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Extract from the Register of European Patents

EP About this file: EP0128489

EP0128489 - Process for the preparation of dialkyl esters of succinylsuccinic acid [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  22.09.1990
Database last updated on 31.08.2024
Most recent event   Tooltip22.09.1990No opposition filed within time limitpublished on 14.11.1990 [1990/46]
Applicant(s)For all designated states
HOECHST AKTIENGESELLSCHAFT
65926 Frankfurt am Main / DE
[N/P]
Former [1984/51]For all designated states
HOECHST AKTIENGESELLSCHAFT
D-65926 Frankfurt am Main / DE
Inventor(s)01 / Heise, Hartmut, Dr.
Am Rehsteig 8
D-6232 Bad Soden am Taunus / DE
02 / Hintzmann, Manfred, Dr.
Sachsenring 48
D-6238 Hofheim am Taunus / DE
03 / Brückmann, Konrad
Limburger Strasse 42e
D-6240 Köningstein/Taunus / DE
[1984/51]
Application number, filing date84106302.701.06.1984
[1984/51]
Priority number, dateDE1983332041506.06.1983         Original published format: DE 3320415
[1984/51]
Filing languageDE
Procedural languageDE
PublicationType: A2 Application without search report 
No.:EP0128489
Date:19.12.1984
Language:DE
[1984/51]
Type: A3 Search report 
No.:EP0128489
Date:06.08.1986
Language:DE
[1986/32]
Type: B1 Patent specification 
No.:EP0128489
Date:29.11.1989
Language:DE
[1989/48]
Search report(s)(Supplementary) European search report - dispatched on:EP19.06.1986
ClassificationIPC:C07C67/343, C07C69/757
[1984/51]
CPC:
C07C67/343 (EP)
Designated contracting statesBE,   CH,   DE,   FR,   GB,   IT,   LI [1984/51]
TitleGerman:Verfahren zur Herstellung von Succinylobernsteinsäuredialkylestern[1984/51]
English:Process for the preparation of dialkyl esters of succinylsuccinic acid[1984/51]
French:Procédé de préparation d'esters dialkyliques de l'acide succinylsuccinique[1984/51]
Examination procedure09.10.1986Examination requested  [1986/49]
17.01.1989Despatch of communication of intention to grant (Approval: Yes)
31.05.1989Communication of intention to grant the patent
08.08.1989Fee for grant paid
08.08.1989Fee for publishing/printing paid
Opposition(s)30.08.1990No opposition filed within time limit [1990/45]
Fees paidRenewal fee
14.05.1986Renewal fee patent year 03
15.05.1987Renewal fee patent year 04
11.05.1988Renewal fee patent year 05
13.05.1989Renewal fee patent year 06
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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[X]JP50019738  ;
 [Y]US3024268  (STRUVE WILLIAM S)
 [X]  - CHEMICAL ABSTRACTS, Band 83, 1975, Seite 464, Nr. 27711h, Columbus, Ohio, US; & JP-A-50 019 738 (MITSUBISHI CHEMICAL INDUSTRIES CO., LTD.) 01.03.1975, & JP50019738 A 00000000
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.