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Extract from the Register of European Patents

EP About this file: EP0379315

EP0379315 - Electro-optical liquid crystal device [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  23.03.1995
Database last updated on 18.01.2025
Most recent event   Tooltip23.03.1995No opposition filed within time limitpublished on 10.05.1995 [1995/19]
Applicant(s)For all designated states
Seiko Epson Corporation
4-1, Nishishinjuku 2-chome Shinjuku-ku
Tokyo / JP
[N/P]
Former [1994/32]For all designated states
SEIKO EPSON CORPORATION
4-1, Nishishinjuku 2-chome
Shinjuku-ku Tokyo / JP
Former [1990/30]For all designated states
SEIKO EPSON CORPORATION
4-1, Nishi-shinjuku 2-chome, Shinjuku-ku
Tokyo 163 / JP
Inventor(s)01 / Okumura, Osamu
c/o Seiko Epson Corporation, 3-5 Owa 3-chome
Suwa-shi, Nagano-ken / JP
02 / Toki, Motoyuki
c/o Seiko Epson Corporation, 3-5 Owa 3-chome
Suwa-shi, Nagano-ken / JP
03 / Horiguchi, Hirosada
c/o Seiko Epson Corporation, 3-5 Owa 3-chome
Suwa-shi, Nagano-ken / JP
[1990/30]
Representative(s)Sturt, Clifford Mark, et al
Miller Sturt Kenyon
9 John Street
London
WC1N 2ES / GB
[N/P]
Former [1995/13]Sturt, Clifford Mark, et al
J. MILLER & CO. 34 Bedford Row Holborn
London WC1R 4JH / GB
Former [1993/26]Miller, Joseph
J. MILLER & CO. 34 Bedford Row, Holborn
London WC1R 4JH / GB
Former [1990/30]Caro, William Egerton
J. MILLER & CO. Lincoln House 296-302 High Holborn
London WC1V 7JH / GB
Application number, filing date90300373.912.01.1990
[1990/30]
Priority number, dateJP1989001040519.01.1989         Original published format: JP 1040589
JP1989003662316.02.1989         Original published format: JP 3662389
JP1989003757017.02.1989         Original published format: JP 3757089
JP1989004560927.02.1989         Original published format: JP 4560989
JP1989007281524.03.1989         Original published format: JP 7281589
JP1989007611428.03.1989         Original published format: JP 7611489
JP1989008743606.04.1989         Original published format: JP 8743689
JP1989010501925.04.1989         Original published format: JP 10501989
JP1989010857127.04.1989         Original published format: JP 10857189
[1990/30]
Filing languageEN
Procedural languageEN
PublicationType: A2 Application without search report 
No.:EP0379315
Date:25.07.1990
Language:EN
[1990/30]
Type: A3 Search report 
No.:EP0379315
Date:24.04.1991
Language:EN
[1991/17]
Type: B1 Patent specification 
No.:EP0379315
Date:18.05.1994
Language:EN
[1994/20]
Search report(s)(Supplementary) European search report - dispatched on:EP07.03.1991
ClassificationIPC:G02F1/1335
[1990/30]
CPC:
G02F1/13363 (EP,US); G02F1/133637 (EP,US); G02F1/1393 (EP,US);
G02F1/1396 (EP,US); G02F1/1397 (EP,US); G02F2413/02 (EP,US);
G02F2413/08 (EP,US); G02F2413/14 (EP,US); G02F2413/15 (EP,US) (-)
Designated contracting statesDE,   FR,   GB [1990/30]
TitleGerman:Elektrooptische Flüssigkristall-Anzeigevorrichtung[1990/30]
English:Electro-optical liquid crystal device[1990/30]
French:Dispositif d'affichage électro-optique à cristal liquide[1990/30]
Examination procedure13.08.1991Examination requested  [1991/41]
24.03.1993Despatch of communication of intention to grant (Approval: Yes)
09.07.1993Communication of intention to grant the patent
06.10.1993Fee for grant paid
06.10.1993Fee for publishing/printing paid
Opposition(s)21.02.1995No opposition filed within time limit [1995/19]
Fees paidRenewal fee
30.01.1992Renewal fee patent year 03
29.01.1993Renewal fee patent year 04
26.01.1994Renewal fee patent year 05
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Documents cited:Search[AP]EP0349900  (STANLEY ELECTRIC CO LTD [JP], et al);
 [A]EP0239433  (COMMISSARIAT ENERGIE ATOMIQUE [FR]);
 [A]GB1462978  (RANK ORGANISATION LTD);
 [A]EP0246842  (SEIKO EPSON CORP [JP])
 [A]  - CONFERENCE RECORD OF THE 1988 INTERNATIONAL DISPLAY RESEARCH CONFERENCE, San Diego, CA, 4th - 6th October 1988, pages 159-160, IEEE, New York, US; I. FUKUDA et al.: "Achromatic supertwisted nematic LCD using birefringent film"
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.