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Extract from the Register of European Patents

EP About this file: EP0843665

EP0843665 - METHOD OF PREPARING 1,2-DIMETHYL-3,5-DIARYLPYRAZOLIUM METHYLSULPHATES [Right-click to bookmark this link]
StatusThe application is deemed to be withdrawn
Status updated on  13.08.2004
Database last updated on 02.11.2024
Most recent event   Tooltip27.06.2008Change - applicantpublished on 30.07.2008  [2008/31]
Applicant(s)For all designated states
BASF Aktiengesellschaft
Carl-Bosch-Strasse 38
67063 Ludwigshafen / DE
[2008/31]
Former [1998/22]For all designated states
BASF AKTIENGESELLSCHAFT
67056 Ludwigshafen / DE
Inventor(s)01 / MERKLE, Hans, Rupert
Brahmsstrasse 4
D-67061 Ludwigshafen / DE
02 / FRETSCHNER, Erich
Hirtweg 59
D-69239 Neckarsteinach / DE
[1998/22]
Application number, filing date96927616.126.07.1996
[1998/22]
WO1996EP03316
Priority number, dateDE199512905608.08.1995         Original published format: DE 19529056
[1998/22]
Filing languageDE
Procedural languageDE
PublicationType: A1 Application with search report
No.:WO9706148
Date:20.02.1997
Language:DE
[1997/09]
Type: A1 Application with search report 
No.:EP0843665
Date:27.05.1998
Language:DE
The application published by WIPO in one of the EPO official languages on 20.02.1997 takes the place of the publication of the European patent application.
[1998/22]
Search report(s)International search report - published on:EP20.02.1997
ClassificationIPC:C07D231/12
[1998/22]
CPC:
C07D231/12 (EP,US)
Designated contracting statesAT,   BE,   CH,   DE,   ES,   FR,   GB,   IT,   LI,   NL [1998/22]
TitleGerman:VERFAHREN ZUR HERSTELLUNG VON 1,2-DIMETHYL-3,5-DIARYL-PYRAZOLIUM-METHYLSULFATEN[1998/22]
English:METHOD OF PREPARING 1,2-DIMETHYL-3,5-DIARYLPYRAZOLIUM METHYLSULPHATES[1998/22]
French:PROCEDE DE PREPARATION DE 1,2-DIMETHYL-3,5-DIARYLPYRAZOLIUMMETHYLSULFATES[1998/22]
Entry into regional phase11.11.1997National basic fee paid 
11.11.1997Designation fee(s) paid 
11.11.1997Examination fee paid 
Examination procedure06.12.1996Request for preliminary examination filed
International Preliminary Examining Authority: EP
11.11.1997Examination requested  [1998/22]
05.05.2003Despatch of a communication from the examining division (Time limit: M06)
10.11.2003Reply to a communication from the examining division
14.01.2004Despatch of a communication from the examining division (Time limit: M02)
25.03.2004Application deemed to be withdrawn, date of legal effect  [2004/40]
03.05.2004Despatch of communication that the application is deemed to be withdrawn, reason: reply to the communication from the examining division not received in time  [2004/40]
Fees paidRenewal fee
29.07.1998Renewal fee patent year 03
16.07.1999Renewal fee patent year 04
14.07.2000Renewal fee patent year 05
14.07.2001Renewal fee patent year 06
18.07.2002Renewal fee patent year 07
31.07.2003Renewal fee patent year 08
02.08.2004Renewal fee patent year 09
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Cited inInternational search[YD]US3882142  (WALWORTH BRYANT LEONIDAS, et al) [YD] 1 * siehe Spalte 7, Zeilen 28-39 und Spalte 4, Zeile 12 *;
 [Y]JPS4810445B  ;
 [Y]  - DATABASE WPI, 1, Derwent World Patents Index, Database accession no. 73-19462U, XP002017293 & JPS4810445B B1 00000000 (NIPPON KAYAKU KK) [Y] 1 * abstract *
 [Y]  - GUYOT ET AL., "Action of concentrated sulfuric acid on methyl alcohol", CHEMICAL ABSTRACTS, (1920), vol. 14, no. 10, Database accession no. 403, page 403, XP002017291 [Y] 1 * abstract *
 [Y]  - GUYOT ET AL., "Action of sulfuric anhydride and oleum on methyl alcohol. Preparation of dimethyl sulfate", CHEMICAL ABSTRACTS, (1920), vol. 14, no. 10, Database accession no. 539, page 539, XP002017292 [Y] 1 * abstract *
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.