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EP0451822
European procedure
Extract from the Register of European Patents
EP About this file: EP0451822
| EP0451822 - Use of macrocyclic compounds as components for ferroelectric liquid crystal mixtures [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 24.12.1996 Database last updated on 22.08.2024 | Most recent event Tooltip | 24.12.1996 | No opposition filed within time limit | published on 12.02.1997 [1997/07] | Applicant(s) | For all designated states HOECHST AKTIENGESELLSCHAFT 65926 Frankfurt am Main / DE | [N/P] |
| Former [1991/42] | For all designated states HOECHST AKTIENGESELLSCHAFT D-65926 Frankfurt am Main / DE | Inventor(s) | 01 /
Harada, Takamasa 4-35-15, Kikari, Inzai-machi Inbagun, Chiba / JP | 02 /
Rösch, Norbert, Dr. Geisenheimer Strasse 95 W-6000 Frankfurt am Main / DE | 03 /
Wegener, Peter, Dr. Am Eichkopf 4 W-6240 Königstein/Taunus / DE | [1991/42] | Application number, filing date | 91105701.6 | 10.04.1991 | [1991/42] | Priority number, date | DE19904011804 | 12.04.1990 Original published format: DE 4011804 | [1991/42] | Filing language | DE | Procedural language | DE | Publication | Type: | A2 Application without search report | No.: | EP0451822 | Date: | 16.10.1991 | Language: | DE | [1991/42] | Type: | A3 Search report | No.: | EP0451822 | Date: | 18.03.1992 | Language: | DE | [1992/12] | Type: | B1 Patent specification | No.: | EP0451822 | Date: | 14.02.1996 | [1996/07] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 31.01.1992 | Classification | IPC: | C09K19/54, C09K19/56, G02F1/137, C09K19/58 | [1992/12] | CPC: |
C09K19/584 (EP,US);
C09K19/00 (KR);
C09K19/54 (EP,US)
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| Former IPC [1991/42] | C09K19/04, G02F1/133 | Designated contracting states | DE [1995/50] |
| Former [1991/42] | AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LI, LU, NL, SE | Title | German: | Verwendung von makrocyclischen Verbindungen als Komponente für ferroelektrische Flüssigkristallmischungen | [1991/42] | English: | Use of macrocyclic compounds as components for ferroelectric liquid crystal mixtures | [1991/42] | French: | Utilisation de composés macrocycliques comme composants de mélanges liquides cristallins ferroélectriques | [1991/42] | Examination procedure | 27.05.1992 | Examination requested [1992/30] | 31.08.1994 | Despatch of a communication from the examining division (Time limit: M06) | 08.03.1995 | Reply to a communication from the examining division | 05.04.1995 | Despatch of communication of intention to grant (Approval: Yes) | 17.08.1995 | Communication of intention to grant the patent | Opposition(s) | 15.11.1996 | No opposition filed within time limit [1997/07] | Fees paid | Renewal fee | 09.03.1993 | Renewal fee patent year 03 | 10.03.1994 | Renewal fee patent year 04 | 02.05.1995 | Renewal fee patent year 05 |
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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 | [X]FR2344617 (MERCK PATENT GMBH [DE]); | [XP]WO9015117 (MITSUBISHI CHEM IND [JP]); | [E]WO9108272 (HOECHST AG [DE]) |