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EP0224328
European procedure
Extract from the Register of European Patents
EP About this file: EP0224328
| EP0224328 - Ferroelectric liquid crystal optical devices [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 11.06.1994 Database last updated on 20.07.2024 | Most recent event Tooltip | 11.06.1994 | No opposition filed within time limit | published on 03.08.1994 [1994/31] | Applicant(s) | For all designated states AT&T Corp. 32 Avenue of the Americas New York, NY 10013-2412 / US | [1987/23] | Inventor(s) | 01 /
Goodby, John William 11 Fern Way Berkeley Heights New Jersey 07922 / US | 02 /
Patel, Jayantilal Shamjibhai 2352 Longfellow Avenue Scotch Plains New Jersey 07076 / US | [1987/23] | Representative(s) | Johnston, Kenneth Graham, et al Lucent Technologies EUR-IP UK Ltd Unit 18, Core 3 Workzone Innova Business Park Electric Avenue Enfield, EN3 7XB / GB | [N/P] |
| Former [1987/23] | Johnston, Kenneth Graham, et al AT&T (UK) Ltd. 5 Mornington Road Woodford Green Essex, IG8 OTU / GB | Application number, filing date | 86308100.6 | 20.10.1986 | [1987/23] | Priority number, date | US19850791918 | 28.10.1985 Original published format: US 791918 | [1987/23] | Filing language | EN | Procedural language | EN | Publication | Type: | A1 Application with search report | No.: | EP0224328 | Date: | 03.06.1987 | Language: | EN | [1987/23] | Type: | B1 Patent specification | No.: | EP0224328 | Date: | 11.08.1993 | Language: | EN | [1993/32] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 18.03.1987 | Classification | IPC: | G02F1/137, C09K19/08 | [1993/32] | CPC: |
G02F1/141 (EP,US);
C09K19/0225 (EP,US);
C09K19/2021 (EP,US);
C09K2019/2035 (EP,US)
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| Former IPC [1987/23] | G02F1/137, // C09K19/08 | Designated contracting states | DE, GB, NL [1987/23] | Title | German: | Optische Vorrichtungen mit ferroelektrischen Flüssigkristallen | [1987/23] | English: | Ferroelectric liquid crystal optical devices | [1987/23] | French: | Dispositifs optiques à cristaux liquides ferro-électriques | [1987/23] | Examination procedure | 09.11.1987 | Examination requested [1988/02] | 25.01.1990 | Despatch of a communication from the examining division (Time limit: M06) | 08.06.1990 | Reply to a communication from the examining division | 14.01.1991 | Despatch of a communication from the examining division (Time limit: M06) | 18.07.1991 | Reply to a communication from the examining division | 04.02.1992 | Despatch of a communication from the examining division (Time limit: M06) | 03.08.1992 | Reply to a communication from the examining division | 09.10.1992 | Despatch of communication of intention to grant (Approval: Yes) | 15.02.1993 | Communication of intention to grant the patent | 19.04.1993 | Fee for grant paid | 19.04.1993 | Fee for publishing/printing paid | Opposition(s) | 12.05.1994 | No opposition filed within time limit [1994/31] | Fees paid | Renewal fee | 13.10.1988 | Renewal fee patent year 03 | 19.10.1989 | Renewal fee patent year 04 | 19.10.1990 | Renewal fee patent year 05 | 21.10.1991 | Renewal fee patent year 06 | 19.10.1992 | Renewal fee patent year 07 |
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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 | FR2567533 [ ] (CANON KK [JP]); | US4615586 [ ] (GEARY JOHN M [US], et al); | US4613209 [ ] (GOODBY JOHN W [US], et al); | DE3427597 [ ] (AMERICAN TELEPHONE & TELEGRAPH [US]); | EP0160302 [ ] (HITACHI LTD [JP]) | [A] - FERRO ELECTRICS, vol. 59, 1984 J.S.PATEL et al. "A Reliable Method of Alignment for Smetic Liquid Crystals" page 137-144 | Examination | EP0149398 | - CRYSTAL RESEARCH AND TECHNOLOGY, vol. 18 (1983), Nr. 1, 101-106. |