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Extract from the Register of European Patents

EP About this file: EP0464359

EP0464359 - Process for the preparation of N-substituted pyrrolidones [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  23.02.1996
Database last updated on 22.01.2025
Most recent event   Tooltip23.02.1996No opposition filed within time limitpublished on 10.04.1996 [1996/15]
Applicant(s)For all designated states
BASF Aktiengesellschaft
Carl-Bosch-Strasse 38
67063 Ludwigshafen / DE
[N/P]
Former [1992/02]For all designated states
BASF Aktiengesellschaft
Carl-Bosch-Strasse 38
D-67063 Ludwigshafen / DE
Inventor(s)01 / Koehler, Ulrich, Dr.
Werderstrasse 48
W-6900 Heidelberg / DE
02 / Siegel, Hardo, Dr.
Hans-Purrmann-Allee 25
W-6720 Speyer / DE
[1992/02]
Application number, filing date91108502.525.05.1991
[1992/02]
Priority number, dateDE1990401824207.06.1990         Original published format: DE 4018242
[1992/02]
Filing languageDE
Procedural languageDE
PublicationType: A2 Application without search report 
No.:EP0464359
Date:08.01.1992
Language:DE
[1992/02]
Type: A3 Search report 
No.:EP0464359
Date:24.06.1992
Language:DE
[1992/26]
Type: B1 Patent specification 
No.:EP0464359
Date:19.04.1995
Language:DE
[1995/16]
Search report(s)(Supplementary) European search report - dispatched on:EP07.05.1992
ClassificationIPC:C07D207/267
[1992/26]
CPC:
C07D207/267 (EP,US)
Former IPC [1992/02]C07D207/38
Designated contracting statesBE,   CH,   DE,   ES,   FR,   GB,   IT,   LI,   NL [1992/02]
TitleGerman:Verfahren zur Herstellung von N-substituierten Pyrrolidonen[1992/02]
English:Process for the preparation of N-substituted pyrrolidones[1992/02]
French:Procédé pour la préparation de pyrrolidones N-substitués[1992/02]
Examination procedure22.05.1992Examination requested  [1992/30]
10.08.1994Despatch of communication of intention to grant (Approval: Yes)
21.09.1994Communication of intention to grant the patent
22.10.1994Fee for grant paid
22.10.1994Fee for publishing/printing paid
Opposition(s)20.01.1996No opposition filed within time limit [1996/15]
Fees paidRenewal fee
19.05.1993Renewal fee patent year 03
17.05.1994Renewal 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]US3109005  (LIDOV REX E);
 [A]EP0304696  (BASF AG [DE])
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.