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Extract from the Register of European Patents

EP About this file: EP0361272

EP0361272 - Optically active esters of 5-ethyl and 5-vinyl 1,3-dioxolane-carboxylic acid, their use as dopants in liquid-crystal mixtures, and liquid-crystal mixtures containing these esters [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  01.04.1995
Database last updated on 13.09.2024
Most recent event   Tooltip30.11.2007Lapse of the patent in a contracting state
Updated state(s): FR		published on 02.01.2008  [2008/01]
Applicant(s)For all designated states
HOECHST AKTIENGESELLSCHAFT
65926 Frankfurt am Main / DE
[N/P]
Former [1990/14]For all designated states
HOECHST AKTIENGESELLSCHAFT
D-65926 Frankfurt am Main / DE
Inventor(s)01 / Müller, Ingrid, Dr.
Am Pfingstbrunnen 1
D-6238 Hofheim am Taunus / DE
02 / Dübal, Hans-Rolf, Dr.
Heuhohlweg 6
D-6240 Königstein/Taunus / DE
03 / Escher, Claus, Dr.
Amselweg 3
D-6109 Mühltal / DE
04 / Hemmerling, Wolfgang, Dr.
Billtalstrasse 32
D-6231 Sulzbach / DE
05 / Illian, Gerhard, Dr.
Rauenthaler Weg 32
D-6000 Frankfurt am Main 71 / DE
06 / Murakami, Mikio
Bahnstrasse 2c
D-6240 Königstein/Taunus / DE
07 / Ohlendorf, Dieter, Dr.
Am Kühlen Grund 4
D-6237 Liederbach / DE
08 / Wingen, Rainer, Dr.
Rotkäppchenweg 10
D-6234 Hattersheim am Main / DE
[1990/14]
Application number, filing date89117265.219.09.1989
[1990/14]
Priority number, dateDE1988383250324.09.1988         Original published format: DE 3832503
[1990/14]
Filing languageDE
Procedural languageDE
PublicationType: A1 Application with search report 
No.:EP0361272
Date:04.04.1990
Language:DE
[1990/14]
Type: B1 Patent specification 
No.:EP0361272
Date:01.06.1994
Language:DE
[1994/22]
Search report(s)(Supplementary) European search report - dispatched on:EP12.12.1989
ClassificationIPC:C07D405/12, C07D317/30, C07D405/14, C09K19/34, G02F1/13, G09F9/35
[1990/14]
CPC:
C07D405/12 (EP,KR,US); C07D317/32 (EP,US); C09K19/3441 (EP,US);
C09K19/3444 (EP,US); C09K19/3466 (EP,US); C09K19/3491 (EP,US);
C09K19/3497 (EP,US); C09K19/3405 (EP,US) (-)
Designated contracting statesAT,   BE,   CH,   DE,   FR,   GB,   IT,   LI,   NL,   SE [1990/14]
TitleGerman:Optische aktive Ester der 5-Ethyl- und der 5-Vinyl-1,3-dioxolan-4-carbonsäure, ihre Verwendung als Dotierstoffe in Flüssigkristallmischungen und die Ester enthaltende Flüssigkristallmischungen[1994/22]
English:Optically active esters of 5-ethyl and 5-vinyl 1,3-dioxolane-carboxylic acid, their use as dopants in liquid-crystal mixtures, and liquid-crystal mixtures containing these esters[1990/14]
French:Esters optiquement actifs de l'acide éthyl-5 et vinyl-5 dioxolanne-1,3 carboxylique-4, leur utilisation comme agents de dopage dans des mélanges de cristaux liquides et mélanges de cristaux liquides cntenant ces esters[1990/14]
Former [1990/14]Neue optische aktive Ester der 5-Ethyl- und der 5-Vinyl-1,3-dioxolan-4-carbonsäure, ihre Verwendung als Dotierstoffe in Flüssigkristallmischungen und die neuen Ester enthaltende Flüssigkristallmischungen
File destroyed:20.04.2002
Examination procedure06.08.1990Examination requested  [1990/40]
12.06.1992Despatch of a communication from the examining division (Time limit: M02)
21.08.1992Reply to a communication from the examining division
18.03.1993Despatch of a communication from the examining division (Time limit: M02)
28.05.1993Reply to a communication from the examining division
27.07.1993Despatch of communication of intention to grant (Approval: Yes)
30.11.1993Communication of intention to grant the patent
11.02.1994Fee for grant paid
11.02.1994Fee for publishing/printing paid
Opposition(s)02.03.1995No opposition filed within time limit [1995/21]
Fees paidRenewal fee
21.12.1990Renewal fee patent year 03
12.08.1992Renewal fee patent year 04
26.08.1993Renewal 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  TooltipBE01.06.1994
FR01.06.1994
GB01.06.1994
IT01.06.1994
NL01.06.1994
SE01.09.1994
AT19.09.1994
CH30.09.1994
LI30.09.1994
[2006/14]
Former [1999/42]BE01.06.1994
GB01.06.1994
IT01.06.1994
NL01.06.1994
SE01.09.1994
AT19.09.1994
CH30.09.1994
LI30.09.1994
FR28.10.1994
Former [1996/14]BE01.06.1994
GB01.06.1994
NL01.06.1994
SE01.09.1994
AT19.09.1994
CH30.09.1994
LI30.09.1994
FR28.10.1994
Former [1995/32]BE01.06.1994
GB01.06.1994
NL01.06.1994
SE01.09.1994
CH30.09.1994
LI30.09.1994
FR28.10.1994
Former [1995/24]BE01.06.1994
GB01.06.1994
NL01.06.1994
SE01.09.1994
FR28.10.1994
Former [1995/19]BE01.06.1994
GB01.06.1994
NL01.06.1994
SE01.09.1994
Former [1995/13]BE01.06.1994
NL01.06.1994
SE01.09.1994
Former [1995/12]BE01.06.1994
SE01.09.1994
Former [1995/05]SE01.09.1994
Documents cited:Search[A]DE3604898  (HOECHST AG [DE]);
 [XPD]DE3713273  (HOECHST AG [DE]);
 [XP]EP0307880  (HOECHST AG [DE])
 [AP]  - CHEMICAL ABSTRACTS, Band 110, Nr. 20, 25. Mai 1989, Columbus, Ohio, USA DUEBAL et al. "Three classes of new chiral dopants: synthesis and physical qualification as dopants for practical ferroelectric liquid crystal mixtures" Seite 709, Spalte 2, Zusammenfassung-Nr. 183 512a
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.