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Extract from the Register of European Patents

EP About this file: EP0606331

EP0606331 - AN OPTICAL AMPLIFIER [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  30.01.1998
Database last updated on 04.11.2024
Most recent event   Tooltip30.07.2004Change - lapse in a contracting state
Updated state(s): LU		published on 15.09.2004  [2004/38]
Applicant(s)For all designated states
BRITISH TELECOMMUNICATIONS public limited company
81 Newgate Street London
EC1A 7AJ / GB
[N/P]
Former [1994/29]For all designated states
BRITISH TELECOMMUNICATIONS public limited company
81 Newgate Street
London EC1A 7AJ / GB
Inventor(s)01 / CASSIDY, Stephen, Anthony
79 Humber Doucy Lane
Ipswich Suffolk IP4 3N6 / GB
02 / WILKINSON, Mark, Robert
57 Bladen Drive
Ipswich Suffolk, IP4 5UA / GB
[1994/29]
Representative(s)Roberts, Simon Christopher, et al
BT Group Legal
Intellectual Property Department
PP C5A. BT Centre
81 Newgate Street, London
EC1A 7AJ / GB
[N/P]
Former [1994/29]Roberts, Simon Christopher, et al
BRITISH TELECOM Intellectual Property Unit 13th Floor 151, Gower Street
London, WC1E 6BA / GB
Application number, filing date92920675.301.10.1992
[1994/29]
WO1992GB01808
Priority number, dateGB1991002092501.10.1991         Original published format: GB 9120925
[1994/29]
Filing languageEN
Procedural languageEN
PublicationType: A1 Application with search report
No.:WO9307664
Date:15.04.1993
Language:EN
[1993/10]
Type: A1 Application with search report 
No.:EP0606331
Date:20.07.1994
Language:EN
The application published by WIPO in one of the EPO official languages on 15.04.1993 takes the place of the publication of the European patent application.
[1994/29]
Type: B1 Patent specification 
No.:EP0606331
Date:26.03.1997
Language:EN
[1997/13]
Search report(s)International search report - published on:EP15.04.1993
ClassificationIPC:H01S3/06, G02B6/34
[1994/29]
CPC:
H01S3/10023 (EP); H01S2301/04 (EP)
Designated contracting statesAT,   BE,   CH,   DE,   DK,   ES,   FR,   GB,   IE,   IT,   LI,   LU,   NL,   SE [1994/29]
TitleGerman:Optischer Verstärker[1994/29]
English:AN OPTICAL AMPLIFIER[1994/29]
French:AMPLIFICATEUR OPTIQUE[1994/29]
Entry into regional phase17.03.1994National basic fee paid 
17.03.1994Designation fee(s) paid 
17.03.1994Examination fee paid 
Examination procedure22.01.1993Request for preliminary examination filed
International Preliminary Examining Authority: DE
17.03.1994Examination requested  [1994/29]
21.09.1994Despatch of a communication from the examining division (Time limit: M04)
01.05.1995Reply to a communication from the examining division
05.06.1996Despatch of communication of intention to grant (Approval: Yes)
24.06.1996Communication of intention to grant the patent
31.10.1996Despatch of communication that the application is deemed to be withdrawn, reason: fee for grant / fee for printing not paid in time
30.12.1996Fee for grant paid
30.12.1996Fee for publishing/printing paid
Opposition(s)30.12.1997No opposition filed within time limit [1998/12]
Request for further processing for:30.12.1996Request for further processing filed
30.12.1996Full payment received (date of receipt of payment)
Request granted
21.01.1997Decision despatched
01.05.1995Request for further processing filed
06.05.1995Full payment received (date of receipt of payment)
Request deemed not to be filed
30.05.1995Decision despatched
Fees paidRenewal fee
08.08.1994Renewal fee patent year 03
05.10.1995Renewal fee patent year 04
13.03.1996Renewal 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  TooltipAT26.03.1997
BE26.03.1997
CH26.03.1997
DK26.03.1997
ES26.03.1997
LI26.03.1997
NL26.03.1997
SE26.06.1997
IE01.10.1997
LU01.10.1997
[2004/38]
Former [2003/07]AT26.03.1997
BE26.03.1997
CH26.03.1997
DK26.03.1997
ES26.03.1997
LI26.03.1997
NL26.03.1997
SE26.06.1997
IE01.10.1997
LU31.10.1997
Former [2002/25]AT26.03.1997
BE26.03.1997
CH26.03.1997
DK26.03.1997
ES26.03.1997
LI26.03.1997
SE26.06.1997
IE01.10.1997
LU31.10.1997
Former [2001/01]AT26.03.1997
BE26.03.1997
CH26.03.1997
DK26.03.1997
LI26.03.1997
SE26.06.1997
IE01.10.1997
LU31.10.1997
Former [2000/07]AT26.03.1997
BE26.03.1997
CH26.03.1997
DK26.03.1997
LI26.03.1997
SE26.06.1997
LU31.10.1997
Former [1998/15]AT26.03.1997
BE26.03.1997
CH26.03.1997
DK26.03.1997
LI26.03.1997
SE26.06.1997
Former [1998/11]AT26.03.1997
BE26.03.1997
CH26.03.1997
LI26.03.1997
SE26.06.1997
Former [1998/04]AT26.03.1997
BE26.03.1997
CH26.03.1997
LI26.03.1997
Former [1997/49]AT26.03.1997
BE26.03.1997
Former [1997/42]AT26.03.1997
Cited inInternational search[A]EP0438759  (UNITED TECHNOLOGIES CORP [US])
 [X]  - IEEE PHOTONICS TECHNOLOGY LETTERS vol. 3, no. 2, February 1991, NEW YORK US pages 118 - 120 M. TACHIBANA ET AL. 'Erbium-doped fiber amplifier with flattened gain spectrum'
 [Y]  - OPTICAL FIBER COMMUNICATION CONFERENCE. TECHNICAL DIGEST SERIES vol. 1, 22 January 1990, WASHINGTON US page 27 P. YENNADHIOU ET AL. 'D-fiber grating reflection filters (Pap. TUG 4)' cited in the application
    [ ] - JOURNAL OF LIGHTWAVE TECHNOLOGY. vol. 3, no. 5, October 1985, NEW YORK US pages 1041 - 1043 W.V. SORIN ET AL. 'A single-mode fiber evanescent grating reflector'
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.