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Extract from the Register of European Patents

EP About this file: EP0572888

EP0572888 - Process for the continuous preparation of big particles silica sols [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  06.09.1996
Database last updated on 09.07.2024
Most recent event   Tooltip06.09.1996No opposition filed within time limitpublished on 23.10.1996 [1996/43]
Applicant(s)For all designated states
BAYER AG
51368 Leverkusen / DE
[N/P]
Former [1993/49]For all designated states
BAYER AG
D-51368 Leverkusen / DE
Inventor(s)01 / Brekau, Uwe, Dr.
Jakob Böhme-Strasse 8
W-5000 Köln 80 / DE
02 / Block, Hans-Dieter, Dr.
Biesenbach 49
W-5090 Leverkusen 3 / DE
03 / Moretto, Hans-Heinrich, Dr.
Sürderstrasse 50
W-5090 Leverkusen / DE
04 / Schmidt, Peter, Dr.
Drosselweg 6
W-5090 Leverkusen 3 / DE
05 / Schober, Peter, Dr.
Mülheimer Strasse 93
W-5090 Leverkusen / DE
06 / Ludovici, Werner, Dr.
Grüner Weg 26
W-5068 Odenthal / DE
[1995/44]
Former [1993/49]01 / Brekau, Uwe, Dr.
Jakob-Böhme-Strasse 8
W-5000 Köln 80 / DE
02 / Block, Hans-Dieter, Dr.
Biesenbach 49
W-5090 Leverkusen 3 / DE
03 / Moretto, Hans-Heinrich, Dr.
Sürderstrasse 50
W-5090 Leverkusen / DE
04 / Schmidt, Peter, Dr.
Drosselweg 6
W-5090 Leverkusen 3 / DE
05 / Schober, Peter, Dr.
Mülheimer Strasse 93
W-5090 Leverkusen / DE
06 / Ludovici, Werner, Dr.
Grüner Weg 26
W-5068 Odenthal / DE
Application number, filing date93108339.824.05.1993
[1993/49]
Priority number, dateDE1992421830603.06.1992         Original published format: DE 4218306
[1993/49]
Filing languageDE
Procedural languageDE
PublicationType: A1 Application with search report 
No.:EP0572888
Date:08.12.1993
Language:DE
[1993/49]
Type: B1 Patent specification 
No.:EP0572888
Date:02.11.1995
Language:DE
[1995/44]
Search report(s)(Supplementary) European search report - dispatched on:EP05.10.1993
ClassificationIPC:C01B33/143
[1993/49]
CPC:
C01B33/1435 (EP,US)
Designated contracting statesDE,   ES,   FR,   GB,   IT,   NL,   SE [1993/49]
TitleGerman:Verfahren zur kontinuierlichen Herstellung grosspartikulärer Kieselsole[1993/49]
English:Process for the continuous preparation of big particles silica sols[1993/49]
French:Procédé de préparation continue de sols de silice à grosses particules[1993/49]
Examination procedure04.05.1994Examination requested  [1994/26]
10.04.1995Despatch of communication of intention to grant (Approval: Yes)
28.04.1995Communication of intention to grant the patent
12.06.1995Fee for grant paid
12.06.1995Fee for publishing/printing paid
Opposition(s)03.08.1996No opposition filed within time limit [1996/43]
Fees paidRenewal fee
13.04.1995Renewal fee patent year 03
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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[A]EP0170578  (RHONE POULENC CHIM BASE [FR]);
 [AD]US3440175  (WELDES HELMUT H, et al);
 [AD]US3440174  (ALBRECHT WILLIAM L);
 [A]US3756958  (ILER R);
 [A]US3538015  (MINDICK MORRIS, et al)
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.