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Extract from the Register of European Patents

EP About this file: EP0254231

EP0254231 - Optical heterodyne receiver, especially for PSK modulated light [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  02.04.1992
Database last updated on 03.08.2024
Most recent event   Tooltip28.11.2003Lapse of the patent in a contracting state
New state(s): ES		published on 14.01.2004  [2004/03]
Applicant(s)For all designated states
SIEMENS AKTIENGESELLSCHAFT
Werner-von-Siemens-Str. 1
DE-80333 München / DE
[N/P]
Former [1988/04]For all designated states
SIEMENS AKTIENGESELLSCHAFT
Wittelsbacherplatz 2
D-80333 München / DE
Inventor(s)01 / Pietzsch, Joachim, Dr.-Ing.
Waakirchner Strasse 34
D-8000 München 70 / DE
[1988/04]
Application number, filing date87110409.717.07.1987
[1988/04]
Priority number, dateDE1986362460121.07.1986         Original published format: DE 3624601
DE1987372293610.07.1987         Original published format: DE 3722936
[1988/04]
Filing languageDE
Procedural languageDE
PublicationType: A1 Application with search report 
No.:EP0254231
Date:27.01.1988
Language:DE
[1988/04]
Type: B1 Patent specification 
No.:EP0254231
Date:29.05.1991
Language:DE
[1991/22]
Search report(s)(Supplementary) European search report - dispatched on:EP23.11.1987
ClassificationIPC:H04B10/06
[1991/22]
CPC:
H04B10/61 (EP,US); H04B10/63 (EP,US); H04B10/64 (EP,US);
H04L27/2272 (EP,US)
Former IPC [1988/04]H04B9/00
Designated contracting statesAT,   BE,   CH,   DE,   ES,   FR,   GB,   GR,   IT,   LI,   NL,   SE [1988/04]
TitleGerman:Optischer Überlagerungsempfänger für insbesondere phasensprungmoduliertes Licht[1988/04]
English:Optical heterodyne receiver, especially for PSK modulated light[1988/04]
French:Récepteur optique hétérodyne, en particulier pour lumière modulée par déplacement de phase[1988/04]
Examination procedure08.06.1988Examination requested  [1988/32]
29.06.1990Despatch of a communication from the examining division (Time limit: M04)
16.10.1990Reply to a communication from the examining division
22.11.1990Despatch of communication of intention to grant (Approval: Yes)
05.12.1990Communication of intention to grant the patent
20.12.1990Fee for grant paid
20.12.1990Fee for publishing/printing paid
Opposition(s)03.03.1992No opposition filed within time limit [1992/21]
Fees paidRenewal fee
26.07.1989Renewal fee patent year 03
26.07.1990Renewal fee patent year 04
20.12.1990Renewal fee patent year 05
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  TooltipBE29.05.1991
GR29.05.1991
NL29.05.1991
SE29.05.1991
AT17.07.1991
CH31.07.1991
LI31.07.1991
ES09.09.1991
[2004/03]
Former [2000/04]BE29.05.1991
GR29.05.1991
NL29.05.1991
SE29.05.1991
AT17.07.1991
CH31.07.1991
LI31.07.1991
Former [1993/03]BE29.05.1991
NL29.05.1991
SE29.05.1991
AT17.07.1991
CH31.07.1991
LI31.07.1991
Former [1992/30]BE29.05.1991
NL29.05.1991
SE29.05.1991
CH31.07.1991
LI31.07.1991
Former [1992/26]NL29.05.1991
SE29.05.1991
CH31.07.1991
LI31.07.1991
Former [1992/05]NL29.05.1991
SE29.05.1991
Former [1991/51]SE29.05.1991
Documents cited:Search[AP]EP0194786  (INT STANDARD ELECTRIC CORP [US])
 [YD]  - FIRST INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS, London, 26.-28. April 1983, Seiten 48-52, IEEE, Londen, GB; A. DANDRIDGE et al.: "Fiber optic interferometric sensor development at NRL"
 [YD]  - JOURNAL OF LIGHTWAVE TECHNOLOGY, Band LT-3, Nr. 5, Oktober 1985, Seiten 1110-1122, IEEE, New York, US; G.L. ABBAS et al.: "A dual-detector optical heterodyne receiver for local oscillator noise suppression"
 [A]  - ELECTRONICS LETTERS, Band 22, Nr. 1, 2. Januar 1986, Seiten 9-11, Stevenage, Herts, GB; A.W. DAVIS et al.: "Coherent optical receiver for 680 Mbit/s using phase diversity"
 [A]  - JOURNAL OF LIGHTWAVE TECHNOLOGY, Band LT-4, Nr. 2, Februar 1986, Seiten 182-195, IEEE, New York, US; L.G. KAZOVSKY: "Balanced phase-locked loops for optical homodyne receivers: performance analysis, design considerations, and laser linewidth requirements"
 [A]  - ELECTRONICS LETTERS, Band 21, Nr. 19, 12. September 1985, Seiten 867-868, Stevenage, Herts, GB; T.G. HODGKINSON et al.: "Demodulation of optical DPSK using in-phase and quadrature detection"
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.