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Extract from the Register of European Patents

EP About this file: EP0491554

EP0491554 - Monitoring partial discharges [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  04.04.1997
Database last updated on 29.10.2024
Most recent event   Tooltip07.12.2007Lapse of the patent in a contracting statepublished on 09.01.2008  [2008/02]
Applicant(s)For all designated states
PATENTED DEVICES (PROPRIETARY) LIMITED
2nd Floor, 1 Park Road, Richmond Johannesburg
Transvaal / ZA
[N/P]
Former [1992/26]For all designated states
PATENTED DEVICES (PROPRIETARY) LIMITED
2nd Floor, 1 Park Road, Richmond
Johannesburg, Transvaal / ZA
Inventor(s)01 / Jenkinson, Christopher Graham
71 Worcester Road, Parkwood
Johannesburg, Transvaal / ZA
[1992/26]
Representative(s)Shindler, Nigel
Brookes Batchellor LLP
1 Boyne Park
Tunbridge Wells Kent TN4 8EL / GB
[N/P]
Former [1992/26]Shindler, Nigel
BATCHELLOR, KIRK & CO. 2 Pear Tree Court Farringdon Road
London EC1R 0DS / GB
Application number, filing date91311713.117.12.1991
[1992/26]
Priority number, dateZA1990001012617.12.1990         Original published format: ZA 9010126
[1992/26]
Filing languageEN
Procedural languageEN
PublicationType: A1 Application with search report 
No.:EP0491554
Date:24.06.1992
Language:EN
[1992/26]
Type: B1 Patent specification 
No.:EP0491554
Date:22.05.1996
Language:EN
[1996/21]
Search report(s)(Supplementary) European search report - dispatched on:EP21.02.1992
ClassificationIPC:G01R31/12
[1992/26]
CPC:
G01R31/12 (EP,US)
Designated contracting statesAT,   BE,   CH,   DE,   DK,   ES,   FR,   GB,   GR,   IT,   LI,   LU,   NL,   SE [1992/26]
TitleGerman:Überwachung von Teilentladungen[1992/26]
English:Monitoring partial discharges[1992/26]
French:Surveillance de décharges partielles[1992/26]
Examination procedure22.12.1992Examination requested  [1993/08]
02.01.1995Despatch of a communication from the examining division (Time limit: M06)
22.05.1995Reply to a communication from the examining division
18.07.1995Despatch of communication of intention to grant (Approval: Yes)
27.11.1995Communication of intention to grant the patent
22.02.1996Fee for grant paid
22.02.1996Fee for publishing/printing paid
Opposition(s)25.02.1997No opposition filed within time limit [1997/21]
Fees paidRenewal fee
19.11.1993Renewal fee patent year 03
30.11.1994Renewal fee patent year 04
13.12.1995Renewal fee patent year 05
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Lapses during opposition  TooltipDK22.05.1996
ES22.05.1996
GR22.05.1996
IT22.05.1996
NL22.05.1996
SE22.08.1996
LU31.12.1996
[2008/02]
Former [2003/07]DK22.05.1996
ES22.05.1996
GR22.05.1996
IT22.05.1996
NL22.05.1996
SE22.08.1996
LU31.12.1996
Former [2002/25]DK22.05.1996
ES22.05.1996
GR22.05.1996
IT22.05.1996
SE22.08.1996
LU31.12.1996
Former [2000/05]DK22.05.1996
GR22.05.1996
IT22.05.1996
SE22.08.1996
LU31.12.1996
Former [1999/42]DK22.05.1996
IT22.05.1996
SE22.08.1996
Former [1998/15]DK22.05.1996
SE22.08.1996
Former [1996/51]SE22.08.1996
Documents cited:Search[A]EP0328109  (HEWLETT PACKARD CO [US])
 [X]  - JOURNAL OF APPLIED PHYSICS vol. 62, 1 November 1981, pages 3605 - 3615; J.P.NOVAK ET AL.: 'REAKDOWN MODEL OF A SHORT PLANE-PARRALEL GAP'
 [Y]  - IEEE TRANS. ELECTR. INSUL. vol. EI-12, no. 3, June 1977, pages 224 - 233; R.MILLER: 'Partial discharge measurements over the frequency range'
 [A]  - ELEKTRIE vol. 40, no. 6, 1986, pages 225 - 227; H.BACHMANN ET AL.: 'Eine neue Steuerung fuer Impulsspannungs-pruefgeneratoren'
 [A]  - IEEE 1988 INT. SYMP. ON ELECTROMAGNETIC COMPATIBILITY 2 August 1988, SEATTLE US pages 1 - 5; KORSTOCK ET AL.: 'POWER REFLECTION IN SUSCEPTIBILITY TESTS OF ELECTRONIC DEVICES'
Examination   - 227; H.BACHMANN ET AL.: 'Eine neue Steuerung fuer Impulsspannungs- pruefgeneratoren'
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.