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Extract from the Register of European Patents

EP About this file: EP0957075

EP0957075 - Process for the preparation of 3,5,5-trimethylcyclohexa-3-ene-1-one (beta-isophorone) by isomerization of 3,5,5-trimethylcyclohexa-2-ene-1-one (alpha-isophorone) [Right-click to bookmark this link]
StatusThe application is deemed to be withdrawn
Status updated on  13.07.2002
Database last updated on 25.09.2024
Most recent event   Tooltip13.07.2002Application deemed to be withdrawnpublished on 28.08.2002  [2002/35]
Applicant(s)For all designated states
Degussa GmbH
Bennigsenplatz 1
40474 Düsseldorf / DE
[N/P]
Former [2001/18]For all designated states
Degussa AG
Bennigsenplatz 1
40474 Düsseldorf / DE
Former [1999/46]For all designated states
Degussa-Hüls Aktiengesellschaft
60287 Frankfurt am Main / DE
Inventor(s)01 / Krill, Steffen Dr.
Friedrich-Hölderlin-Weg 23
67346 Speyer / DE
02 / Kretz, Stephan
Fr.-W.-von-Bauer-Strasse 1
63599 Biebergemünd / DE
03 / Hasselbach, Hans-Joachim Dr.
Deutschordenstrasse 6
63571 Gelnhausen / DE
04 / Huthmacher, Klaus Dr.
Lärchenweg 18
63584 Gelnhausen / DE
05 / Hahn, Rainer Dr.
Schlossgasse 13
63654 Büdingen / DE
06 / Schmitt, Hermann
Berliner Strasse 24
63517 Rodenbach / DE
[1999/46]
Application number, filing date99108497.130.04.1999
[1999/46]
Priority number, dateDE199812137913.05.1998         Original published format: DE 19821379
[1999/46]
Filing languageDE
Procedural languageDE
PublicationType: A1 Application with search report 
No.:EP0957075
Date:17.11.1999
Language:DE
[1999/46]
Search report(s)(Supplementary) European search report - dispatched on:EP28.07.1999
ClassificationIPC:C07C45/67, C07C45/82, C07C49/603
[1999/46]
CPC:
C07C45/67 (EP,US); C07C45/82 (EP,US)
C-Set:
C07C45/67, C07C49/603 (EP,US);
C07C45/82, C07C49/603 (US,EP)
Designated contracting statesBE,   CH,   DE,   DK,   FR,   GB,   IT,   LI,   NL,   SE [2000/30]
Former [1999/46]AT,  BE,  CH,  CY,  DE,  DK,  ES,  FI,  FR,  GB,  GR,  IE,  IT,  LI,  LU,  MC,  NL,  PT,  SE 
Extension statesSI30.04.1999
TitleGerman:Verbessertes Verfahren zur Herstellung von 3,5,5-Trimethylcyclohexa-3-en-1-on (Beta-Isophoron) durch Isomerisierung von 3,5,5-Trimethylcyclohexa-2-en-1-on (Alpha-Isophoron) (II)[1999/46]
English:Process for the preparation of 3,5,5-trimethylcyclohexa-3-ene-1-one (beta-isophorone) by isomerization of 3,5,5-trimethylcyclohexa-2-ene-1-one (alpha-isophorone)[1999/46]
French:Procédé pour la préparation de 3,5,5-triméthylcyclohexa-3-ène-1-one (beta-isophorone) par isomérisation de 3,5,5-triméthylcyclohexa-2-ène-1-one (alpha-isophorone)[1999/46]
Examination procedure30.04.1999Examination requested  [1999/46]
07.12.1999Application withdrawn by applicant  [2000/05]
deletedDeletion: Application withdrawn by applicant  [2000/06]
22.03.2001Despatch of a communication from the examining division (Time limit: M04)
13.07.2001Reply to a communication from the examining division
30.07.2001Despatch of a communication from the examining division (Time limit: M06)
12.02.2002Application deemed to be withdrawn, date of legal effect  [2002/35]
21.03.2002Despatch of communication that the application is deemed to be withdrawn, reason: reply to the communication from the examining division not received in time  [2002/35]
Fees paidRenewal fee
23.03.2001Renewal fee patent year 03
Penalty fee
Additional fee for renewal fee
30.04.200204   M06   Not yet paid
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Documents cited:Search[Y]US2246032  (BENT FRANKLIN A) [Y] 1-4* page 3, column 1, line 37 - line 38; claim - *;
 [Y]US3397120  (DIANA WILLIAM D, et al) [Y] 1-4 * column 7, line 66 - line 72; claim 1 *;
 [X]FR2253730  (FIRMENICH & CIE [CH]) [X] 1-4,11 * page 5; claim 9 *;
 [X]EP0832870  (DEGUSSA [DE]) [X] 1-3,5-11 * the whole document *
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.