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EP0428030
European procedure
Extract from the Register of European Patents
EP About this file: EP0428030
| EP0428030 - Process for the separation of gamma-butyrolactone from mixtures containing diethyl succinate [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 12.08.1995 Database last updated on 03.05.2025 | Most recent event Tooltip | 12.08.1995 | No opposition filed within time limit | published on 04.10.1995 [1995/40] | Applicant(s) | For all designated states BASF Aktiengesellschaft Carl-Bosch-Strasse 38 67063 Ludwigshafen / DE | [N/P] |
| Former [1991/21] | For all designated states BASF Aktiengesellschaft Carl-Bosch-Strasse 38 D-67063 Ludwigshafen / DE | Inventor(s) | 01 /
Fischer, Rolf, Dr. Bergstrasse 98 W-6900 Heidelberg / DE | 02 /
Stops, Peter Limburgstrasse 12 W-6701 Altrip / DE | 03 /
Brunner, Erwin, Dr. Neuhausener Weg 1 W-6700 Ludwigshafen / DE | 04 /
Weigand, Rudolf Luisenstrasse 13 W-6835 Bruehl / DE | [1991/21] | Application number, filing date | 90121090.6 | 03.11.1990 | [1991/21] | Priority number, date | DE19893938121 | 16.11.1989 Original published format: DE 3938121 | [1991/21] | Filing language | DE | Procedural language | DE | Publication | Type: | A2 Application without search report | No.: | EP0428030 | Date: | 22.05.1991 | Language: | DE | [1991/21] | Type: | A3 Search report | No.: | EP0428030 | Date: | 21.11.1991 | Language: | DE | [1991/47] | Type: | B1 Patent specification | No.: | EP0428030 | Date: | 12.10.1994 | Language: | DE | [1994/41] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 02.10.1991 | Classification | IPC: | C07D307/33 | [1991/21] | CPC: |
C07D315/00 (EP,US);
Y10S203/20 (EP,US)
| Designated contracting states | BE, DE, FR, GB, IT, NL [1991/21] | Title | German: | Verfahren zur Abtrennung von gamma-Butyrolacton aus Gemischen, die Bernsteinsäurediethylester enthalten | [1991/21] | English: | Process for the separation of gamma-butyrolactone from mixtures containing diethyl succinate | [1991/21] | French: | Procédé pour la séparation de gamma-butyrolactone de mélanges contenant du succinate de diéthyle | [1991/21] | Examination procedure | 27.12.1990 | Examination requested [1991/21] | 21.02.1994 | Despatch of communication of intention to grant (Approval: No) | 06.04.1994 | Despatch of communication of intention to grant (Approval: later approval) | 12.04.1994 | Communication of intention to grant the patent | 13.05.1994 | Fee for grant paid | 13.05.1994 | Fee for publishing/printing paid | Opposition(s) | 13.07.1995 | No opposition filed within time limit [1995/40] | Fees paid | Renewal fee | 11.11.1992 | Renewal fee patent year 03 | 20.11.1993 | Renewal fee patent year 04 |
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