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EP0475640
European procedure
Extract from the Register of European Patents
EP About this file: EP0475640
| EP0475640 - Polarization switching light source, optical receiver, and coherent optical transmission system [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 21.11.1997 Database last updated on 05.07.2024 | Most recent event Tooltip | 21.11.1997 | No opposition filed within time limit | published on 07.01.1998 [1998/02] | Applicant(s) | For all designated states Kabushiki Kaisha Toshiba 72, Horikawa-cho, Saiwai-ku Kawasaki-shi Kanagawa-ken 210-8572 / JP | [N/P] |
| Former [1995/01] | For all designated states KABUSHIKI KAISHA TOSHIBA 72, Horikawa-cho, Saiwai-ku Kawasaki-shi, Kanagawa-ken 210, Tokyo / JP | ||
| Former [1992/12] | For all designated states Kabushiki Kaisha Toshiba 72, Horikawa-cho Saiwai-ku Kawasaki-shi / JP | Inventor(s) | 01 /
Suzuki, Nobuo, c/o Intellectual Property Division K.K. Toshiba, 1-1 Shibaura 1-chome, Minato-ku Tokyo 105 / JP | [1992/12] | Representative(s) | Freed, Arthur Woolf, et al Marks & Clerk Incorporating Edward Evans Barker 90 Long Acre London WC2E 9RA / GB | [N/P] |
| Former [1992/12] | Freed, Arthur Woolf, et al MARKS & CLERK, 57-60 Lincoln's Inn Fields London WC2A 3LS / GB | Application number, filing date | 91307937.2 | 30.08.1991 | [1992/12] | Priority number, date | JP19900226531 | 30.08.1990 Original published format: JP 22653190 | [1992/12] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0475640 | Date: | 18.03.1992 | Language: | EN | [1992/12] | Type: | A3 Search report | No.: | EP0475640 | Date: | 21.10.1992 | Language: | EN | [1992/43] | Type: | B1 Patent specification | No.: | EP0475640 | Date: | 08.01.1997 | Language: | EN | [1997/02] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 28.08.1992 | Classification | IPC: | H04B10/12 | [1992/12] | CPC: |
H04B10/532 (EP,US)
| Designated contracting states | DE, FR [1996/46] |
| Former [1992/12] | DE, FR, GB | Title | German: | Lichtquelle für Polarisationsschaltung, optischer Empfänger und kohärentes optisches Übertragungssystem | [1997/02] | English: | Polarization switching light source, optical receiver, and coherent optical transmission system | [1992/12] | French: | Source optique pour la commutation de polarisation, récepteur optique et système de transmission optique cohérent | [1992/12] |
| Former [1992/12] | Lichtquelle für Polarisationsschaltung, optischer Empfänger und Kohärentes optisches Übertragungssystem | Examination procedure | 18.09.1991 | Examination requested [1992/12] | 02.02.1995 | Despatch of a communication from the examining division (Time limit: M06) | 24.07.1995 | Reply to a communication from the examining division | 14.05.1996 | Despatch of communication of intention to grant (Approval: Yes) | 09.07.1996 | Communication of intention to grant the patent | 07.10.1996 | Fee for grant paid | 07.10.1996 | Fee for publishing/printing paid | Opposition(s) | 09.10.1997 | No opposition filed within time limit [1998/02] | Fees paid | Renewal fee | 11.08.1993 | Renewal fee patent year 03 | 09.08.1994 | Renewal fee patent year 04 | 09.08.1995 | Renewal fee patent year 05 | 10.08.1996 | 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 | [A]GB2213026 (PLESSEY CO PLC [GB]); | [A]EP0329186 (FUJITSU LTD [JP]); | [A]EP0357799 (FUJITSU LTD [JP]) | [AD] - ELECTRONICS LETTERS, vol. 24, no. 15, July 21, 1988 The Institution of Electrical Engineers, London I.M.I. HABBAB et al. "Phase- -insensitive zero-IF coherent optical system using phase switching", pages 974-976 | [AD] - JOURNAL OF LIGHTWARE TECHNOLOGY, vol. 6, no. 10, October 1988, Institute of Electrical and Electronics Engineers, New York I.M.I. HABBAB et al. "Polarization-Switching Techniques for Coherent Optical Communications", pages 1537-1548 |