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EP0522577
European procedure
Extract from the Register of European Patents
EP About this file: EP0522577
| EP0522577 - Process for the preparation of pure 3,3',4,4'-tetraaminobiphenyl [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 16.08.1996 Database last updated on 31.08.2024 | Most recent event Tooltip | 16.08.1996 | No opposition filed within time limit | published on 02.10.1996 [1996/40] | Applicant(s) | For all designated states HOECHST AKTIENGESELLSCHAFT 65926 Frankfurt am Main / DE | [N/P] |
| Former [1993/02] | For all designated states HOECHST AKTIENGESELLSCHAFT D-65926 Frankfurt am Main / DE | Inventor(s) | 01 /
Vorwerk, Edgar, Dr. Breslauer Strasse 41 W-6233 Kelkheim (Taunus) / DE | [1993/02] | Application number, filing date | 92111765.1 | 10.07.1992 | [1993/02] | Priority number, date | DE19914123033 | 12.07.1991 Original published format: DE 4123033 | [1993/02] | Filing language | DE | Procedural language | DE | Publication | Type: | A2 Application without search report | No.: | EP0522577 | Date: | 13.01.1993 | Language: | DE | [1993/02] | Type: | A3 Search report | No.: | EP0522577 | Date: | 12.05.1993 | Language: | DE | [1993/19] | Type: | B1 Patent specification | No.: | EP0522577 | Date: | 11.10.1995 | Language: | DE | [1995/41] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 22.03.1993 | Classification | IPC: | C07C209/84 | [1993/02] | CPC: |
C07C209/84 (EP,US)
| Designated contracting states | BE, CH, DE, FR, GB, IT, LI, NL [1993/02] | Title | German: | Verfahren zur Herstellung von reinem 3,3',4,4'-Tetraaminobiphenyl | [1993/02] | English: | Process for the preparation of pure 3,3',4,4'-tetraaminobiphenyl | [1993/02] | French: | Procédé pour la préparation de 3,3',4,4'-tetraaminbiphenyle | [1993/02] | Examination procedure | 17.06.1993 | Examination requested [1993/38] | 14.11.1994 | Despatch of communication of intention to grant (Approval: Yes) | 20.12.1994 | Communication of intention to grant the patent | 30.03.1995 | Fee for grant paid | 30.03.1995 | Fee for publishing/printing paid | Opposition(s) | 12.07.1996 | No opposition filed within time limit [1996/40] | Fees paid | Renewal fee | 08.06.1994 | Renewal fee patent year 03 | 31.07.1995 | Renewal fee patent year 04 |
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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 | [AD]EP0061168 (HOECHST AG [DE]); | [A]US3390180 (MICHAEL FONTANA CELESTE, et al) |