 * column 4, line 39 - column 5, line 27 * * column 5, line 45 - column 6, line 22 * * figures 1-3 * [A] 53,62; | [YA]DE3509354 (LICENTIA GMBH [DE]) [Y] 48-51 * page 9, line 28 - page 10, line 5 * * page 11, line 7 - line 19 * * page 11, line 30 - page 12, line 15 * * page 13, line 1 - line 5 * * figures 3,5 * [A] 52,54-61 | [Y] - GAMBINI ET AL, "Laser frequency stabilisation for high bit-rate FSK multichannel coherent systems", IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE AND EXHIBITION, HOLLYWOOD, FLA, US, (198811), pages 473 - 477 [Y] 1-3,12,13,17,29 * page 475, column R, line 12 - line 16; figure 1 * | [Y] - LINKE, "Frequency division multiplexed optical networks using heterodyne detection", IEEE NETWORK: THE MAGAZINE OF COMPUTER COMMUNICATIONS, NEW YORK US, (198903), vol. 3, no. 2, doi:doi:10.1109/65.21906, pages 13 - 20, XP000026492 [Y] 17,29 * page 17, column R, line 2 - line 13 * * page 17, column R, line 54 - line 58 * * figures 7,8 * DOI: http://dx.doi.org/10.1109/65.21906 | Examination | JPH0287841 | - PATENT ABSTRACTS OF JAPAN, vol. 14, no. 278, & JP02087841 A 19900328 (NIPPON TELEGRAPH & TELEPHONE) |